REVISION "BRITISH SPONGIADiE. 



245 



Genus Desmacella, Schmidt. 

 Skeleton fibrous. Megascleres tylostyli or styli, or 

 both. Microscleres sigmata and (or) toxa, occasionally 

 trichodragmata. 



Desmacella cavernula, B., LXXXII. (Topsent, 18, 



p. 84). 

 :peaclii, B., LXIII. (Topsent, 18, p. 84.) 

 „ variantia, B., XXXIII and XLV. 



Genus Biemma, Gray. 

 Sponges allied to Desinacella, but with the aspect and 

 structure of Halichondria. Megascleres : tylostyles. 

 Microscleres : sigmata. 



Biemma corrugata, B., XLIII. (Topsent, 18, p. 81.) 



inornata, B., XL VII. (Topsent, 18, p. 80.) 



Genus Esperiopsis, Carter. 



External form amorphous or symmetrical. Megascleres 



monactinal. Microscleres isochelse, with or without 



sigmata. 



Esperiopsis alder i, B., LVI. 

 clarkei, B., LVI. 

 coUina, B., 4, XIV. 

 deformis, B., 4, XIV. 

 dubia, B., XC, 

 edwardi, B., LVIIL (Kidley and Bendy, 



14, p. 78.) 

 foliata, B., LXXIIL (Carter, 1, p. 310.) 

 fitcoricm, Johnst., LVI. 

 funalis, B., 4, XV. 

 gracilis, B., LVIII. 

 hispida, B., 4, XII. 

 imitata, B., LXXVI. 

 mutida, B., LXXIV. 

 normani, B., LVI. 

 paupera, B., LV. 



