262 PROCEEDINGS OF THE ACADEMY OF [1887. 



3. Foraminal tubule shorter ; tendrils one or two, enveloi^ing the 

 tubule. (PI. VI, fig. V.) C. latitenta. 



4. Foraminal tubule still shorter ; tendrils three to five, very long 

 and slender. (PI. VI, fig. vi.) G. tenosperma. 



(1) Carterius stepanowii, Petr. (PI. VI, fig. iv.) 



Dosilia stepanowii, Dybowski. 1884. See Vejdovsky, "Diagnosis" 

 etc., p. 179. 



In reference to this species, described as above by Prof. Vejdov- 

 sky, I am kindly permitted to make use of the following note by 

 H. J. Carter, F. R. S. etc. in Ann. and Mag. Nat. Hist. 1887, p. 

 212. 



"This fresh-water sponge, which in 1884 was named "Dosilia (?) 

 stepanowii by Dr. W. Dybowski, from a specimen found near Char- 

 kow, in southern Russia (Annals, 1884, Vol. XIV. p. 60), was also 

 found in 1885 by Prof Fr. Petr, of the University of Prague, in the 

 neighborhood of Deutschbrod, in Bohemia, about 60 miles South 

 East of that city ; and his description of it, which is beautifully il- 

 lustrated, was published in the Czech language at Prague, in 1886. 

 It appears to be the same as that discovered by Mr. H. Mills, of Buffa- 

 lo, New York, in the Niagara River, in 1880, viz : Carterius tubis- 

 perma (Proc. Acad. Nat. Sci. Philadelphia, 14th. June, 1881, p. 150). 



"Thus this remarkable genus of Spongilla, first brought to notice 

 by Mr. Ed. Potts, of Philadelphia, in a specimen found in a small 

 stream in the late Centennial grounds, Fairmount Park, Philadel- 

 phia (ih. about August, 1880,) which he then named S. tentasperma, 

 and subsequently S. tenosperma (i6. p. 357), ending with Carterius 

 tenosperma, its present name, has now been found in Southern Rus- 

 sia and mid-Europe, as above stated. 



"In the same communication also Prof Petr has described and 

 illustrated, under the provisional name of Ephydatia bohemica, 

 another fresh-water sponge, found at Kavasetice, in the same dis- 

 trict, wherein the statoblast presents an incipient condition of the 

 curious development characterizing Carterius, with a spiculation 

 which appears to me, from the illustrations, to be very like that of 

 his C. stepanowii. 



"Lastly, Mr. H. Mills of Buffalo, in a letter dated 20th. Nov. 

 1886, sent me a specimen of Carterius from the Niagara River 

 which he considers allied to C. latitenta, Potts, wherein the expand- 

 ed portion of this development presents itself under the form of a 

 cup, with even, circular margin, (that is entirely without cirrous ap- 



