~ ,; Note* on certain Terrestrial JfoIIusca, 



form they resemble those of Coccoldba^ and must Iiave belonged 

 to some plant having much the habit of CI uvifera; but the 

 leaves of that plant are entire, and the nervation is quite dit- 

 ferent. One of the other species of Coccoloba, which grows in 

 the West [ndies, C. diversifolia, has leaves with a marginal 

 Berration, and a nervation more like that of the leaves before 

 ns, but both the margins and nerves are unlike. 



The leaves which I have designated by the name of PhyJr 

 lites Oupanioides, as it seems to me, should be generically united 

 with these. 



Formation and Locality. Miocene strata. Fort Union. 

 (Dr. Hayden.) 



II. Notes on certain Terbestrial Mollusca, with Descriptions 



of New Species. 



By Thomas Bland. 



(Continued from Vol. YIIL, j>. 170.) 



Bead April 37th, 186a 



Tin: genus OylindreUa (Pfeiffer, 1840), as generally accept- 

 ed, embraces a great number of species of very diverse forms, 

 belonging chiefly to the faunas of Mexico and the islands of 



Cuba, Haiti and Jamaica. With reference to the shell, the ani- 

 mal being little known, the genus has been placed in Helicida 



between /'"/'<' and ( 7-/ usllld. 



In L855, Schmidt {Stylommatophora) stated that CylindreUa 

 (Urocoptis) has ho jaw, and that the teeth resemble those of 

 Qlandina and Daudeba? , dia i but differ in having two teeth on 

 a common base. 



Morch in L859 {Malak. Blatt.'p. L09) proposed an arrange- 

 ment of the I'nl umiutin, the divisions characterize* I by the 



presence and form, or absence of jaw, — one of such divisions 



