106 



BIOLOGICAL SURVEY OF 



styli and the absence of toxa from those from Beaufort, North 

 Carolina, and Woods Hole, but until more material can be 

 studied it was thought advisable to consider this specimen as 

 Microciona prolifera. 



A comparison of material from these three localities is 

 made in the following table : 



Geographical distribution. Vineyard Sound (Verrill), 

 Beaufort, N. C. (George and Wilson), Mount Desert Region. 



Family Suberitidae 



SuBERiTES Nardo 

 SuBERiTES HisPiDus (Bowerbank) 



Lambe (1896, p. 194, pi. 2, figs. 5, 5a-d). 



This species was taken at Stations D 19, 107, 130, 132. It 

 was very abundant at Station 132. Found on rock and blue 

 clay in 87 to 239 feet of water. 



All the specimens are irregularly circular, subhemispheri- 

 cal, with an even very hispid surface. In the living condition 

 this sponge is yellow except where the color is obscured by 

 adhering particles of mud and sand. In alcohol the specimens 

 soon become a yellowish gray. Lambe has described the 

 osculum in this species as a depressed opening about 6 mm. 

 in diameter and situated at the summit of the sponge. 

 Lambe 's interpretation of this area is thought to be errone- 

 ous, as the 'osculum' (Lambe) represents rather an oscular 

 area which is composed of many, sometimes ten or more, 



