CONTENTS. 



Echinoidea. 



Page 



Introduction i. 



On f^eneric and specific Cliaracters in the Echinoids . . . . 3. 



Fani. Cidaridie 11. 



Diagnoses of the genera of the Fani. Cidaridee 28. 



Dorocidaris papillata (Leske) 31. 



Cidaris affinis Phil 35. 



Stereocidaris ingolfiana n. sp 38. 



Porocidaris purpnrata Wyv. Thomson 41. 



Table of the Cidarids occurring in the northern Atlantic 



and the Mediterranean 42. 



Fam. Echinothurida; 43. 



Diagnoses of the genera of the Fam. Echinothuridje. ... 62. 



Phorraosoma placenta Wyv. Thomson 66. 



Calveria h^-strix Wyv. Thomson 70. 



Araeosonia fenestratum (Wyv. Thomson) 72. 



Sperosonia Grimaldii Koehler 75. 



Tromikosonia Koehleri n. g., n. sp 78. 



Table of the Echinothurids occurring in the northern 



Atlantic 80. 



Fam. TemnopleuriiUe 81. 



Hypsiechinus coronatus n. g., n. sp 86. 



Page 

 On the Fam. Echinometradae Gray and the Subfam. Tripl- 



echinidje A. Agass go. 



Diagnoses of the F'am. Stomopneustidae, Echinidae, Toxo- 

 pneustidfe and Echinonietridte. with their subfamilies 



and Genera 133 



Fam. Echinidae 141 



Subfam. Parechinin^e r4 1 



Parechinus miliaris (Miill.) 141 



Subfam. Echininae 142 



Echinus elegans Dub. Kor 142, 



— Alexandri Dan. Kor 146 



— affinis n. ^p 150. 



— acutus Lamk . . .- 152 



— esculentus L 160. 



Fam. Toxopneustidje 162 



Subfam. Strongyloceutrotinae 162 



Strongylocentrotus drobachiensis 162 



Table of the Echinids of the Families Echinidae and Toxo- 

 pneustidie occurring in the northern Atlantic and the 

 Mediterranean 165. 



Appendix 169. 



Bibliography 183. 



