176 SILURID^E. 



62. HEMIPIMELODUS*. 



Hemipimelodus, Bleeh, Prodr. Silur. p. 236. 



Adipose fin of moderate length or short ; a short dorsal fin with a 

 pungent spine and with seven soft rays ; anal fin moderately long. 

 Head osseous above ; barbels six. Nostrils very close together. 

 Palate edentulous ; teeth in the jaws villiform. Eyes below the 

 skin. Caudal fin forked ; ventral with six rays, inserted behind the 

 vertical from the dorsal. 



East Indies. 



1. Hemipimelodus borneensis. 



Pimelodus borneensis, Bleek. Nat. Tydschr. Nederl. hid. ii. p. 430. 

 Hemipimelodus borneensis, Bleek. Prodr. Silur. p. 238, and Ail. Ichth. 

 Silur. p. "43. tab. 82. fig. 3. 



B.5. D, 1/7. A. 18-20. P. ^. 



The length of the head is one-fourth or two-ninths of the total 

 length (without caudal). The eyes are small, situated between the 

 anterior and middle thirds of the head ; their diameter is one-third 

 of the width of the interorbital space. Head granulated above ; the 

 occipital process is keeled, triangular, longer than broad, extending 

 on to the short basal bone of the dorsal spine. Mouth rather small, 

 transverse. The maxillary barbels extend to the end of the head. 

 Dorsal fin about as high as the body ; its spine is strong, serrated 

 behind, as long as, or shorter than, the head. Adipose fin rather 

 longer than the dorsal, its length being more than half its distance 

 from the dorsal. Pectoral spine strong, as long as that of the dorsal 

 fin. Caudal fin forked, with pointed lobes. 



Sumatra and Borneo. 

 a. One of the typical specimens. From Dr. P. v. Bleeker's Collection. 



2. Hemipimelodus macrocephalus. 

 Bleeker, Prodr. Silur. p. 239, and Atl. Ichth. Silur. p. 43. tab. 82. fig. 2. 

 B. 5. D. 1/7. A. 19-20. P. 1/10. 

 The length of the head is contained thrice and a fourth or thrice 

 and two-fifths in the total (without caudal); the eyes are small, 

 situated between the anterior and middle thirds of the head, their 

 diameter being one-half or two-fifths of the width of the interorbital 

 space. Head granulated above ; occipital process carinated, trian- 

 gular, rather longer than broad, extending on to the small basal bone 

 of the dorsal spine. The maxillary barbels reach to the opercles. 

 Dorsal fin rather higher than the body ; its spine is strong, serrated 

 behind, two-thirds of the length of the head. Adipose fin scarcely 

 longer than dorsal, its length being one-half of its distance from the 



* 1. Nalla-jellah, Eussell, pi. 170.— Pimelodus (?) nella, C. $ V. xv. p. 162.- 

 Coromandel. 

 2. Pimelodus manilleneis. C.$ V. xv. p. 192.— Manilla. 



