of Clupeid FisheB. 19 



3. Neosteus castelncBana. 



Pelkma castehiceana, Cuv. & Val. Hist. Nat. Poiss. xx. p. 30G (1847). 

 rellona Jiavipinnis, Giiuth. Cat. Fish. vii. p. 464 (1868). 

 llisha flavipinnis, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, 

 p. 435. 



Depth of body 3^ to 3J in the length, length of head 3J 

 to 3f. Ventral profile more convex than dorsal. Snout a 

 little shorter than diameter of eye, which is 3^ to 4 in length 

 of head; maxillary extending to below middle of eye or a 

 little beyond; lower jaw strongly projecting. Ridges on 

 head converge slightly posteriorly ; greatest distance between 

 them 2^ to 2j in diameter of eye. 23-26 gill-rakers on 

 lower part of anterior arch. Scales 63-66/17-19; ventral 

 scutes 21-23 + 13-14. Dorsal 19-20; origin nearer end of 

 snout than base of caudal. Anal 40-41 ; origin behind 

 dorsal ; length of base 3|- to 3? in length of body. Pel vies 

 longer than eye; inserted niuch nearer base of pectoral than 

 origin of anal. Axillary scale of pectoral reaching middle 

 of first ray or beyond. 



Coast of Surinam and Brazil ; Upper Amazons. 



Three specimens, 280-390 mm. in length. 



f The following species are placed provisionally in this 

 genus. They appear to be closely related to Neosteus flavi- 

 pinnis and castelnceana^ but, as they are not represented in 

 the British Museum collection, I am unable to say whether 

 they possess the toothed bone in place of the ligament in 

 the upper jaw : — 



4. Neosteus altamazonica. 



Pellona altamazonica, Cope, Proc. Acad. Nat. Sci. Philad. xxiii. 1871, 

 p. 256. 



Depth of body equal to length of head, which is 3J in 

 length of body. Snout equal to diameter of eye, which is 

 { length of head. Scales 77/23. Dorsal 18 ; origin nearer 

 base of caudal than end of snout. Anal 38-39; origin 

 below last dorsal ray. Pelvics equal to eye. 



Total length 186 mm. 



Ambyiacu River, Ecuador. 



5. Neosteus harroweri. 



liisha harroweri, Fowler, Proc. Acad. Nat. Sci. Piiilad. Ixix. 1917, 

 p. 128, tig. 1. 



Depth of body 2f in the length_, length of head 3^. 

 Ventral profile more convex than dorsal. Eye 2j in length 

 of head. Maxillary extending to beyond anterior edge of 



2* 



