616 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



856. Length of groups of photophores: Anal 176, 180, 183, and 17S; 

 preanal 121, 115, 113, and 117; subcaudal 86, 85, 83, and 83. Dis- 

 tance between preanal and anal groups of photophores 26, 27, 23, and 

 27; distance between anal and subcaudal groups of photophores 48, 

 49, 50, and 53; distance from upper edge of last abdominal photophore 

 to upper edge of first preanal photophore 164, 150, 158, and 159; dis- 

 tance from tip of snout to rear edge of maxillary 278, 272, 292, and 

 287; distance from orbit to base of upper preopercular spine 198, 195, 

 203, and 194; leDgth of snout 86, 83, 92 and 91; diameter of eye 129, 

 112, 137, and 138. The counts made on the types are given in table 

 1, p. 591, and table 2, p. 592; measurements made are given in table 

 3, p. 593. 



Color: The color pattern is shown in figure 12, p. 627. 



Range : This subspecies is known from 7 specimens collected in the 

 Hawaiian Islands and 1 from the North Pacific at lat. 36°58' N., 

 long. 164°30' E. 



Remarks: This subspecies differs from lynchus and sladeni, its 

 closest relatives, as is indicated in the key on p. 597. 



Genus Sternoptyx Hermann 



Sternoptyx Hermann, Xaturforseher, vol. 16, p. 33, 1781 (type species Sternoptyx 

 diaphana Hermann). 



The genus Sternoptyx has the following characters: Abdominal 

 vertebrae 11; caudal vertebrae 17 to 20; branched caudal rays 9 + 8; 

 pectoral rays 10 or 11; dorsal 9 to 11; anal 13 to 15; gill rakers on 

 first gill arch 4 to 7 - 2 to 4 4- 5 to 7 totaling 12 to 16. 



The number of organs in groups of photophores are as follows : 

 Abdominal 10, anal 3, branchiostegals 3, isthmus 5, preanal 3, pre- 

 opercular 1, preorbital 1, postorbital 1 , subcaudal 4, subopercular 1, 

 supra-abdominal none, supra-anal 1, suprapectoral 3. 



The dorsal blade consists of a single enlarged pterygiophore; there 

 are no anal pterygiophores between the haemal spines on four of 

 the abdominal vertebrae, usually numbers 5 to 8 or 6 to 9, the anal 

 pterygiophores being displaced forward. Teeth on edge of maxillary 

 directed outward; at origin of anal fin a pair of short spines, two 

 pairs of short postabdominal spines in front of pelvic bases; a pair 

 of preabdominal spines; preopercular spine single, directed down- 

 ward; short spine at lower posterior angle of dentary; postemporal 

 ending in a short spine; anterior edge of dorsal blade denticulate. 



Although I have made numerous counts and measurements on 

 specimens from the various seas, nothing could be foimd that indicated 

 more than a single species for the world. Counts made are given 

 in table 1, p. 591, and table 5, next page. 



