BRYOZOA 103 



Membranipora tuberculata Bosc 

 (Membranipora tehuelcha D'Orbigny ) 



PLATE XL Fig. l; 



Somewhat similar to the above but in this region 

 only found growing on Gulf Weed (Sargassum fili- 

 pendulum). Gulf Weed, as the name implies, is an 

 inhabitant of the Gulf Stream and is only occasional- 

 ly carried to the New Jersey coast, usually after 

 September storms. Gulf Weed and its accompany- 

 ing- bryozoon are fairly common in the vicinity of 

 Nantucket and Cape Cod because of the proximity 

 of the Gulf Stream, and are very abundant on the 

 Florida beaches. 



Hemiseptella denticulata Smitt 

 (Membranipora tenuis Desor) 



PLATE IX. Fig. 2; PLATE XI. Fig. 10 



A lace-like encrustation, made up of very small, 

 crowded, oval or oblong cells, which have the inner 

 part of the front partly closed over, but with an ir- 

 regular, usually three-lobjd ^aperture toward the 

 outer end, which is bordered 1))' small irregular spin- 

 ules. Encrusts pebbles, shells, etc. 



Fairly common Vineyard Sound to Chesapeake 

 Bay and south to the Gulf of Mexico, 



