264 SILURID-S. 



1. Erethistes pusillus. 

 Mull. $ Trosch. I. c. pi. 1. fig. S. 



B. 6. D. 1/6. A. 11. V. 6. 



Head as broad as long, its length being equal to the height of the 

 body, and one-third of the total. Dorsal and pectoral spines very 

 strong. (M. $ T.) 



Assam. 



The typical specimen is not quite 2 inches long, and in the Berlin 

 Museum. 



d. Head and body covered with skin ; a pair of nasal barbels : Exostomatina. 



103. PSETJDECHENEIS. 



Pseudecheneis, Blyth, Journ. As. Soc. Beng. xxix. p. 15*. 



Adipose fin of moderate length ; a short dorsal with one spine and 

 with six rays ; anal fin rather short. Barbels eight, those of the 

 maxillaries very broad at their base. Mouth small, inferior ; teeth 

 villiform ; palate edentulous. Head depressed, covered with soft skin 

 above ; eyes small, superior. Caudal fin forked ; pectorals horizontal, 

 with a thoracic adhesive apparatus between, formed by transverse 

 plaits of the skin. Ventrals with six rays. Gill-opening small, not 

 extending on to the lower surface of the head. 



Himalayas. 



1. Pseudecheneis sulcatus. 



Glyptosternon sulcatus, M'Clell.Calc. Journ. Nat. Hisi. ii. p. 587. pi. 6, 

 lower figs. 



D. 1/6. A. 11. P. 1/13. 



The length of the head is one-fifth of the total (without cau- 

 dal) ; eye very small, situated behind the middle of the head ; the 

 lower surface of the head with numerous papillae, especially at the 

 chin; the maxillary barbels aie much shorter than the head. The 

 first dorsal spine flexible ; pectoral very large, extending beyond the 

 root of the ventral ; the outer peotoral and ventral rays broad, flex- 

 ible, with numerous fine transverse folds below ; the free portion of 

 the tail very slender ; caudal deeply forked 



Khasya Mountains. 



a. Type of the species : 3§ inches long. From Mr. Griffith's Col- 

 lection. 



104. EXOSTOMA. 

 Exostoma, Blyth, Journ. As. Soc. Beng. xxix. p 166. 

 Adipose fin long ; dorsal fin short, with a very slender or rudi- 

 mentary spine and with six rays ; anal short. Barbels six : two to 

 the nostrils, two to the maxillaries, and two below the mandible. 

 Mouth inferior, the lips being reflected, lobate, and spread continu- 



