202 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Suberites sulphureus, Bean, XXXVII. 

 „ tenebrosus, B., 4, XV. 

 ,, tenuiculus, B., 4, I. 

 ,, virgultosus, Johnst., XXXV. 

 Genus Polymastia, Bowerbank. 

 With raammiforni projections. Megascleres tylostyli 

 or styli. No rnicroscleres. 



Note. I include here P. (Tethea) spinularia ,~B . Oscar 

 Schmidt referred this species to his Bacliella. How- 

 ever the figure given by Bowerbank shows no special 

 resemblance to the symmetrical structure of Bacliella 

 (nor of Trichostemma and Halicnemia) . Still I have 

 some doubt in regard to the systematic position of 

 this species, as it contains oxea in addition to the 

 tylostyles, and as its mammiform projections are 

 very short. 

 Polymastia bulbosa, B., X. 



conigera, B. LXXII. 

 mammillaris, B., XII. (Vosmaer, 21, p. 

 14; Hanitsch, 7, p. 166.) 

 ornata, B., IX. 

 radiosa, B., XI. 

 robusta, B., X. (Bidley and Dendy, 14, 



p. 210.) 

 spinula, B., XL 

 spinidaria, B., XV. 

 Genus Quasillina, Norman. 

 " Sponge corticate, stipitate, with oval body, bearing a 

 single osculum at the summit, and short stalk. In the 

 cortex primary skeleton fibres ascend in parallel lines 

 from the base, crossed at right angles by secondary ones. 

 Spicules, large and small styli." Kidley and Dendy, 14, 

 p. 225. 



