NO. 5 OSBURN : BRYOZOA 33 



Hippoporina contracta (Waters), 1899 



Osburn 1914:211 (Lepralia contracta var. serrata) ; 1940:428. Canu 

 and Bassler 1920: 576 (Perigastrella). Marcus 1937: 98 (Perigastrella). 



This species is now known to be widely distributed in temperate and 

 warmer waters around the world. On the Atlantic coast of the Americas 

 it ranges from Cape Cod, Massachusetts, southward to Santos Bay, 

 Brazil and on the Pacific coast from southern California to the Galapa- 

 gos Islands. There has been considerable discussion as to its generic rela- 

 tionships. Canu and Bassler placed it in Perigastrella, Hastings left it in 

 that genus but placed it next to Hippoporina and Marcus suggested a 

 relation to Hippomenella. Osburn (1940: 428) placed it in Hippoporina 

 because of an array of similar characters. The species was listed by 

 Osburn from the Tortugas Islands, Florida, and from Porto Rico. 



Distribution.— ^t^tlom A14-39, A42-39, At500, and At526. These 

 stations place the locations at Caledonia Bay, Panama; Cape la Vela, 

 Colombia; Margarita and Tortuga Islands at 11 to 41 fms. 



Genus HIPPOMENELLA Canu and Bassler 1917 

 Hippomenella mucronata (Smitt), 1873 



Smitt 1873:45 (Hippothoa mucronata). 



This brilliantly red species was described from Florida at 29 fathoms, 

 by Smitt, and has not been noted since. Canu and Bassler (1928: 108) 

 doubtfully described H. rubra from the Gulf of Mexico at 30 fathoms, 

 the chief difference being the presence of avicularia in the latter species. 

 Our material consists of small fragments of a few zooecia, without avicu- 

 laria. It is necessary to wait for further specimens before deciding whether 

 rubra is to be submerged. 



Distribution. — Stations At505, Aruba Island at 23 fms and At528, 

 the Gulf of Venezuela. 



Hippomenella fissurata (Canu and Bassler), 1928 



Canu and Bassler 1928:110 (Lepralia fissurata). Osburn 1940:431. 



Described first as a fossil from the Pliocene of Panama. Osburn 

 recovered living specimens from Porto Rico and added to the description. 

 Our present material agrees well in most respects with the Porto Rican 

 specimens, except that the aperture is somewhat longer, measuring about 

 as in the fossil specimens. The lateral oral avicularia are quite constant 

 and about opposite the cardelles. The frontal is definitely an olocyst with 

 a coarsely grandular pleurocyst covering it rather late in calcification. 



