264 A MANUAL OF AMERICAN LAND SHELLS. 



S. Hubhardi, a specimen from Bonaventure Cemetery, near Savannah, 

 kindly opened by Mr. Bland, furnished a jaw and lingual membrane. 

 Jaw long, low, slightly arcuate, ends acuminated; no median projec- 

 tion to cutting edge; anterior surface with numerous crowded ribs, 

 deuticulating either margin. Lingual membrane with 14-1-14 teeth, 

 o laterals. All the teeth like those of 8. lahyrinthica (Terr. Moll., V, 

 Plate V, Fig. N). 



There are no known species foreign to North America with which to 

 compare the dentition and jaw of lahyrinthica and Hubbardi. 



Strobila labyrintliica, Say. 



Shell umbilicated, globose-conic, brownish horn-color, with stout ribs 



,g^ above, and below lighter, witli arborescent wrinkles ; spire 



^^^tn^ obtuse ; umbilicus narrow, pervious ; aperture scarcely ob- 



iMv > liqae, lunately rounded; peristome briefly reflected, thick- 



"^^^^s^' ened ; ijarietal wall with three revolving, deeply entering, 



S. lahyrinthica, 



enlarged, parallel lamiL'a', the central further within the aperture and 

 less de^'eloped, and around the axis one stout, lamella-like rib, not 

 reaching the columella ; on the base of the outer whorl are two short, 

 deeply seated, internal, revolving, rib-like lamina3. Greater diameter, 

 2^™" ; height, 11'"'". 



Helix lahyrinthica, Say, Jourii. Hiila. Acad., i, 124 ^817) ; Nich. Encycl., ed, 3, iv (1819); 

 ed. BiNNKY, 10. — BiNNEY, Bost. Journ. Nat. Hist., iii, 393, pi. xxvi, fig. 1 

 (1837); Terr. Moll., ii,20-2,i)l. xvli, fig. 3.— GouLD, Invertebrata, 184, fig. 106 

 (1841).— Adams, Veraiont IMollusca, 160 (1842).— Ferussac, Tab. Syst., 38; 

 Hist., pi. li, B, fig. 1.— Pfeiffer, Symbolic, ii, 31; Mon. Hel. Viv.,i, 416. — 

 Chemnitz, ed. 2, i, 38^ t. Ixvi, figs. 17-20.— Eeeve, Con. Icon., No. 728 

 (1852).— De Kay,N. Y. Moll., 39, pi. iii, fig. 31 (1842).-Deshayes, in FER.,i, 

 210.— W. G. BiNNEY,Terr. Mo]l.,iv, 95 : L. & Fr.-W. Sli.,i, 84 (1869).— 

 MOKSE, Anier. Nat., i, 545, figs. 41, 42 (1867).— Gould and Binney, Iuv. of 

 Mass.,ed. 2,415 (1870). 



Strobila lahyrinthica, Morse, Journ. Portl. Soc, i, 26, figs. 64-67, pi. ii,fig. 12, a, &; pi. 

 viii, fig. 68 (1864).— Tkyon, Am. Journ. Concli., ii,259 (1866).— W. G. Binney, 

 Terr. Moll., v, 259. 



A Post-Pliocene* species, now found over all of the Eastern Prov- 

 ince. It may perhaps also have been noticed in Mexico, under the 



* Woodward (Man., 384) refers an extinct English Eocene Helix to this species. I 

 have seen no specimens (f it. Mr. Bland -writes me that he has received from France 

 a fossil shell, under the name of H. labyrinthicida, apparently identical with our 

 species. 



Whiteaves (Can. Nat., vii, 56) says H. lahyrinthica has been found in Upper Eocene 

 at Headon Hill, Isle of Wight, and in the Paris basin. 



