392 ' ON FRESH-WATER FISHES OF TRINIDAD. [Apr. 10, 



from yellowish to blackish blue, sometimes edged with black and 

 white. 



" Found singly or in pairs in most streams and pools and take a 

 hook readily at times." 



Hah. Rio Giande do Sul to Venezuela. 



35. AcARA PULCHRA Gill. (Plate XXV. fig. 1.) 

 " Small Oascarob." 



" This is a very elegant fish, prettily marked with liright green 

 and blue spots and with dark ci-oss-bars on the sides. It was 

 interesting to see one of these beautiful fish in charge of its family 

 of about one hundred young ones, which he or she was vigorously 

 defending. These small fry were moving under its body, and when 

 any other fish made an attempt to snatch one, he or she snapped 

 viciously at the ofiender. This species is plentiful everywhere," 



Hah. Colombia ; Venezuela ; Trinidad. 



36. OlCHIiOSOMA BIMACULATUM L. 



*' Large Oascarob." 

 " Plentiful in muddy rivers, ponds and swamps, but not in the 

 •clear streams." 



Hah. Brazil ; Guiana ; Venezuela. 



37. Philypnus dormitator Lacep. 



" Taken in the Caroni River ; the specimen was very docile, 

 allowing us to handle it and making no display of resistance." 



Hah. West Indies and Atlantic Coast streams from Mexico to 

 Guiana. 



38. Dormitator maculatus B1. 



" Taken at Bejucal Swamp in muddy pools." 



Hah. Atlantic coasts and rivers of Tropical America. 



39. GOBIUS FASCIATUS Gill. 



Body compressed, elongate, the depth 6 in the length, the 

 length of head 3^-3|. Snout as long as eye, the diameter of 

 which is 4 in the length of head. Interorbital space narrow. 

 Cleft of mouth slightly oblique, entirely below the level of the 

 eye ; maxillary extending to below anterior part of eye ; jaws 

 with bands of small pointed teeth and anteriorly with an outer 

 series of larger teeth ; posterior tooth of outer series in lower jaw 

 a curved canine. Gill-openings vertical, in front of the bases of 

 the pectorals, not produced forwards below. Head and nape, 

 thorax and lower part of abdomen naked ; scales finely ctenoid, 

 increasing in size posteriorly, abovit 32 in a longitudinal series. 

 Dorsal A^'I, 12 ; rays of anterior dorsal, especially the third, pro- 

 duced as filaments in the male. Anal 13. Pectoral without free 

 rays above, as long as head, extending to the origin of anal. 

 Ventrals extending nearly to the origin of anal. Caudal rounded, 

 rather elongate, \ the length of the fish. Greenish, with dark 



