250 CLASS IV. 



PAPULOUS. 



35. Alcyonium papillosum. In a raised mass, 

 thickly covered with large convex tubercles. 



Mediterranean. 



TWO-MOUTHED. 



36. Alcyonium distomum. In thin patches sown 

 with red tubercles, pierced with two openings. 



On the stems of the large fuci in the European 

 seas. 



GORGONIAN. 



37. Alcyonium Gorgonio'ides, In small envelop- 

 ing patches; cells tuberculous, with a star-formed 

 opening. 



Coast of Cura^oa. 



corniculate. 



38 Alcyonium corniculafum. Four star-formed 

 oscules, surrounding a central tubercle, and termi- 

 nated by fpur upright appendages. 



Coast of Belgium. 



stellate. 



39. Alcyonium stellatum. Two terminating star- 

 formed oscules. 



Coast of Belgium. 



fluviatic. 



40. AhCY 0^ IV M Jluviatile. In shapeless spread- 

 ing patches, covered with pentagonal pores set close 

 to each other. 



