THE MICROSCOPE. 29 



S. Kellicott found the first specimen, on the pier at Black Rock, 

 near Squaw Island. Subsequently three other species have been 

 found by him and myself. One of them, we think, is new to science. 

 AH were named numerically, in the order found, till they could be 

 identified. 



No. I. This most abundant species has been identified as 

 Spongilla asperhna, Dawson. 



No. 2, CarteraUa tubisperma. The specimens of this sponge 

 found previous to the present season (1881) were so small and 

 fragmentary that but a poor idea of its character and growth is 

 given in my presentation of it, in a paper read before the Buffalo 

 Microscopic Club in April, 1S80. During October of this year I 

 found it in large pieces, attached to weeds, under and upon rocks 

 and stones and pieces of wood. In one or two instances I have 

 found it as large as one's hand, and an inch and a half thick. It is 

 generally green, but not always. 



No. 3 is difficult to describe from specimens found in our local- 

 ity. The action of the water upon the rocks where it is found is so 

 great as to take away all the upper part of the sponge. We have 

 identified it, however, with a species found in Philadelphia and 

 named by Dr. Leidy S. fragilis. The ovarian capsules of statoblasts 

 lie close together in a mass, encrusting rocks or any object in its 

 way. Above these, and enclosing them, is the sponge proper, made 

 up of spiculas sarcode and other elements that constitute the 

 spongilla^. 



No. 4 is identical with a specimen found in the Ottawa river by 

 Mr. Geo. Dawson, of Montreal, and named by him S. ottawaensis. 

 From some cause it does not grow large in this locality. I found 

 the largest pieces during last October that have been found. These 

 were quite fragmentary, the sponge having been pierced through 

 and through with numerous worms and other carnivorous animals 

 that feed upon it. 



Since penning the above, two other species, new to us, have 

 been found in this neighborhood ; one by Mr. E. S. Nott, of Ham- 

 burg, N. Y., and the other by myself in Niagara river. The one 

 found by Mr. Nott, and sent to me for identification, I took to be 

 Spongilla Carteri, a species hitherto only found in Bombay, India. 

 But, on a more thorough examination and subsequent comparison 

 with a type-specimen from Mr. Carter's collection, I conclude that 



