HfPOSTOMA PLECOSTOMUS. 141 



single row around ; the surrounding lips not much 

 developed for sucking, and furnished at each angle 

 with a cirrhus very short and slender. The fins 

 have the first ray all strong ; the first dorsal fin is 

 proportionally large and much developed ; and the 

 tail is lunated, but with the lower lobe considerably 

 elongated. The formula of the fins are, 



Schomh. Spec. D. 1/7— P. 1/6— V. 1/5— A. -_C. 2/14. 

 Valenciennes. D. 1/7— P. 1/6— V. 1/5— A. 1/5— C. 16— Br. 3. 



The colour represented in the drawing is a green- 

 ish yellow, paler beneath, and having the former 

 colour prevailing entirely on the lower surface of 

 the fish and on the stronger rays of the fins ; the 

 whole body is covered with black spots, of consider- 

 able size upon the fins; the eyes are coloured 

 yellow. 



