xii CONTENTS. 







Opinions of Link, 



Page 58 



—60 



Dujardin, 



60 



—62 



Hogg, 



6:2 



—65 



Blainville and E. Forbes, 



65 



—66 



The Discoverers of the British Sponges, - 



70 



—75 



The Species of the British Sponges, 



77- 



-202 



Character of the class Amorphozoa, 



- 



78 



Synopsis of its Genera, - - . 



- 



79 



The genus Tethea and its species, 



81 



—87 



Halichondria and its species. 



88- 



-148 



Spongilhi and its species. 



149- 



-163 



Spongia and its species. 



164- 



-171 



Grantia and its species, 



172- 



-184 



Duseideia and its species, 



185- 



-191 



Halisarca and its species. 



192- 



-193 



Additions and Corrections, 



194- 



-202 



The British Lithophytes, 



- 



203 



Synopsis of the Genera, 



• - 



205 



The British Corallines, 



207- 



-215 



Opinions of Ellis of them. 



208- 



-210 



Lamouroux, 



210- 



-211 



Lamarck, 



211- 



-212 



De Blainville and Schweigger, 



- 212- 



-214 



Link, . . _ 



214- 



-215 



An experiment with Corallinoe, 



- 



215 



The genus Corallina and its species. 



216- 



-223 



Jania and its species. 



224- 



-227 



Halimeda and its species. 



228- 



-230 



The Nulliporidae, character of. 



- 



231 



Opinions of by Ellis and Pallas, 



233- 



-234 



Lamarck, 



- 



234 



Blainville and Borlase, 



- 



234 



Schweigger and Link, 



- 



235 



1 heir probable origin from Corallines, 



236- 



-237 



The genus NuUipora and its species. 



238- 



-242 



Synopsis of the Sponges, 



243- 



-252 



Lithophytes, 



253- 



-255 



Explanation of the Plates, 



257- 



-260 



Index, - - - 



261- 



-264 



