NO. 5 OSBURN : BRYOZOA 5 



Genus DIAPEROECIA Canu 1918 



Diaperoecia floridana Osburn, 1940 



Osburn 1940:331. Smitt 1872:8 (Idinonea jnilneana Smitt noJi d'Or- 



h'xgny). Canu and Bassler 1928:160 (Diaperoecia radicata, non Kirk- 



patrick) . 



Smitt recorded it from Florida; Canu and Bassler from the Gulf of 

 Mexico and Straits of Florida, and Osburn from Porto Rico and North 

 Carolina. 



Distribution.— ?>tat[ons A14-39, A 18-39, At505, and At528. These 

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

 the Gulf of Venezuela at 22 to 24 fms. 



Family Idmoncidae Busk 1859 



This family has been recently re-examined by Borg (1944: 76) who 

 restricts it as described by Busk. He accepts the genus Idmidronea to 

 include the common "Idmonea" atlantica. 



Genus IDMIDRONEA Canu and Bassler 1920 

 Idmidronea atlantica (Johnston), 1847 



This is the widely distributed and well known Idmonea atlantica of 

 numerous authors, also listed as Tubulipora atlantica. Strangely enough 

 it has not hitherto been recorded from the V/est Indian region. In the 

 present material there is a specimen with four series of tubules on each 

 side of the midline and an elongate ovicell which extends upon both 

 branches at the bifurcation with the ooeciopore exactly as figured by 

 Osburn (1912:217, plate 19) from Woods Hole, Massachusetts. 



Distribution. — Station At526, 7 miles N of Tortuga Island at 41 fms. 



Idmidronea atlantica var. flexuosa (Pourtales), 1867 

 Pourtales 1867:111 (Idmonea flexuosa). Smitt 1872:6 (Idmonea 

 atlantica). 



This appears to be a slender variety of I. atlantica, as indicated by 

 Harmer (1915: 127) and, like the typical form it is widely distributed 

 around the world. The zoarium is slender and there are usually only 

 two rows of tubules on each side. The ooecium is short and usually situ- 

 ated below the bifurcation. In our material the variety occurred in the 

 same bottom sample with the typical atlantica at Station At526. Pourtales 



