20 Canadian Record of Science. 



consisting of a thick chitinous coat filled with the usual 

 germinal matter, from which is very slightly prolonged an 

 everted trumpet-shaped aperture ; bearing slight traces 

 externally of microcell-structure and the polygonal tissue ; 

 making one of twenty such which are arranged so as to form 

 a subglobular body of the size mentioned ; situated around 

 a central cavity with their apertures inward; the whole 

 supported by statoblast spicules of various sizes, which, 

 intercrossing each other, form a net-like globular capsule, 

 in which the outer parts of the statoblast are fixed and 

 covered ; apparently (for the specimen is dry) deficient at 

 one point, which leads to the central cavity. Statoblast 

 spicules acerate, sharp-pointed, like the skeletal spicules, 

 but becoming much shorter and more coarsely spined as 

 they approach the chitinous coats of the statoblasts, where 

 they may be reduced to at least 27-6000ths inch in length, 

 although often increased to4-6000ths inch in thickness, and 

 their spines, which are very irregular in size and situation, 

 often as long as the spicule is broad." 



The words in brackets are mine. Mr. Carter goes on, 

 however, to notice the remarkable fact that this spongilla 

 has flesh spicules identical with those of M. everetti; and 

 suggests that possibly they may not belong to S. mackayi, 

 but that their presence may be owing to the proximity of 

 M. everetti, which grows in the same lake. My subsequent 

 observations go to prove that Mr. Carter's surmise is 

 correct, and that the flesh-spicules in the specimen are 

 adventitious. When in St. John's, Newfoundland, this 

 summer, I was conducted by the well-known historian 

 and scientitic observer, Eev. Moses Harvey, to Virginia 

 Lake, a beautiful sheet of water, a few miles from the city, 

 in which the development of Spongilla mackayi is very 

 luxuriant on the stones, etc., in depths of from two to four 

 feet of water. I have not observed these flesh-spicules in 

 the specimens from Newfoundland or in other specimens 

 from Nova Scotia. 



The second new species was described by Mr. Edward 

 Potts before the Philadelphia Academy of Natural Sciences, 

 at its meeting of Feb. 24th, 1885, as follows : — 



