Extensions



THE SECOND SUBSECONDARY CLASSIFICATION: When a group of fingerprints

becomes so large that it is cumbersome and unwieldy, even though fully

extended, it can be subdivided further by using a second subsecondary

division, which is brought up into the classification formula

directly above the subsecondary, and for which the symbols S, M and L

are used. The following table is used:



Index Middle Ring



1 to 5, inclusive, S. 1 to 8, inclusive, S. 1 to 10, inclusive, S.

6 to 12, inclusive, M. 9 to 14, inclusive, M. 11 to 18, inclusive, M.

13 or more, L. 15 or more, L. 19 or more, L.



If this table is referred to, a study of figure 352 will demonstrate

the use of the second subsecondary.







LEAVE THIS SPACE BLANK SEX

+--------------+

FBI No. RACE

+--------------+ LAST NAME FIRST NAME MIDDLE NAME

---------------------------------------------------------------+----------

SIGNATURE OF PERSON CONTRIBUTOR ALIASES HT. WT.

FINGERPRINTED AND ADDRESS (IN.)



DATE OF

----------------------------- BIRTH

RESIDENCE OF PERSON

FINGERPRINTED HAIR EYES



--------------------------------------------------------------------------

OCCUPATION ARREST NUMBERLEAVE THIS SPACE BLANK



------------------------------------------

SCARS AND MARKS PLACE OF

BIRTH 22 M 11 U OOO

-------------CLASS

-----------------------------CITIZENSHIP L 6 U OMI 13

SIGNATURE OF OFFICIAL DATE

TAKING FINGERPRINTS CHECK IF

NO CRIMINALREF.

RECORD IS

DESIRED

---------------------------------------------------------------------------

1. RIGHT THUMB2. RIGHT INDEX3. RIGHT 4. RIGHT RING 5. RIGHT LITTLE

22 11 MIDDLE 19 O O



[Illustration][Illustration][Illustration][Illustration][Illustration]



---------------------------------------------------------------------------

\ \ \ W W

---------------------------------------------------------------------------

1. LEFT THUMB 2. LEFT INDEX 3. LEFT M4. LEFT RING 5. LEFT LITTLE

18 10 MIDDLE I I 13



[Illustration][Illustration][Illustration][Illustration][Illustration]



---------------------------------------------------------------------------

/ / W W /

---------------------------------------------------------------------------



WCDX EXTENSION: In the extension used in the Federal Bureau of

Investigation for the large whorl groups, the type of whorl is

designated by the symbols W, C, D, or X for the index fingers and w,

c, d, or x for all other fingers, according to its classification as

defined in figure 354. These symbols are used for subclassification

purposes only and are brought up into the classification formula

directly above the subsecondary in their respective positions, the

right hand being the numerator, the left hand being the denominator.



SPECIAL LOOP EXTENSION: In the all-loop group



(1R-U)

------

(1R-U),



the following special loop extension may be used, utilizing the ridge

counts in fingers Nos. 2, 3, 4, 7, 8, 9, and, if necessary, No. 10:



Ridge Counts Value



1 to 4, inclusive 1

5 to 8, inclusive 2

9 to 12, inclusive 3

13 to 16, inclusive 4

17 to 20, inclusive 5

21 to 24, inclusive 6

25 and over 7



The resulting values in this extension are brought up into the

classification formula directly above the subsecondary in their

respective positions, the right hand being the numerator, the left

hand being the denominator.



In addition to the extensions already mentioned, fingerprint groups

may be divided into male and female, and by age (either by year or by

arbitrarily setting an age limit, beyond which a print bearing such an

age would be filed separately in a Reference or a Presumptive Dead

file).



In the files of the Federal Bureau of Investigation, all prints

bearing an age of 55 through 74 are filed in the Reference group and

all prints bearing an age of 75 years or more are filed in the

Presumptive Dead file. Persons 75 years of age or older, in regard

to crime, may be considered as generally inactive and thus are filed

as Presumptive Dead. Such a group provides for removing from the

other files the cards concerning those of whom no notice is ever

received as to death.



A separate file should be maintained for deceased persons, for

possible future reference.



A separate file should be maintained for all prints bearing

amputations and which have an unequivocal statement or marking from

the contributor to that effect.



Permanent scars also may be utilized for this purpose, giving three

more groupings: those prints having permanent scars in the right hand,

those having a scar in the left, and those in which scars appear in

both hands. A separate file may be maintained for mutilated prints

whether or not the permanent-scar division is used. This is usually

composed of prints so badly mutilated, or so mutilated about the cores

and deltas, that intentional mutilation is suspected.







+--------------+ +--------------+ +--------------+ +--------------+

WHORL CENTRAL POCKET DUAL LOOP ACCIDENTAL

-W- LOOP -D- -X-



[Illustration] [Illustration] [Illustration] [Illustration]

+--------------+ +--------------+ +--------------+ +--------------+

PATTERN HAVING PATTERN HAVING TWO SEPARATE TWO OR MORE

ONE CORE. LINE ONE CORE. LINE AND DISTINCT DIFFERENT TYPES

DRAWN FROM DRAWN FROM LOOPS IN ONE PATTERN.

DELTA TO DELTA DELTA TO DELTA ANY UNUSUAL

CUTS ONE OR CUTS NO PATTERN NOT

MORE RECURVES RECURVES DEFINED IN

OTHER

CLASSIFICATIONS





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