78 Journal of the Asiatic Sociely of Bengal. [January, 1913. 
supposed genera as defined by Dybowski; Miclucho-Maclay’s ! 
original description of Veluspa being of too general a nature 
to carry much weight. The courtesy of the authorities of the 
St. Petersburg has recently enabled me to examine a large 
collection from Lake Baikal in which four of the species 
assigned provisionally to Veluspa are well represented. These 
are V. batcalensis (Pallas), V.bacillifera (Dybowski), V. abietina, 
Svartzevski, and V. intermedia (Dybowski). They may be taken 
ing with the biology of Cortispongilla (antea, p- 76), the most 
obvious generic character of Veluspa (Lubomirskia) is the fact 
urning from the peculiar Baikal sponges to species that 
must be assigned definitely to the Spongillidae, I propose first 
to consider two genera (Corvospongilla and U ruguaya) that un- 
doubtedly belong to the Spongillinae. 
Fam. SPONGILLIDAE. 
Subfam. SPONGILLINAE. 
Genus CORVOSPONGILLA, Annandale. 
(Plate iv, fig. 1.) 
"Ree. Lad, Moses nay ee 
g 
detail. My only reason for introducing it here is to point out its 
& 
type-genus of the Potamolepidinae. The skeleton-spicules, as 
1 Ibid. (7) xv, No. 3, p. 2 (1872). 
