NO. 5 OSBURN : BRYOZOA 3 



Genus BARENTSIA Hincks 1880 

 Barentsia discreta (Busk), 1886 

 Osburn 1914: 185; 1940:327. 



In this species the chitinous stalk appears to have numerous pores, 

 which in reality are only in the internal stalk layer. It is circumtropical 

 in distribution, extending also into temperate waters. Osburn has 

 recorded it from the Tortugas Islands and Porto Rico. 



Distribution. — Station A30-39, 2 miles SW of Cape la Vela at 

 21 to 22 fms, a few colonies. 



ECTOPROGTA Nitsche 1869 

 Cyclostomata Busk 1852 



Family Grisiidae Johnston 1847 

 Genus CRISIA Lamouroux 1812 

 Grisia elongata Milne-Edwards, 1838 

 Osburn 1940:328. 



A circumtropical species, recorded by Osburn off the mouth of 

 Guanica Harbor, Porto Rico. 



Distribution. — Station A18-39, 8 miles SW of San Nicolaas Bay, 

 Aruba Island, at 24 fms. 



Family Oncousoeciidae Canu 1918 



Genus ONCOUSOEGIA Canu 1918 



Oncousoecia arcuata Canu and Bassler, 1928 



Canu and Bassler 1928: 158. 



Ten specimens of this linear encrusting species were found on coral- 

 lines and shells. All of the zoaria are very small, the longest only 4 mm, 

 but the colonies less than 2 mm in length were in reproduction. It has 

 been previously recorded only by Canu and Bassler at the type locality. 

 Albatross Station D. 2639, Straits of Florida. 



Distribution. — Station At505, Aruba Island at 23 fms. 



Genus PROBOSGINA Audouin 1826 

 Proboscina robusta Canu and Bassler, 1928 

 Canu and Bassler 1928: 157. 



The authors of this species had only a single specimen, without an 

 ovicell, from Albatross Station D. 2319, north of Cuba. Our specimens 



