32 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



the photographs (plate 21, figs. 5-9) presented by Canu and Bassler, 

 but their figures show no avicularia, they describe it as encrusting "cover- 

 ing large surfaces," the measurements are slightly smaller and the 

 primary aperture as broad as it is long. In rubra the ovicell is described 

 as entirely covering the aperture. As the only ovicell found on rosacea 

 is broken on the top, it is impossible to determine the extent of the ooecial 

 cover, but the aperture is completely encircled except for a deep sinus in 

 the peristome of the proximal border. 



It is interesting to find a recent representative of this genus w^hich 

 has been known only as a fossil. 



Type.—AHY no. 5. 



Type locality. — A 14-39, 2 miles SW of Cape la Vela, Colombia, 

 21 to 22 fms, three detached branched colonies, largest 12 mm in length 

 by 4 mm in diameter. 



Distribution. — Stations A42-39, At503, and At528. These stations 

 place the locations at Cape la Vela, Colombia; Margarita Island and 

 Gulf of Venezuela at 10 to 22 fms. 



Subfamily HippOpoHninae Bassler 1935 

 Genus HIPPOPORINA Neviani 1895 

 Hippoporina porcellana (Busk), 1860 



Smitt 1873:62 (Lepralia cleidosto?fja). Osburn 1914:209 (Lepralia) ; 

 1940:428. Canu and Bassler 1928:104 (H. cleidostoma) ; 1930:18 

 (H. cleidostoma). Marcus 1937:96. Hastings 1930:721. 



There has been considerable discussion concerning the identity of 

 cleidostoma Smitt with porcellana Busk. Canu and Bassler maintain that 

 they are not at all the same, but Hastings and Marcus have given good 

 reasons for placing cleidostoma in synonymy. Miss Hastings has examined 

 Busk's type specimen and points out the variability within a single 

 colony. The specimens in the Hancock collection are too incomplete to 

 afford additional data. The species is known from Madeira (type 

 locality), Florida, Porto Rico, north of Cuba, Gulf of Mexico and east 

 of Yucatan. Marcus records it from Santos Bay, Brazil, and it is a 

 common form on the Pacific coast from British Columbia to the Galapa- 

 gos Islands. 



Distribution. — Stations A 14-39 Cape la Vela, Colombia at 22 fms 

 and A42-39 Margarita Island at 18 fms. 



