LOXSDALE ON EOCENE CORALS FROM N. AMERICA. 



509 



they were generally open ; and obliteration of the pores, where 

 it occurred, was probably due chiefly to the infiltration of calca- 

 reous matter. The vesicle, as shown in the woodcut, resembled, 

 in the form of the opening, that of typical Cellepora?, but the 

 structure itself was more immersed in the body of the cell. 

 Localities. — Williamsburg, Evergreen. 



10. Cellepora similis. (sp. n.) 



Lobed or convoluted ; cells globular, confusedly aggregated, surface non-fora- 

 minated, more or less traversed by reticulated or radiating ridges ; mouth large, 

 circular, terminal ; a large hood-shaped projecting gemmuliferous vesicle. 



This coral possessed all the lead- 

 ing characters of typical species 

 of the genus, and it resembled C. 

 pumicosa in the form of the cells, 

 and in the confused mode of aggre- 

 gation : in that species radiating 

 ridges near the junction of the cells 

 may also occasionally be detected, 

 but to a much less extent than in 

 the fossil under consideration. The 

 leading distinction between the 

 fossil and recent polyparians con- 

 sisted in the perfect vesicle of the 

 former, when exhibited in sheltered 



Cellepora similis. 

 The figure represents the general 

 characters of an outer unprotected 

 surface greatly magnified ; but the 

 vesicle is not given in its perfect 

 state or with the projecting hood ; 

 it exhibits accurately the radiating 

 or reticulating ridges. 



places, not having a long spinous 

 process ; and there were other minor peculiarities, as the total 

 absence of a transverse plate near the bottom of the aperture. 

 Locality. — Williamsburg. 



II. Account of Twenty-six Species of Polyp aria obtained from 

 the Eocene Tertiary Formation of North America. 



The following is a list of these corals : — 



1. Ocellaria ramosa Lonsdale, (sp. n.) 



2. Elabellum ? cuneiforme I^onsdale. (Anthophyllum cuneiforme 

 Conrad. MS. label.) 



3. Endopachys alatum Lonsdale, (sp. n.) 



4. Dendrophyllia laevis Lonsdale, (sp. n.) 



5. Dendrophyllia ? 



6. Cladocora (?) recrescens Lonsdale, (sp. n.) 



7. Caryophyllia subdichotoma Lonsdale, (sp. n.) 



8. Madrepora tubulata(?) Lonsdale. (Astrea tubulata De 

 France.) 



9. Porites. 



10. Tubulipora proboscidea (?) Lonsdale. (Pustulopora probos- 

 cidea(?) Milne Edwards.) 



11. Tubulipora. 



vol. i. M M 



