88 



INTRODUCTION. 



octactinellid.e 

 Heteractinellidje 



Astrceospongia. 

 Tholiasterdla. Asteractinella. 



CLASS II.— CALCISPONGLffi. 



1. Homocgela . . . Leucosolenia. No fossil forms known. { — As- 



cones of Haeckel). 



2. Heteroccela . . . Grantia,Sycon* Protosycon{= Sycones of Haec- 



kel), Leuconia, Leucandra, &c. (=Leucones 

 of Haeckel), * Corynella, * Sestrostomella, 

 * Pharetrospongia (Pharetrones). 



SUB-KINGDOM III.— CCELENTERATA. 



CLASS I.— HYDROZOA. 



Sub-class I. 



Hydrida . 

 corynida . 



Thecaphora 



4. Trachymedus^e 



-Hydroida (Hydroid Zoophytes). 



Hydra. No fossil foi'ms. 



Coryne, Tubularia, Hydr actinia, * Parkeria. 



Sertularia, Plumularia, Campannlaria, * Den- 



drograpius (?), * Callograptus {?). 

 Trachynema, sEghia, * Pcdcegina. 



Sub-class II. — Siphonophora. 



Calycophorid^e . . Diphyes. No fossil forms. 



Physophorid^e . . . Physalia. No fossil forms. 



Sub-class III. — Lucernarida. 



Calycozoa .... Lucernaria. No fossil forms. 

 Acraspeda (Discophora) . Aurelia, Rhizostoma, * Rhizostomites. 



1. MONOPRIONIDiE 



2. DlPRIONID^E 



a. Milleporidse 



b. Stylasteridse 



c. * Syringosphasridse 



" Sub-class IV. — Graptolitoidea. 



. Monograptus, Didymograptiis, Tetragraptus . 

 . Diplograptus, Ciimacograptus, Retiolites, Phyl- 

 lograptus. 



Sub-class V. — Hydrocorallinse. 



Millepora, * Axopora. 

 Sty/aster, Allopora. 

 . Syringosphixra, Stoliczkaria. 



* Sub-class VI. — Stromatoporoidea. 



Stromatopora, Actinostroma, Labechia. 



CLASS II.— ACTINOZOA. 



I. ZOANTHARIA. 



A. Actiniaria (Zoantharia 



malacodermata) . 



B. Antipatharia (Zoantha- 



ria sclerobasica) 



C. Madreporaria (Zoantha- 



ria sclerodermata). 

 a. Aporosa 



b. Rut 



Actinia. No fossil forms. 

 Antipathes. 



Turbinolia, Oc7ilina, Pocillopora, Rfceandrina, 

 * Columnaria, * Stazcria, * Holocystis, Mose- 

 leya. 



* Cyathophyllum, *Zaphrentis, *Cystiphylhi?n. 



