A NEW CORNUCOPINA (BRYOZOA) FROM THE 

 WEST INDIES 



By RAYMOND C OSBURN 

 Ohio State University 



(With Two Plates) 



All the previously known members of this genus are strictly south- 

 ern in their distribution, being found chiefly in the waters about 

 Australia, the southern part of the Indian Ocean, and Antarctica. 

 Of the 14 species, only i is known even to approach the Equator — C. 

 (Bicellaria) navicularis (Busk), which was taken by the Challenger 

 Expedition off Barra Grande, Brazil, some 9 degrees south of the 

 Equator at a depth of 2,200 fathoms. The occurrence of the present 

 species near Puerto Rico, taken by the Johnson-Smithsonian Deep- 

 Sea Expedition, is therefore worthy of more than passing notice. 



The genus Cormicopina was erected by Levinsen (Chilostome 

 Bryozoa, pp. 109-110, 1909), who separated out "the majority of 

 the species in the old genus Bicellaria:' The best account has been 

 given by Harmer {Siboga Expedition, 1926) who listed all the 

 species with their known distribution. There is an important typo- 

 graphical error in Harmer's paper (p. 422), which gives the locality 

 "Bay of Biscay" for C. dubitata (Calvet), as this species was taken 

 in the Bay of Biscoe, Graham's Land, Antarctica, The genus is dis- 

 tinguished from the well-known Bicellaria by the exceedingly tall, 

 stalked avicularia, by the arrangement of the numerous spines, and 

 by the nature of the ovicell. 



CORNUCOPINA ANTILLEA, n. sp. 



Zoarium erect, stalked, profusely branched. The type specimen, 

 which is about 80 mm. in height, is free from lateral branches for a 

 distance of about 25 mm. above the base, and the "stalk" is conspicu- 

 ously thickened by the large number of radical fibers, some of which 

 originate high up on the branches. The central stalk and the stems of 

 all the branches are formed primarily by the union of the tubular 

 proximal ends of the biserial, alternating zooecia. The branches sub- 

 divide, often several times, giving the colony a beautiful plumose 

 appearance. 



Smithsonian Miscellaneous Collections, Vol. 91, No. 30 



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