470 OPHIOCEPHALID^E. 



height of the body is contained six times in the total length, the 

 length of the head three times and two-thirds, and that of the caudal 

 fin five times and a half ; the width of the head is three-fifths of its 

 length. The width of the interorbital space is more than the extent 

 of the snout, and contained four times and a half in the length of 

 the head. The maxillaiy does not quite extend to the vertical from 

 the posterior margin of the eye. There are five series of scales be- 

 tween the eye and the angle of the pra^operculum. The pectoral 

 extends to tlae origin of the anal fin, and its length is somewhat more 

 than one-half of that of the head. The length of the ventral is 

 nearly three-foiu'ths of that of the pectoral. Body and tail with 

 two series of alternate transverse blackish spots ; a blackish streak 

 from the eye to the scapula : these markings become indistinct with 

 age. The lower half of the body with scattered black dots. Fins 

 black or blackish ; the dorsal and anal with longitudinal series of 

 black spots. 



Fresh waters of the East Indian Continent and of Ceylon. 



a. Adult. Nepal. Presented by B. H. Hodgson, Esq. 



6. Adult : stufied. Loodianah. From Mr. Grifiith's Collection. 



c. Half-grown : skin. Dourra, Loodianah. Named Ophiocephalus 



indtcus. 



d. Adult : stuffed. Scharunpore. From Mr. Griffith's Collection, as 



Ojpliiocephalus indicus, Griff'. 

 c-g, h-i. Adult, half-grown, and young. East Indies. Presented 



by G. R. Waterhouse, Esq. — Types of Ophiocephahis lata, B. H. 

 k, l-m, n, 0, p, q, r-s, t. Adidt, hali-gi'own, and yoiuig. Ceylon. 

 u. Adiilt. From the Collection of the Zoological Society. 



2. OpMocephalus afl&nis. 



D. 30. A. 22. L. lat. 38. L. transv. 4/8. 



Several teeth in the lower jaw larger than the rest ; those of the 

 vomer cardiform, in a narrow band ; a single series on the palatine 

 bones. The height of the body is contained five times and thi-ee- 

 fifths in the total length, the length of the head three times and 

 three-fifths. The length of the caudal fin equals the height of the 

 body. The width of the head is three-fifths of its length ; the width 

 of the interorbital space is more than the extent of the snout, and 

 contained foiu" times and a quarter in the length of the head. The 

 maxillary extends nearly to the vertical from the posterior margin 

 of the orbit. There are five scries of scales between the eye and the 

 angle of the praeoperculum. The pectoral extends to the origin of 

 the anal fin, and its length is more than one-half of that of the head ; 

 the length of the ventral is three-quarters of that of the pectoral. 

 Body with dark cross-bands, which become irregiilar and more nu- 

 raei-ous below the lateral line, where they are edged with silveiy ; 

 an indistinct dark streak from the eye to the scapula, edged with 

 silveiy. Lower parts without black dots. Dorsal fin anteriorly with 

 two, posteriorly with three, anal with four blackish longituchnal 



