EASTERN PROVINCE INTERIOR REGION SPECIES. 297 



to find such a difference in the same lienns as the presence and absence 

 of side cutting points on the central nnd first hiteral teeth. 

 Mesodoii majoiN Binney. 



Sliell imperforate, conoidly subglobose, solid, with crowded, fold-like 

 striai and a few interstitial, microscopic re- nc sis. 



volving lines, reddish horn-color or chest- 

 nut; spire conoid, the apical point small 5 

 whorls G, convex, the last ventricose, scarcely 

 descending in front; aperture diagonal, ^^^ 

 roundly lunate, whitish within; peristome 

 with a white thiclvening, its terminations 

 joined by a thin callus, the right and basal 

 portions rather broadly expanding and re- M.major. 



fleeted, the columellar portion subdeutate, dilated, subexcavated, ad- 

 hering. Greater diameter 37^, lesser .31"'"' ; height, 20°^™. 



Helix major, Binney, Bost. Joiiru. Nat. Hist., i, 473, pl.xii (l'-37); Terr. Moll., ii, 96, 

 pi. i.— De Kay, N. Y. Moll., 4.') ( 1843). — Mrs. Gkay, Fig. of Moll. An., pi. ccxci, 

 fig. 1, from Bost. Jonrn., no descr. — W. G. Bixney, Terr. Moll., iv, 43; L. «fe 

 Fr.-W. Sh., i, 135 (1869).— Pfeiffer, Mon. Hel. A^iv., iv,3-,0. 



Helix allolalris,\ar., F^eussac, Hist., pi. xliii, fig. 4; pl.slvi, a, fig. 7. — Deshayes, 

 in Fer., part. — Pfeiffer, SyniLolcT, ii, 22; Mon.Hel.Tiv., i, 290; in Chem- 

 nitz, ed.2, i, 81.— Reeve, Con. Icon., 656.— Bl-.nd, N. Y. Lye, vi, 359. 



Mesodon major, Tryon, Amer. Jonrn. Couch., lii, 43 (1867). — W. G. Binney, Terr. 

 Moil., Y, 316. 



This form seems to inhabit a narrow strip of territoiy east of the 

 mountains from Abbeville, S. C, to the Gulf of Slexico. At Aiken, 

 S. C, it is well marked ; more so at IMacon, Columbus, and Butler, Ga, 

 Dr. Binne}^ ibund it in West Florida. It is common in the City 

 Cemetery of Macon, Ga. Also from mountains dividing North Caro- 

 lina from Tennessee. 



It is much more globose than alholahris, of a coarser and more solid 

 texture, and the striae of increase are much more raised and prominent, 

 so much so, indeed, as to leave distinct grooves between them. The 

 revolving strife, so distinct on that shell, are either wanting or very 

 indistinct. The aperture is smaller in proportion to the size of the 

 shell, less flattened towards the plane of the base, and more rounded. 

 The parietal wall and umbilicus are in many instances covered with a 

 smooth and shining, semitrausi)arent, testaceous callus, and in oue 

 specimen in my cabinet bears a well-developed tooth. The margin of 

 the peristome is thickened, the peristome itself is i^arrower, less ab- 

 ruptly reflected, and n.ot so much flattened, and there is often a tooth- 

 like process on the inner and upi^er side of the margin near the umbil- 



