678 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



D. Ill, 10, I or III, 11, I, first branched ray 1% to 1% in head; 

 A. Ill, 35, I, to III, 39, I, first branched ray 1% to 1% ; least depth of 

 caudal peduncle 2^/4 to 3; caudal 1 to 1%, deeply forked, slender 

 lobes pointed; pectoral 1% to 11/3; ventral 21/3 to 2%. 



Pale brownish generally. No silvery lateral band. Sides of head 

 with silvery sheen. Iris silvery white. Fins pale, dorsal and pec- 

 toral dusted with dusky terminally, also hind caudal edge. Small 

 dark blotch at crown and several pale dusky specks at snout tip. 

 Humeral venules dusky. Iris silvery white. 



India, Pinang, East Indies, Bonin Islands, Melanesia. The dis- 

 tinctions for EngrauUs mystax and Engraulis 'purcma as given by 

 Weber and Beaufort do not seem to hold with my material. All my 

 specimens show the anal more than 3 times in the length, which they 

 attribute to Engraulis mystax^ in addition giving 13 lower gill rak- 

 ers. None of my specimens show the anal length 2% times in 

 length of the fish. 



For the present I admit Thrhsocles purava as having a shorter 

 maxillary, never quite reaching the pectoral origin, whereas in 

 Thrissocles mystax it at least reaches the pectoral origin and may 

 extend about 14 in fin length. Knowing the maxillary character 

 a variable one, I feel that this arrangement is purely tentative and 

 that possibly the two species are not really distinct. 



a.S.N.M. No. 72521. Batavia, Java. 1909. Bryant and Palmer. Length, 148- 

 150 mm. 2 examples. Both with 13 lower gill rakers. 



U.S.N.M. No. 86564. Bonin Islands. William Stimpson. Length, 165 mm. 

 Lower gill rakers 10+12 ; abdominal scutes 15+12. 



A.N.S.P. Calicut, India. James Hornell. Length, 79-96 mm. Four exam- 

 ples. Types of Engraulis hornelli. 



THRISSOCLES VITIROSTRIS (Gilchrist and Thompson) 



Engraulis vitirostris Gilchbist and Thompson, Ann. South African Mus., vol. 

 6, p. 201, 1908-11 (type locality: Natal; Inner Harbour, Durban).— Gil- 

 christ, Marine Biol. Rep. South Africa, No. 1, p. 64, 1913 (Natal). — Gil- 

 CHBiST and Thompson, Ann. Durban Mus., vol. 1, pt. 4, p. 296, 1917 (refer- 

 ence). — FowLEE, Proc. Acad. Nat. Sci. Philadelphia 1925, p. 195 (Delagoa 

 Bay). 



Thryssa vitirostris Barnard, Ann. South African Mus., vol. 21, pt. 1, p. 118, pi. 6, 

 fig. 5, 1925 (East London, Natal, Delagoa Bay, Chinde). 



Thrissocles vitirostris Fowler, Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 413, 

 1934 (St. Lucia; Durban, Natal) ; vol. 87, p. 366, 1935 (Durban), 



Depth 31/3 to 32/5 ; head 4 to 41/10, width 21/2 to 24^. Snout 5 in 

 head; eye 3% to 4I/2, greater than snout, subequal with interorbital ; 

 maxillary reaches little beyond pectoral origin or to first fifth of 

 pectoral; mandible 1^4 to 1% in head; interorbital 3% to 3%, con- 

 vexly elevated; head above and humeral region strongly venulose. 

 Gill rakers 15+21, lanceolate. 



