1915.] natural sciences of philadelphia. 261 



Trinidad. 



Mr. Abbott also made a small collection from this island in Febru- 

 ary, 1914. Grapsus maculatus was obtained on the shore west of 

 Port-of-Spain. Bithynis ensiculus and Pseudothelphusa garmani 

 were secured in the San Juan River near San Juan. 



Poecilurichthys bimaculatus (Linnaeus). 



Adult from the San Juan River near San Juan. When fresh the 

 back was olivaceous, and lower surface paler. Sides of head silvery. 

 Iris reddish. Blackish humeral blotch horizontally ellipsoid, and 

 in pale area. Caudal blotch blackish, large, and includes middle 

 caudal rays. Streak of leaden along middle of side. Dorsal and 

 pectoral like back, also anal with exception of front edge which 

 orange, like ventrals. Caudal yellowish basally, tips grayish. 



Lebistes reticulatus (Peters). 



Many females and a few males from the San Juan River near 

 San Juan. Also three males from the Blue Basin in Blue Basin 

 Falls. These examples are very variable. 



Conodon nobilis (Linnaeus). 



One secured by Mr. Warrington in 1900. 

 .Equidens pulcher (Gill). 



Adult from the St. Joseph River near St. Joseph, and a young 

 example from the Blue Basin. 



Eleutherodactylus uricbi (Boettger). 



One from near Port-of-Spain. In life the throat was- brilliant 

 lemon-yellow, though has now faded white in alcohol. 



Costa Rica. 



Dr. Philip P. Calvert placed a small collection, made in 1909, in 

 my hands for study. It has not been presented to the Acadeni}'. 

 I am indebted to Dr. Calvert for the favor of examining the col- 

 lection as well as for the notes pertaining to it. Several interesting 

 crustaceans are also contained in it. These are Palcemon jamaicensis 

 for the Rio Bananito, Pseudothelphusia richmoncU from Quebrada 

 Honda near Juan Vinas, and Potamocarcinus nicaraguensis from 

 Peralta. 



Rivulus isthmensis Garman. 



Two from Laguna at Juan Vinas. 

 Priapichtliys annectens (Regan). 



Three from the Rio Bananito. 



