Famihj BELLEKOPHONTIDiE. 



Genus Bellerophon, De Montfort, 1808. 



(Conch. Systematique, I., p. 51.) 



Bellerophon ckesswelli, sj). nov. 



(PI. xix., tigs. 6-8.) 



Sj). Char. — Shell globular, but little compressed at the sides, 

 cariuate, the mouth expanded, moi'e so transversely than vertically. 

 Whorls five or six, the inner concealed by the body whorl, which 

 expands rapidly. Mouth rhomboidal ; outer lip rather thickened 

 above, increasing at the sides, the thickened edge rounded or 

 bevelled slightly outwards ; inner lip much reflected, forming a 

 deep callosity ; band raised and flattened, narrow, bordered by 

 fine keels ; sinus long and narrow, rendering the outer lip slightly 

 emarginate in the middle line ; umbilicus probably a little open. 

 Sculpture of irregular, fine, transverse laminae of growth, but 

 without spiral lines, and in conse(}uence the surface unfenestrate. 



Ohs. — A Bellerophun without specific name is recorded by Mr. 

 Cresswell, and I find much pleasure, theiefore, in associating his 

 name with this shell. JJ. cresstrelli resembles in general form 

 and sculpture />'. squamosus, Lindstrcim,* from theWenlock rocks 

 of Gotland, but ditt'ers from that species in the outline of the 

 mouth, the lips less reflected, the sculpture is finer, and the 

 surface unfenestrate. 



A MUCH-THICKENED VARIETY OF BULIMUS BIVARI- 



COSUS, GASKOIN, FROM LORD HOWE ISLAND. 



By R. Etheridge, Junk., 



(Palaeontologist to the Australian Museum, and Palseontologist 



and Librarian, Dept. of Mines, Sydney.] 



(Plate XX.) 



In the general Zoology of Lord Howe Island,! I applied the 

 varietal name solida to a peculiar form of Buliraus bicaricosus, 

 Gaskoin, one of the most characteristic species in the land mol- 

 luscan fauna of the island in question. In the living state, there 

 are already known two well marked varieties Brdimus cunicul- 

 instdff, Cox, 1: and B. eiheridfjei, Brazier,>; the former being less in 

 size, the latter with a much thinner shell than the species in chief. 



* Sil. Gastropoda and Pteropoda of Gotland, 1884, p. 78, t. 5, f. 17 - 24. 

 t Lord Howe Island, Its Zoology, Geology, and Physical Characters, 

 Mem. Anstr. Miis., No. 2, 1889, p. 27. 

 I Proc. Zool. Soc, 1872, p. 19, t. 4, f. 3. 

 § Lord Howe Island, loc. cil., t. 5, f. 1, 2, 7, 8. 



