Evermann and Goldshoroitgh — Fishes from. Canal Zone. 101 



We have also 11 cotypes, all collected by Mr. Jennings at the same time 

 and place as the type. One of these has been sent to INIr. C. Tate Regan 

 of the Briti-h .Museum, one to Dr. C. H. Eigenmann of Indiana Uni- 

 versity, one to the Mnseuin of ."Stanford University, and one to the 

 Field Mnseuin of Natural History. Of the remaining 8, o are in tlie U. S. 

 National Museum, and ;'> in tlie Reserve Series of the Bureau of Fisheries 

 as No. 5421. 



5. Brycon striatulus (Kner). 



Seven specimens ranging in length from 2.5 to 4 inches, from Rio Bo- 

 queron. 



Dorsal 10; anal :>(); scales about 70. 



6. Roeboides guatemalensis (Giinther). 



Ten specimens, 3% to 5 inches long, from Rio Boqueron and 9, 2.5 to 

 4 inches long, from a running ditch at Tabernilla. 

 Dorsal 10; anal 48; scales 78 to 80. 



Famii.v SYMBRANCHID^. 



TIIK SVMUKAXcnoiD KELS. 



7. Symbranchus marmoratus Bloch. 

 One specimen, 8 inches long, from li'io Boqueron. 



Family ANGUILLID.E. 



THE EELS. 



8. Anguilla rostrata (Le Sueur). 



COMMON EEL. 



Three examples, 2.5 to 3.75 inches long, from Caldera Island, Porto 

 Bello Bay. 



Family r(F:LTLIlD.E. 

 THE KILLIFIKHE.'*. 



9. Rivulus godmani Regan. 



One sijecimen, 1% inches long, collected by JNIr. Rusck in a small stream 

 at Tabernilla. 



Head 4 in length; depth 5.14; eye 2.75 in head; snout 4.5; dorsal 7; 

 anal 12; pectoral 12; scales 36, 25 before dorsal. 



This specimen diflers from any description M'e can find of any Rivulus 

 in having no ventral fins. Since one of the ventral fins is sometimes 

 absent in members of this family and we have but the single specimen, 

 we hesitate to separate it from godmani which it otherwise seems to be. 



A very interesting structure in this specimen is the " Cyclopean eye" in 

 the center of the occiput. It consists of a large round scale-like formation, 

 as large as eye, with radiating striae. We can find no reference to such a 

 structure nor anything like it in specimens of many genera tliat we have 

 examined. 



10. Qambusia episcopi Steindachner. 

 Two female specimens, 2 and 2,\ inches long, from a small mountain 

 brook on Caldera Island, Porto Bello Bay, January 24, 1908. These are 



