122 



Gen. St omphia Gosse. Disk and tentacles retractile. Tubercles 

 obsolate. Sp. Sl. Chuichiae Gosse. 



ff IVon-coralligenous. Base non adherent. 



Farn. 4. I ly anthidae. Lower extreniity rounded, simple. 



Gen. Peachia Gosse. Tentacles of one kind, marginal. Co- 

 lunin tliick, pear-shaped. Mouth with a papillate gonidial tube. Sp. 

 P. hastata Gosse, P. undata Gosse, P. triphylla n. sp. 



Gen. Ilyanthus Forb. Tentacles of one kind, marginal. Co- 

 lumn thick, pear-shaped. Aloulh simple. Sp. J. scoticus Forb., J. 

 Mitchellii Gosse. 



Gem. Edtcardsia Quatref. Tentacles of one kink, marginal. 

 Column slender, long, worm -shaped. Invested with an epiderniis. 

 Sp. Edw. callimorpha Gosse, E. carnea Gosse. 



Gen. Halcampa Gosse. Tentacles of one kind, marginal. 

 Column slender, long, worm-shaped. Without an epidermis. Sp. H. 

 chrysauthellum Peach, H. microps n. sp. 



Gen. Ar achn actis Sars. Tentacles of two kinks, marginal 

 and gular. Naked 5 freely swimniing. Sp. A. albida Sars. 



Gen. Cerianthus Delle Ch. Tentacles of two kinds, marginal 

 and gular. Column inferiorly perforate. Dwelling in a niembranous 

 tube; sedentary. Sp. C. Loydii Gosse. 



Trib. II. C aryoph yll acea. Tentacles many, in two or more 

 series ; mostly increasing by lateral! buds; generally depositing a 

 corallum, wich is invariably calcareous and many-rayed. 



f Without a corallum. 



Fam. 1. C apneadae. Simple. 



Gen. Capnea Forb. Tentacles truncate. Sp. C. sanguineaForb. 



Gen. n. Aureliania. Tentacles crowned with bilobed hcads. 

 Sp. n. A, augusla, A. heterocera Thomps. 



Gen. Corynacti s Allm. Tentacles crowned with globose 

 heads. Sp. C. viridis Allm. 



Fam. 2. Zoanthidae. Compound. 



Gen. un. Zoanthus Cuv. (incl. Gen. Palythoa, Mamillifera 

 and Corticifera). Sp. Z. Couchii Johnst., Z. stilcalus n. sp., Z. Al- 

 deri n. sp. 



ff With a corallum. 



Fam. 3. Turhino liadae. Substance of corallum solid. Inter- 

 septal Chambers free. 



Gen. Caryophyllia Lam. (= Cyalhina Ehrbg.) Palules in a 

 Single circle. Columella of many slender twisted plates. Adherent. 

 Sp. C. Smithii Stokes. 



