354 Mr. A. Bell un the Crag-Fauna. 



render the identification of the fossil with the recent shell 

 an easy matter. A. LyaJlii has been considered a variety 

 of X, "{JohholdicBj altered by time, distance, and physical 

 conditions ; but, as the latter shell is a present inhabitant 

 of the Japanese seas {X. insigm's, Gould, Otia Conchol. 

 p. 175), there are reasonable grounds for separating the 

 two into distinct species, the more so as they diifer in 

 some important particulars from each other. I quote Dr. 

 Baird's remarks : — 



" This species differs from it (/. e. X. CobboMice) in 

 being less transversely ovate, in ha\ang the beaks more 

 prominent, the posterior row in the hinge fewer in num- 

 ber, and in the costatious being stronger in proportion to 

 the size of the shell, and much fewer in number." 



They also differ in the size of the adult shell, in sculp- 

 tm'e, structure, and tumidity. 



For the opportunity of examining the recent shells I have 

 to thank Sir Charles Lyell and Mr, Jeffreys. The fossil 

 X. LyriUii occurs at Butley, and the recent shell in 8-12 

 fathoms at Vancouver's Island, 

 '"Scacchia elUptica, Scacchi (Philippi, En. Moll. Sic. t. xiv. 

 f. 8). R. C. Butley. The Kellia dliptica of the Mon. 

 Crag Moll. vol. ii, 1. 12. f, 13, does not appear to me to be 

 the same shell as Scacchi's. 



Astarte graciUsjXloodi (non Miinst,). Di-. Weichmann in- 

 fonns me that the English and Gennan shells are not 

 identical. A. Galeotti, Nyst, corresponds to the Crag spe- 

 cies (see Mon, Crag Moll.), 



Tapes texturata^ Lam. A double specimen, nearly perfect. 

 R. C. Waldringfield, 



Donax ptolituSjVoii. N. C. Walton-Naze, Sutton. 



Glycirneris angiista^ ^yst. Norw. C. (Sir Charles Ly ell's 

 coll.). 



Pandora incequivalvis , var. ohtusa, Leach. C. C. Gedgrave. 



Gasteopoda. 



^ Cancellaria varicosa^ Broc. Conch, foss. Subap. t, 3, f, 8. 



C, C, Gedgrave. R. C, Waldringfield. 

 * BoneUil, var, dertonensis^ Bellardi, Mon, Cane. Pie- 



monte, t, 3, f. 11, 12. C, C. Gedgrave. 



contorta, Bast. (Bellardi, Mon, Cane. t. 3. f. 7, 8). 



C. C. Gedgrave. 



{Columhella) avara, Say (Gould, Inv. Mass. fig. 197). 



E. C. Waldringfield. This species belongs to the same 

 section {Mertca, Ad.) of the Cancellaridje as C. mitrceforrnisy 

 Broc, and C. Fischeriy H, Ad, 

 — costellifera, Sow. (6'. Com<Ao?<^«*, Jay, = Cmspa, Moll., 



