REVISION OF FRESHWATER SPONGES OF SPONGILLIDAE 7 



merely on account of the presence of rodlike or birotulate gem- 

 moscleres, respectively. 



Since a redefinition of the family Spongillidae appears to be an 

 impossible task until further detailed comparative investigations in- 

 volving all freshwater genera of Demospongiae become available, it 

 seems advisable to exclude the following atypical or ill-known genera 

 from the present revision. 



Baikalospongia Annandale — removed from the family Spongillidae and placed 

 into a new family, Adociidae, by De Laubenfels (1936). 



Baicalolepis Makuschok — gemmules apparently not produced. 



Cortispongilla Annandale — gemmules apparently not produced. 



Lubomirskia Dybowsky — gemmules apparently not produced. 



Nudospongilla Annandale — gemmules, if present, devoid of foramina, pneu- 

 matic layer, and spicules. 



Ochridaspongia Arndt — gemmules apparently not produced. 



Pachydictyum Weltner — gemmules apparently not produced. 



Potamolepis Marshall — gemmules apparently not produced. 



Swartschewskya Makuschok — gemmules apparently not produced. 



The following 18 genera of gemmule-producing freshwater sponges 

 as the typical representatives of the family Spongillidae are fully 

 revised in this paper: 



Acalle Gray Heterorotula, new genus 



Anheteromeyenia Schroder Metania Gray 



Corvomeyenia Weltner Pectispongilla Annandale 



Corvospongilla Annandale Radiospongilla, new genus 



Dosilia Gray Spongilla Lamarck, restricted 



Drulia Gray Stratospongilla Annandale 



Ephydatia Lamouroux, redefined Trochospongilla Vejdovsky 



Eunapius Gray, redefined Umborotula, new genus 



Heteromeyenia Potts, restricted Uruguaya Carter 



Genus Spongilla Lamarck, 1816, restricted 



Spongia Linnaeus, 1758, p. 1348 (part). 



Spongilla Lamarck, 1816, p. 98 (part). — Johnston, 1842, p. 110 (part). — Bower- 

 bank, 1863, p. 441 (part).— Gray, 1867, p. 552 (part) .—Dybowsky, 1880, 

 p. 5 (part.)— Carter, 1881a, p. 86 (part).— Vejdovsky, 1883, p. 15 (part).— 

 Retzer, 1883, p. 17 (part).— Lendenf eld, 1887, p. 88 (part) .—Potts, 1887, 

 p. 182 (part).— Mackay, 1889, p. 87 (part) .—Weltner, 1895, p. 116 (part).— 

 Girod, 1899, p. 107 (part) .—Annandale, 1909e, p. 559 (part); 1909b, p. 106 

 (part); 1912d, p. 384 (part); 1918a, p. 210 (part) .—Arndt, 1926, p. 341 

 (part).- Gee, 1931e, p. 49 (part).— De Laubenfels, 1932, p. 110 (part).— 

 Jewell, 1952, p. 445 (part) .—Penney, 1960, p. 11 (part). 



Euspongilla Vejdovsky, 1883, p. 15; in Potts, 1887, p. 172. — Wierzejski, 1885, 

 p. 32. — Annandale, 1911c, p. 69 (part). 



(Not Spongilla Wierzejski, 1885, p. 17 = Eunapius Gray, 1867, p. 552). 



Type species. — By subsequent selection (Annandale 1911c) 

 Spongia lacustris Linnaeus, 1758. 



