NO. 5 OSBURN : BRYOZOA 41 



a few fathoms. Osburn found it common at the Tortugas Islands, 

 Florida, and again at Guanica Harbor, Porto Rico. 



Distribution. — Stations A25-39 and A30-39, Cubagua Island, shore, 

 common on shells. 



Genus TETRAPLARIA Tenison- Woods 1878 



Osburn 1914:202 (Arborella). 



The zoarium is erect, articulated, with corneous joints, dichotomous. 

 Zooecia in four rows, in alternating pairs, back to back. The internodes 

 are short, 2 to 5 zooecia in a series. The frontal is a tremocyst with small 

 pores. The ovicell is endozooecial but somewhat prominent. No spines 

 nor avicularia. 



Tetraplaria dichotoma (Osburn), 1914 



Osburn 1914: 202 (Arborella dichoto?na) , and 1940: 448. 



Described from Tortugas Islands, Florida at 10 fathoms. Also 

 recorded by Osburn from Porto Rico, from the Bahama Islands and 

 from Beaufort, North Carolina. The present record extends the range 

 to the southern shore of the Caribbean Sea. 



Distribution.— '^ta.tion At529, 12° 09' 30'' N, 70° 31' 00" W at 

 39 fms. 



Family Phylactellidae Canu and Bassler 1917 



Genus LAGENIPORA Plincks 1877 

 Lagenipora verrucosa Canu and Bassler, 1928 



Canu and Bassler 1928: 137. Osburn 1940: 450. 



Hitherto known only from the records of Canu and Bassler, Florida 

 Straits, 56 fathoms and north of Cuba, 33 to 143 fathoms, and from 

 Osburn's record off southern Porto Rico at 6 fathoms. 



The species of Lagenipora have considerable resemblance to those of 

 Costazia and Lekythopora but are distinguished by the presence of a 

 tremocystal front with numerous large pores. The zooecia are not erected, 

 as in Costazia, but are recumbent with a more or less erect peristome 

 which usually bears an avicularium on each side at the top. 



Distribution. — Stations A18-39, A29-39, and At502. These stations 

 place the locations at Cape la Vela, Colombia; Aruba and Cubagua 

 Islands at 2 to 23 fms. 



