670 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



ANALYSIS OF SPKCIES 



a'. Thrissocles. Keeled scutes extend from isthmus to ivent along abdominal 

 edge. 

 &\ Maxillary not reaching beyond opercle. 

 c\ Anal origin distinctly behind dorsal end; lower gill rakers 20 or more, 

 d*. Lower gill rakers 20 ; maxillary not reaching gill opening. 



scratchleyi 

 (i^ Lower gill rakers 21 to 27 ; maxillary reaches gill opening. 



e\ Lower gill rakers 21 to 25; abdominal scutes 27; snout % in eye, 



projects slightly malabarica 



e^ Lower gill rakers 27 ; abdominal scutes 23 ; snout equals eye, con- 

 spicuous kammalensis 



c^ Anal origin below or slightly behind end of dorsal ; maxillary reaches gill 



opening; lower gill rakers 13 hamiltonii 



&'. Maxillary reaches at least to pectorals. 



f. Anal below or little behind end of dorsal. 

 g^. Maxillary reaches pectoral origin. 



h^. Lower gill rakers 13; anal more than 3 times in total length 



without caudal mystax 



7^^ Lower gill rakers 17; anal 2% in total length without caudal. 



purava 

 h^. Lower gill rakers 21 to 24; anal 2% in total length without 



caudal vitirostris 



ff'. Maxillary reaches beyond pectorals. 



i*. Maxillary surpasses ventrals ; lower gill rakers 12 ; abdomi- 

 nal scutes 28 setirostris 



r. Maxillary reaches or nearly reaches ventral ; lower gill 



rakers 16 to 20 ; abdominal scutes 22 to 24 dussumieri 



f. Anal before end of dorsal ; lower gill rakers 14 to 17 ; abdominal 



scutes 25 valenciennesi 



a^ Thbissina. Abdominal keel before ventral without scutes ; lower gill rakers 

 20 to 22; anal behind dorsal baelama 



Subgenus Thrissocles Jordan and Evermann 



THRISSOCLES SCRATCHLEYI (Ramsay and Ogilby) 



Engraulis scratchleyi Ramsay and Ogilby, Proc. Linn. Soc. New South Wales, 

 ser. 2, vol. 1, p. 18, 1886 (type locality: Strickland River, New Guinea). — 

 Weber, Nova Guinea, vol. 9, p. 517, 1913 (Lorentz River at Bivak Island, 

 Regen Island and Alkmaar). — Weber and Beaufort, Fishes Indo-Australian 

 Archipelago, vol. 2, p. 34, 1913 (Southwest New Guinea in fresh water). — 

 Regan, Trans. Zool. Soc. London, vol. 20, pt. 6, p. 276, 1914 (Mimika River, 

 New Guinea). — Fowler, Mem. Bishop Mus., vol. 10, p. 32, 1928 (compiled). 



Depth 4% in total ; head 5I/3. Snout pointed, overlaps mouth, 2 in 

 eye; eye 31/2 in head; maxillary not reaching gill opening, enlarged 

 beyond mouth angle; teeth small, equal in both jaws, in long narrow 

 band on palatines, in 2 small isolated patches on vomer; interorbital 

 % of eye. 



Scales 43 in medial lateral series; 10 transversely. Scales large, 

 deciduous. Abdominal serrae 16+11. 



