THE KEY: The key is obtained by counting the ridges of the first loop appearing on the fingerprint card (beginning with the right thumb), exclusive of the little fingers which are never considered for the key as they are reserved for the final. The key, no matter where found, is always placed to the extreme left of the numerator of the classification formula (fig. 353). _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. [Illustration: 353] 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 NUMBER|LEAVE 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 CRIMINAL|REF.___________________________ | | RECORD IS | | | DESIRED | --------------------------------------------------------------------------- 1. RIGHT THUMB|2. RIGHT INDEX|3.