EE VISION "BEITISH SPONGIADJE.' ! 



175 



But I have not deemed it necessary to give the generic 

 definitions in the other groups of Sponges, as for the 

 Calcarea I have exclusively followed Dendy (2, 3, 4), for 

 the Tetractinellida, Sollas (17), and for the Hexaceratina 

 and Monoceratina, von Lendenfeld (12). The definitions 

 of the genera of these groups will be found in the works 

 of these respective authors. 



PAET I. 



Boweebank's Nomenclatube. Be vised Nomenclatube. 



PI. I. Grantia compressa Sycon compressum, auctt. 



Sycon coronatum, E. & S. 

 Ute glabra, O.S. 

 Sycon elegans, B. 

 Leucosolenia botryoides, E. & S. 

 Leucosolenia contorta, B. 

 Leucosolenia coriacea, Fl. 



Leucandra nivea, Grant. 

 Leucandra fistulosa, Johnst. 

 Leucandra pumila, B. 

 Leucandra gossei, B. 

 Cydonium miilleri, Fleming. 

 Pachymatisma jolmstonia, B. 

 Stryphnus ponderosus, B. 

 Pcecillastra compressa, B. 

 Polymastia ornata, B. 

 Polymastia bulbosa, B. 

 Polymastia robusta, B. 

 Quasillina brevis, B. 

 Polymastia spinula, B. 

 Polymastia radiosa, B. 

 Polymastia mammillaris, B. 



(no sponge). 

 Ciocalypta penicillus, B. 

 Craniella cranium, auctt. 

 Tragosia infundibuliformis, J. 

 Stelletta collingsi, B. 

 Stelletta collingsi, B. 



I. 



Grantia compressa 



II. 



Grantia ciliata 





Grantia ensata 





Grantia tessellata 



III. 



Leucosolenia botryoides 





Leucosolenia contorta 





Leucosolenia coriacea 



IV. 



Leucosolenia lacunosa 



V. 



Leuconia nivea 





Leuconia fistulosa 



VI. 



Leuconia pumila 





Leucogypsia Gossei 



VII. 



Geodia Zetlandica 



VIII. 



Pachymatisma Johnstonia 





Ecionemia ponderosa 



IX. 



Ecionemia compressa 





Polymastia ornata 



X. 



Polymastia bulbosa 





Polymastia robusta 



XL 



Polymastia brevis 





Polymastia spinula 





Polymastia radiosa 



XII. 



Polymastia mammillaris 



XIII. 



Halyphysema ramulosa 





Ciocalypta penicillus 



XIV. 



Tetliea cranium 





Isodictya infundibuliformis 



XV. 



Tethea Collingsii 





Tetliea Schmidtii 



