20 SILURIDJi. 



total (without caudal) ; the height of the body is contained from six 

 times and a half to eight times in the total length (without caudal) . 

 Barbels long ; those of the nostril reach to the base, and those of the 

 maxillary to the extremity of the pectoral fin. The pectoral fin does 

 not extend to the vertical from the origin of the dorsal ; pectoral spine 

 moderately strong, rather more than two-thirds of the length of the 

 fin, finely serrated nearly to its extremity. 

 Java, Ceylon. 



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



b, c-e. Adult, half-grown, and young. Ceylon (Point de Galle). 

 /. Adult: skeleton. Ceylon. 



16. Clarias liacauthus. 



Bleeher, Nat. Tydschr. Nederl. Ind. ii. p. 430 ; Prodi: Silur. p. 347; and 

 Atl. Ichth. Silur. p. 104. tab. 98. fig. 1. 



This species is very closely allied to the preceding, but its pectoral 

 spine has the outer edge not serrated, and its depth is contained only 

 six times, or six times and four-fifths, in the total length (without 

 caudal). 



Sumatra, Banka, Nias, Borneo. 

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



17. Clarias brachysoma. 

 D. 75. A. 60. P. 1/10. 



Caudal fin free. Vomerine teeth obtuse, forming a crescent-shaped 

 band which is considerably narrower than that of the intermaxil- 

 laries. Head smooth above, with the occipital process somewhat pro- 

 minent, two-thirds as long as broad ; its length is two-sevenths or 

 rather more than one-fourth of the total (without caudal), the height 

 of the body one-sixth. Barbels long ; those of the nostril reach to 

 the end of the head, those of the maxillary beyond the extremity of 

 the pectoral. The pectoral extends to the vertical from the origin 

 of the dorsal fin ; its spine is strong, finely serrated along its outer 

 margin, and two-thirds of the length of the fin. Uniform brown. 



Ceylon. 



a-c. From 5 to 6 inches long. Purchased of Mr. Cuming. 

 B. Vertical fins united. 



18. Clarias nieuhofii. 



Bontael, Nieuh. Lant- en Zee-reize, p. 271. 



Lampreta indica. Will. Ichth. Apjj. p. 4. tab. 6. fig. 2. 



Clarias nieuliotii, Cuv. ^ Val. xv. p. .386 ; Hi/rtl, Denkschr. Acad. Wiss. 



Wim, 1859, xvi. p. 17 ; Bleek. Prodr. Silur. p. 351, and Atl. Ichth. 



Silur. p. 105. tab. 99. fig. 1. 

 — — pentapterus, PleeL Nat. Tydschr. Nederl. Ind. ii. p. 206. 



D. 90-97. A. 74-75. P. 1/9. Vert. 19/56. 



Caudal fin united with dorsal and anal. Vomerine teeth small, 

 obtusely conical, forming a band which is rather broader than that 



