Apodal Fishes of Bengal. 



Ptyobranchus erythreus, Nob. 

 ix.— 3. 



The anal fin commences near the anus, 

 and contains 50 or more distinct 

 rays, when it slopes off into a nar- 

 row raphe connecting it with the 

 anal, which contains seventy or 

 more distinct rays. Tail compress- 

 \ ed and lanceolate. The fin rays 

 are D. 40 : A. 56 : C. 70. Co- 

 lour above red, minutely speckled 

 with black dots, below reddish 

 white. Length about 10 inches, 

 diameter about £ inch, 

 u Hab. — Bengal. 



Ptyobranchus multidentatus 



Nob. 

 ix. — 4. 



, (Tail thic 

 < are D. 

 ( Hab.— B< 



Tail thick and clumsy. The fin rays 

 42 : A. 36 : C. 64. 

 -Bengal. 



Pneumabranchus 



tus, Nob. 

 ix. — 5. 



PARVIDENTA- 



Head small, tail slightly tapering and 

 compressed, with the anal com- 

 mencing near the anus ; about 30 

 small hooked teeth forming a row 

 on either side of the jaws, with 

 only about 4 teeth, forming a row 

 on the vomer near the apex of the 

 jaw. P. 11 : D. 31: A. 38: C. 60, 

 or thereabouts. Colour purple, 

 and minutely dotted above the la- 

 teral line ; white below. Length 

 about 10 inches, diameter of the 

 body | inch. 



Ptyobranchus gracilis, Nob. 

 ix.-6. 



The head is very small, muzzle acute 

 and sharp, eyes close together, 

 about 22 sharp hooked teeth on 

 either side of the jaws and ten 

 forming a row on the vomer. Length 

 about 9 inches, diameter 1-5 th inch. 

 Colour purple above the lateral 

 L line, and white below. 



Ptyobranchus Brevis, Nob. 



(About four inches in length. P. 11 : D. 

 40 : C. 54, probably the young of P. 

 medius. 



The following are the only species here omitted, the 

 necessary works in which their descriptions appear, not 

 being procurable in Calcutta. The first three are referred 



2 G 



