ON SPECIES OF CYNOPOTAMUS. 
BY S. GARMAN. 
Cynopotamus gibbosus L. ; C. V. 
Search for variation in the luiinber of dorsal rays proved 
without avail, the number eleven is very constant. The 
range of variation in the anal includes about ten rays, 
50-60. The scales in the lateral line vary from 57-62 ; 
in the transverse series between the first ray of the dorsal 
and that of the anal there are usually sixteen scales above 
the line and fourteen below, rarely fifteen above and thir- 
teen below. The humeral and the caudal spots also vary 
greatly, being more often present on the young ; sometimes 
they are absent entirely on specimens from localities 
whence the greater number are well marked. Collected 
at Coary, Cudajas, lea, Javary, Jutahy, Lake Hyanuary, 
Manacapouru, Manaos, Obydos, Porto do Moz, Rio Negro, 
Serpa, Silva, Lake Saraca, Surinam, Tabatinga, Uerandu- 
ba and Villa Bella. 
Cynopotamus pauciradiatus. 
Anacyrtus pauciradiatus Gth. 
A considerable number were received from Lago do 
Maximo and Villa Bella. On those of a couple of inches in 
length, the spots on shoulders and tail are distinct. The 
rays in the anal vary from 44 to 46 ; the scales in the 
lateral line from 55 to 57 ; and in the transverse line be- 
(11) 
