A LIST 



OF THE 



BRITISH GENERA OF SPONGES, 



WITH THE NUMBER OF SPECIES OF EACH FIGURED IN 



VOLUME III. 



Order 1. CALCAEEA. 



Grantia ... 4 



Leucosolenia . . 4 



Leucouia . . . 4 



Leucogypsia . . . . .1 



Order 2. SILICEA. 



Geodia Sub-order 1 . . .1 



Pachymatisma 1 



Norrnania . 1 



Ecionemia . . 3 

 Polymastia 



Halyphysema . .2 



Ciocalypta . . . 2 



Tethea ... 6 



Halicuemia . . 1 



Dictyocylindrus ... .12 

 Phakellia 



Microciona . . 12 



Hyineraphia . 

 Hymedesmia . ... 7 



Rapliiodesma . . . . .4 



Hymeniacidon Sub-order 2 42 



Battersbyia . . . . .1 



Halichondria Sub-order 3 . . . .30 



Isodictya . . .54 



Spongilla . . . .4 



Desmacidon 4 . . .12 



Rapkyrus ,, . .1 



Diplodemia 5 . 1 



Order 3. KEEATOSA. 



Spongionella Sub-order 1 . . .1 



Chalina 3 . . 8 

 Ophlitaspongia 



Verongia 4 . . . .1 



Dysidea 7 . . . .2 



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