PORIFERA OF THE L.M.B.C. DISTRICT. 927 
than in most species of Stryphnus, and the oxeas are 
not colossals, while they do seem to be arranged in bundles.”’ 
Prof. Sollas further suggested placing Sezrzola compacta as 
a new species of the genus Stryphnus, Sollas.* 
In consequence of Prof. Sollas’s advice I have now de- 
cided to drop the new family ‘ Seiriolidee’’ which J esta- 
blished in my former report, and I place the new sponge 
amongst the Sanidasterina, a sub-family of the family 
Stellettide. But I still intend to retain the new genus 
** Serriola.” The differences between it and the genus 
Stryphnus justify, I think, my doing so. These differences 
ake 2 
(1.) Stryphnus—The choanosomal megascleres are colos- 
sal oxeas, closely strewn through the sponge, 
not aggregated to form fibres and not radiately 
arranged. Semriola—The choanosomal megas- 
cleres are oxeas of ordinary size, and besides those 
also styl, strongyla and tylota. The spicules 
seem to be aggregated in bundles, and somewhat 
radiately arranged. 
(2.) Stryphnus—The microscleres are some form of eu- 
aster, and an irregular amphiaster or sanidaster. 
Setriola—The microscleres are typical forms of 
oxyaster and sanidaster. 
(3.) Stryphnus—The flagellated chambers are either ap- 
hodal or slightly diplodal. Sezrola—The flagel- 
lated chambers are eurypylous. 
Stelletta collingst, Bowerbank (Pl. XIV., figs. 1—8). 
Tethea, collingsiit, Bowerbank. 
Tethea schmidtei, Bowerbank. 
Collingsia sarniensis, Gray. 
Collingsia schmidtei, Gray. 
Stelletta collingsii, Sollas. 
The sponge, which in my former report was mentioned 
* Sollas, loc. cit., p. 171. 
