CERIOPORID^E. 123 



thickened, annular, quadrificl border ; ostioles depressed, foveolate, about 5 around 

 each orifice ; interstitial tubes nearly as large as the cells, moniliform, not punctured. 



HETEROPOEA TOIITILIS (?), Lonsdale, \. c., p. 500, with fig. 

 MULTIZONOPORA RAMOSA (?), D'Orb/yny, Terr. Cret., pi. ncclxxii, figs. 1, 3. 

 HETEROPORA INTRICATA (??), Mich., 1. c., p. 320, pi. Ixxv, fig. 6. 

 ENTALOPHORA IRIIEGULARIS (I), D'Orbiyny, 1. c., pi. Dcxvii. 

 HETEROPORA DICHOTOMA, S. W., MS. 



Habitat. Sutton ; S. Wood; J. iS. B.; (?) Cretaceous and Oolite, D' Or bigny and 

 Michelin. 



Of the above synonyms those which appear the most likely to prove correct are 

 Heteropora tort'tlis, Lonsdale, and Afultisonopora ramosa, D'Orbigny, which probably 

 corresponds with his Entalopliora irregularis, but is clearly not the same as H. 

 ramosa of Michelin. The specific name consequently could not be adopted, even were 

 the identity of his form with the Crag fossil satisfactorily established. All that need be 

 remarked respecting it is that the representation of the natural size of M. ramosa given 

 by M. D'Orbigny suits very exactly to H. pustulosa, and that there is nothing in his 

 diagrammatic, magnified figure against the supposition that they may be the same. 



With respect to H. tortilis of Mr. Lonsdale, it may be remarked that his excellent 

 account and very intelligible figures show that the two forms are at any rate closely 

 allied. The geological position also of //. tortilis is an additional argument in favour of its 

 correspondence with the Crag fossil. The chief difference seems to exist in the absence in 

 H. tortilis of the peculiar annular thickening of the mouths of the cells in the better 

 preserved portions of the specimens which forms a striking character in //. pustulosa, and 

 which, had it existed in his species, could hardly not have escaped the observant eye 

 of Mr. Lonsdale, who, on the contrary, expressly says of the American species that the 

 edges of the larger orifices are " sharp." 



2. HETEROPORA CLAVATA, GohJ/uss (sp.) PI. XIX, fig. 7. 



Polyzoario simplici, clavato, inferne valde attenuato. Superficie cancellata. Cellularum 

 orificiis orbicularibus, simplicibus, superficie rcquatis vel depressis, ostiolis quinque magnis 

 circumcinctis. 



Polyzoarium simple, club-shaped, much attenuated at the base ; surface cancellous ; 

 cell-orifices circular, simple, level or depressed; ostioles large, about 5 around each 

 cell-orifice. 



CKRIOPORA CLAVATA, Goldfuss, Petr. Germ., p. 36, pi. x, fig. 15. 



HETEROPORA ANAMOLOPORA, Reuss, Foss. Polyp., d. W., T. B., p. .'i-i, pi. v, figs. 17, 18 (not 



Hag.). 

 CERIOPORA THELEOIDEA (?), Hag., Maast. Kreideb., p. 52, pi. v, fig. 5. 



