64. ^:i,uKioHTnYs. 177 



dorsal. Pectoral spine as long as that of the dorsal tin ; caudal forked, 

 with pointed lobes. 



Eorneo and Sumatra. 

 (t. Ty])e of the species. From Dr. P. v. Bleeker's Collection. 



3. Hemipimelodus peronii. 



Pimelodus peronii, CV;'. ^- Val. xv. p. 101. 



B. 6. D. 1/7. A. 16. P. 1/11. 



Head covered with soft skin, as broad as long, a little more than 

 one-fifth of the total length (with the caudal) ; the eye is situated 

 in the anterior third of the length of the head, of which it is one- 

 fifth ; intcrorbital space thrice as broad as the eye. The maxillary 

 barbel extends scarcely beyond the end of the head. Dorsal and 

 pectoral spines strong, obscurely serrated. Adipose fin as long as 

 the anal, one-seventh of the total length. Caudal bilobed. ( Val.) 



India. 



63. KETENGUS. 



Ketengus, Bleek. Verh. Bat. Gen. xxi. Silur. p. 9. 



Adipose fin short ; dorsal short, with a pungent spine and with 

 seven soft rays ; anal of moderate length. Head osseous above ; 

 barbels six, small ; nostrils very close together, the posterior with a 

 valve. Palate edentulous ; each jaw with a single series of closely- 

 set, small, incisor-like, obtusely tricuspid or subtruncated tcetli. 

 Orbit with a circular eyelid. The gill-membranes are united, and 

 entirely grown to the isthmus, having a free posterior margin with- 

 out notch. Caudal fin forked ; ventrals with six rays, inserted behind 

 the vertical from the dorsal. 



East Indian Archipelago. 



1. Ketengus typus. 



Ketengus tvpus, Bleek. J'erli. Bat.Genootsch. xxi. Silur. p. 9; Natuurk. 



Tydsch\ Nederl. Ind. i. p. 271; and Atl. Ichth. Silur. p. 44. tab. 82. 



fig.l. 

 Pimelodus pectinidens, Cant. Mai. Fish. p. 261. 



B. o. D. 1/7. A. 20. P.^g. Y. 1/5. 



Head large, very broad, with obtuse snout ; cleft of the mouth 

 very wide ; the upper jaw is the longer. Dorsal spine not shorter 

 than the head. 



Pinang, Java, Madura, Sumatra, and Borneo. 



a. Type of the species. From Dr. P. v. Bleeker's Collection. 

 h. Young : skin. Pinang. From Dr. Cantor's Colle(;tion. 

 e-d. Half-grown. From the Haslar Collection. 



64. .ffiLURICHTHYS. 



Galeiehthvs, sp., Cuv. df Val. 



Ailurichthys, Baird 4- Girard, Proc. Acad. Xat. Sc. Phihd. vii. p. 26. 



Adipose fin short : a short dorsal fin with a pungent spine and 



VOL. v. X 



