13. CRYPTOPTERUS. 41 



slightly denticulated along its inner edge ; ventral very short, as long 

 as the eye. Caudal forked to its base, the lobes shorter than the pec- 

 toral. A small porus mucosus in the axil of the pectoral. Coloration 

 uniform ; sides silvery. 

 Sumatra. 



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



specimen has very minute barbels. 



b. Six inches long. From Dr. P. v. Bleeker's Collection. — This speci- 



men has been received from Dr. P. v. Bleeker as C. bicirrhis, 

 from which it differs in its higher body, in the length of the 

 pectoral spine, in the presence of a porus axillaris, &c. 



5. Cryptopterus schilbeides. 



Hemisilurus schilbeides, Bleek. Proclr. Silur. p. 297, and Atl. Ichth. 

 Silur. p. 94. tab. 90. fig. 4. 



B.9-10. A. 65-67. P. 1/12. V. 6? 



The height of the body is contained thrice and three-fourths to four 

 times and a fourth in the total length (without caudal), the length of 

 the head six times and a half or seven times. Nape of the neck deeply 

 concave. The diameter of the eye is two-fifths of the length of the 

 head. The maxillary barbels extend to the origin of the anal ; ppa- 

 rently no mandibulary barbels. Pectoral fin longer than the head, 

 with the spine slightly denticulated. The band of vomerine teeth is 

 interrupted in the middle. 



Sumatra and Borneo. 



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



6. Cryptopterus bicirrhis. 



Silurus bicirrhis, Cut: § Vol. xiv. p. 367. pi. 411; Bleek. Verh. Bat. Gen. 



xxi., Silur. Batav. p. 20, and Nat. Tydschr. Nederl. Ind. i. p. 271. 

 Kryptopteriehthvs bicirrhis, Bleek. Prod): Silur. p. 292, and Atl. Ichth. 



Silur. p. 89. tab. 90. fig. 1. 



B. 11. D. 1. A. 53-56. P. 1/12. V. 7. 



The height of the body is contained four times and three-fifths to 

 four times in the total length (without caudal), the length of the head 

 six times to six times and a half. Nape of the neck not elevated. Cleft 

 of the mouth twice as broad as long. The maxillary barbels extend 

 scarcely to the origin of the anal ; (mandibulary barbels absent ?). 

 Pectoral spine rather shorter than the head, not denticulated. No 

 porus mucosus in the axil of the pectoral fin. 



Java, Sumatra, and Borneo. 



7. Cryptopterus macrocephalus. 



Kryptopterichthys macrocephalus, Bleek. Prodr. Silur. p. 293, and Atl. 

 Ichth. Silur. p* 89. tab. 89. fig. 2. 



B. 9. D. 1. A. 52-53. P. 1/10. V. 6. 



The height of the body is contained four times and two-thirds in 



