498 Canadian Record of Science. 



substantially agreed on every point. On account of its 

 birotulate dermal spicules which caused it to approach M. 

 Everetti, and a tendency of the spinous processes in some 

 of the statoblast spicules to group themselves towards each 

 end of the shaft and assume a partial birotulate aspect, as 

 shown in the accompanying illustration given by Mr. Potts, 

 he was disposed to classify it as a Meyenia. The non- 

 birotulate character of the great majority of these spicules, 

 and the tangential position of their shafts with respect to 

 the spherical chitinous envelope of the statoblast, seemed, 

 however, more technically to bring it under Sjiongilla as 

 defined by Carter. 



But, in Meyenia acuminata, Potts, we have an example 

 of birotulate spicules placed tangentially. We have in 

 Spongilla Terras Novce, at all events, a form closely connect- 

 ing Spongilla and Meyenia. It is to be regretted that owing 

 to the distance and generally inaccessible nature of the 

 rocky-ridged, lake-cradling highlands around Trinity Bay, 

 that I have found it impossible to obtain more mature 

 specimens of this species as yet, such as would be collected 

 in October, for instance. Mr. Potts has published a descrip- 

 tion, which is substantially that given below, in the Proc. 

 Acad. Nai'Sei., Phila., 1886, pages 227-230. 



Spongilla Terrje JSTov^e, Potts and Carter. 



" Sponge encrusting ; sarcode of the young growth a 

 dense mass of minute spherical cells, embedding slender, 

 thread-like, curving lines of fasciculated skeletal spicules, 

 developing later into a very loose, open tissue, with few 

 connecting spicules, charged with statoblasts. 



. " Statoblasts, spherical, rather large, averaging about 

 0.036 inches in diameter; chitinous coat thin, "crust" 

 apparently wanting; aperture, single, circular, about .0015 

 inches in diameter. 



" Skeletal spicules relatively few, generally smooth, slen- 

 der and gradually pointed, forming, by overlapping each 

 other linearly, threadlike fascicles ; dimensions about 

 0.0067 by 0.0002. 



