DESCRIPTIONS OF NEW GENERA AND SPECIES OF FISHES FROM 



PUERTO RICO. 



By Barton Wariikn Evekmanx and Mili.ard Caleb Marsh. 



In December, 1898, the Commissioner of Fish and Fisheries sent the 

 Fish Commission steamer Fish Hmck to Puerto Eico for the purpose of 

 making investigations regarding the aquatic life of that island. The 

 investigations extended over a period of two months. The island 

 was circumnavigated and work was done at practically all places 

 where safe anchorages are found, and several trips were made by mem- 

 bers of the scientific staff to points in the interior of the island, where 

 the fresh-water streams were examined. The itinerary of the vessel 

 when working about the island was, briefly, as follows : 



Jan. 2 to 17, at and about San Juan. 

 Jan. 18, at Aguadilla. 

 Jan. 19 to 24, at and about Mayagiiez. 

 Jan. 25, at Ensenada del Boqueron. 

 Jan. 26 and 27, about Puerto Real. 

 Jan. 28 and 29, in Guanica Bay. 

 Jan. 30 to Feb. 2, at Ponce. 

 Feb. 3 and 4, at Arroyo. 

 Feb. 5, at St. Thomas. 



Feb. 6, running a line of dredgings between St. 



Thomas and Vieques Island. 

 Feb. 7, at Isabel Segunda, Vieques Island. 

 Feb. 8, dredging between Vieques and Culebra 



islands. 

 Feb. 9 to 12, about Culebra Island. 

 Feb. 13 to 15, about Hucares. 

 Feb. 16 to 18, about F.ajardo. 

 Feb. 19, at St. Thomas, coaling. 

 Feb. 20 to 22, at San Juan. 



Land trips to the fresh- water streams of the island were made by one 

 or more members of the party as follows : 



Jan. 8 to 10, to Caguas, where collecting was done Jan. 29, from Guanica, via Yauco, to Ponce. 



In the Rio Grande and the Rio de Caguita. 

 Jan. 12, to Bayamon, where the Bayamon River 



was examined. 

 Jan. 15 and 16, to Arecibo. 

 Jan. 22 and 23, from Mayagiiez to Aguadilla. 



Feb. 2 and 3, irom Ponce, via Coamo, Aibonito, 

 Cayey, and Guayama, to Arroyo. 



Feb. 16, from Hucares, via Ceiba, to Fajardo. 



Feb. 18 to 21, from Fajardo, v.a El Yunque Moun- 

 tain, Rio Grande, and La Carolina, to San Juan. 



Large collections of fishes, mollusks, crustaceans, and other aquatic 

 animals were made. These are now being studied by specialists in the 

 various groups and the results will be published in the detailed report 

 upon the work of the expedition, which is now in preparation and which 

 will soon be ready for publication. 



Among the fishes obtained are 3 new genera and at least 20 new 

 species, of which preliminary descriptions are given in the present 

 paper. In the detailed report upon the investigations of the Fish HawTc 

 in Puerto Kico will be found illustrations of most of these species. 



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