1906.1 FRESH-WATER FISHES OF TRIXIDAD. 



391 



The male is a very elegant little fish and varies considerably in 



colour and marking. -, i , • v i 



"Colour: Male olivaceous, silvery below ; a dark longitudinal 

 stripe from eye to middle of side, another on the posterior part of 

 the body ; usually two to four blackish spots, including one at 

 each end of the posterior stripe ; these may be accompanied by 

 reddish spots. Female olivaceous, silvery below, without spots.or 

 stripes." 



27. DORYICHTHYS LINEATUS Kaup. 



Hah. Atlantic Coasts and Rivers of_ Tropical America, the 

 African D, aculeatus being apparently distinct. 



28. Agonostomus monticola Bancroft. 



Eab. Fresh-waters of the West Indies (Jamaica, Barbados,. 

 St. Vincent, Dominica, Trinidad) and of Mexico. 



29. MUGIL BRASILIENSIS Ag. 



Hab. Cuba to Patagonia. 



30. MuGiL TRicHODON Poey. 

 ffab. Florida to Brazil. 



31. Centropomus undecimalis BL, and 



32. Centropomus ensiferus Poey. 



" These fishes, known as ' Broche,' ' Robalo,' or ' Snook,' were. 

 cau<vht in the Caroni River, where they have been taken over- 

 20 Sounds in weight. They are marine, but go a long way up 

 fresh-water streams in search of food. According to Mr. Pasea, 

 they can be bred in artificial ponds or in large fresh-water pools 

 that have no connection with the sea." 



RcdK Atlantic Coasts and Rivers of Tropical America. 



33. Polycekteus schomburgkii Miill. & Trosch. (Plate XXY.. 

 fig. 2.) 



"The 'King or Black Cascarob' is a very peculiar little fish, 

 which, when alarmed, changes almost instantly from black to^ 

 whitish or pinkish white, rapidly vibrates the pectoral fins, and, 

 instead of running away, turns on one side and remains tor a long 

 time in a crouching position. They are uncommon, and were 

 caught by means of a circular hand-net in the thick rank gra^s. 

 which grows at the sides of the ravines." 



Eab. Trinidad; Venezuela; Guiana. 



34. Crenicichla saxatilis L. 



" Name ' Mulet ' (pronounced Mil-lay). Head olive or greyish 

 green; eye with a dark crimson splash; back dull olive and 

 yellowish green, belly greyish or bluish grey ; pale green metallic- 

 spots on the sides often present, or if they be absent, blackish 

 cross-bars ; sometimes a blackish longitudiral stripe; fins varying 



