ART. 4 SPONGES OF CALIFORNIA de LAUBENFELS 111 



Deso^iption. — No gemniules could be found in this material, but 

 the smooth oxeote principal spicules, about 11/x by 330/a, and spiny 

 microxeas, about 6ju, by 65/x, as well as all other characteristics, are 

 those of the cosmopolitan and abundant SpongiUa lacustris. 



Remarks. — Gemmules are absolutely necessary for certain identi- 

 fication of most fresh-water sponges, but the probabilities are very 

 great that this is lacustris. 



Genus EPHYDATIA Lamouroux 



EPH YDATIA ROBUSTA (Potts) 



Meyeni-a robiista Potts, 1SS7, p. 225. 

 Ephydatia robusta Weltner, 1895, p. 127. 



Occurrence. — Potts (1887) recorded this species from Honey Lake 

 Valley near Susanville, Calif., in northeastern California, at an 

 elevation of about 1,400 meters. Annandale (1907, p. 24), recorded 

 it from Bhim Tal, Kumaon, northern India, at an elevation of 1,350 

 meters. These seem to be the only records for this species. 



Genus CARTERIUS Petr 



CARTERIUS TUBISPERMA (Potts) 



Carterella tubisperma Potts, 1881, p. 150. 

 Carterius tubisperma Smith, 1921, p. 15. 



Occurrence. — Smith (1921, p. 15), recorded a specimen of this 

 species as being in the United States National Museum with locality 

 listed as Fresno, Calif. It was collected by Gustav Eisen and 

 determined by Potts (U.S.N.M. No. 5979). This species is probably 

 cosmopolitan, there being numerous records from localities scattered 

 over the Eastern United States and Europe. It was originally de- 

 scribed without name by Mills (1880, p. 132). 



Family HALICLONIDAE - 

 Genus GELLIUS J. E. Gray 



GELLIUS EDAPHUS de Laubenfels 



Gellius edaphus de Laubenfels, 1930, p. 28. 



Holotype.—U. S.^.M. No. 21444; B.M. No. 29.8.22.17. 



Type locality. — Pescadero Point, near Carmel, July, 1926; all my 

 specimens have been removed from a mass at this point, readily 

 identified as to location from year to year. There is every indication 

 that it is the same sponge that remains there. Its placement is 

 ecologically most interesting ; it grows in a cavern at low tide, where 

 sponges are extraordinarily abundant as covering the walls and ceil- 

 ings; but it is the only one growing on the floor. It is just below low 

 tide, hence never out of water. It is very unusual to find sponges 



' For Haploscleridae Topsent. There is no sponge genus " Eaplosclera." 



