10. PRI8TIG ASTER. 461 



2. Pristigaster macrognathus. 



Opisthoptonis niacrognatliiis, iy/cc/.-. Xedcrl. Tydschr. Dirrk. iii. 18GG, 



p. sno. 



D. 16. A. 57-62. L. lat. 52. 



The height of the body is two-sevenths or one-third of tlio total 

 length (without caudal), the length of the head two-nintlis. Origin 

 of the dorsal lin equidistant between the root of the caudal and the 

 vertical from that of the pectoral. The length of the maxillary is 

 more than one-half of that of the head in adult examples, and equal 

 to one-half in specimens 5 inches long ; its posterior (supplementarj-) 

 portion is broad, and posteriorly overlapped by the dilated part of 

 the dentigerous portion. 



East-Indian archipelago. 



a. One of the ty|)ical specimens. From Dr. Bleeker's Collection. 



b. Half-grown. >Sarawak. Presented by the Marquis Doria. 

 e. Adult. Prom the Collection of the Zoological Society. 



3. Pristigaster macrops. 



Giinth. Pruc. Zool. Soc. 1866, p. 603. 



D. 13. A. 61. L. lat. 53. L. transv. 17. 



The height of the body is one-third of the total length (without 

 caudal), the length of the head two-ninths ; the diameter of the eye 

 is one-third of the length of the head. Origin of the dorsal fin mid- 

 way between the root of the caudal and scapula. The length of the 

 maxillary is less than one-half of that of the head ; and its posterior 

 (supplementary) portion is narrow, extending to the extremity of the 

 bone. Silvery, scapula black. 



Panama. 



a. Fine specimen, type of the species. From Mr. Salvin's Collection. 



4. Pristigaster dovii. 



Pristigaster argenteus, Giinth. Proc. Zool. Soc. 186G, p. (303 (not 

 Cuv.). 



D. 11. A. 56. L. lat. 51. L. transv. 13. 



The height of the body is two-sevenths of the total length (with- 

 out caudal), the length of the head rather more than one-fifth ; the 

 diameter of the eye is two-sevenths of the length of the head. Origin 

 of the dorsal fin considerably nearer to the root of the caudal than 

 to the scapula. The length of the maxillary is less than one-half of 

 that of the head, and its posterior (supplementary) portion is of mo- 

 derate width, extending to the extremity of the bone. 



Panama. 

 «. Type of the species. Presented by Captain Dow. 



