150 PROCEEDINGS OF THE ACADEMY OF [1881. 



proposed to group these under the genus Heteromeyeina, as H. 

 argyroypertna and H. 7-tpens: suggesting that the latter may pos- 

 sibly be the same as Bowerbank's Sf^wgiUa. now Jfeyejiia Bailei/i. 



Another nevr genus had been formed and dedicated to Dr. 

 Carter under the" name Carterella. to include the singular form 

 described by the sjvaker last \-ear in the Proceedings of the Acad- 

 emy, and then called Spongilla tentoifperma : changed later to 

 S. tenosperma. The distinguishing peculiarity of this genus is 

 that the tube surrovmding the foramen of the statosphere is 

 elonirated and diyides into :2-5 long, curling or t\nsted tendrils by 

 means of which during the winter the statosphere remains attached 

 to the stems or rootS upon which the sponge had grown. This 

 will now be Carterella tenosperma. 



A. second species has been added to this genus, the discoyery 

 of Professor Kellicott and Mr. Henry MUls. of Buffalo, under the 

 n.ame of Carterella tubisp>erma. In this, the tube is much longer 

 than in any sponge heretofore described, terminating in seyeral 

 strag:gling^ rather weak tentacles much shorter than in the former 

 species. The birotulate spicul* in the two forms are quite differ- 

 ent, and the species are unquestionably distinct. 



JuN-B -21. 

 The President. Dr. Ruschexbergee. in the chair. 

 Nineteen persons present. 



JrxE 28. 



The President, Dr. Ruschenberges, in the chair. 



Fifteen persons present. 



Jerome Gray was elected a member. 



M. S. Bebb, of Rockport, 111., and Chas. S. Sargent, of Brook- 

 line. Mass.. were elected correspondents. 

 The following was ordered to be printed : 



