PULMONATA HELIOIDAE HELICODISCUS LINKATDS. 



929 



Subfamily IIELICINAE. 



Genus STENOTREMA, Raf. 

 STENCTREMA MONODON, Rackett. 



Helix monodon, RACKETT. Linn. Trans., xiii, 1822, 42, pi. v, f. 2. Id., ed. Chenu., 2G9, pi. 

 xxvii, f. 5. WOOD, Ind., suppl., 1828, pi. vii, f. 15 ; ed. Hanley, 220, f. 15. 

 BINNEY, Bost, Jour. Nat. Hist., iii, 1840, 360, pi. x. f. 1. Id., Terr. Moll., ii, 

 147, pi. xli, lower fig. GOULD. Inverteb., 1841, 174, f. 113. ADAMS, Verm. 

 Moll., 1842, 159. W. G. BINNEY, Terr. Moll., iv, 60. DEKAY, N. Y. 

 Moll., 1843, 35 (pt, excl. syn.), pi. iii, f. 19 (not f. 21 a, b). MRS. GRAY, Fig. 

 Moll. An., pi. cxciii, f. 11 (ex Bost. Jour. Nat. Hist., no descr.). BILLINGS 

 Canadian Nat., ii, 1857, 100, f. 6. MOUSE, AID. Nat,, i, 1867, 151, figs. 12, 

 13. PFEIFFER, Mon. Hel. Viv., iv, 320. 



Helix convexa, CHEMNITZ, part. (excl. syn. et tab. Ixvi, f. 24-27), pi. x, figs. 17, 18. 

 PPEIFFER, Mon. Hel. Viv., iii, 268 (excl. ft et ?). DESHAYES, in Lain., viii, 

 112 ; 3d ed., iii, 308. Id., Encycl. M6th., ii, 1830, 253. Id, in Fer., 1. c., i, 

 144. REEVE, Con. Icon., 1852, G96 (excl. syn., no., 1854, 717). 



Uclicodonta hirsuta, a, FERXJSSAC, Tab. Syst., 101 (no desc.). 



Stenotrema monodon, MORSE, Jour. Port. Soc., i, 1864, 10, f. 13 ; pi. ii, f. 2 ; pi. iv, f. 14. 

 TKYON, Am. Jour. Conch., iii, 1867, 56, pi. ix, figs. 18, 20. 



Helix monodon var. cincta, LEWIS, Proc. Acad. Nat. Sci. Phila., 1874. (This last var. is 

 of unusually compressed form, with a very wide umbilicus, peritreme sub- 

 cariuate, and often exhibiting a peripheral brown baud like the banded 

 var. of H. elevata. Found in North Carolina.) 



Throughout entire North America, as are also its varieties, viz, var. 

 fraterna, Say, and var. Icaii, Ward. 



Genus HELICODISCUS. 

 1IELICODISCUS LINEATUS, Say. 



Helix lineata, SAY, Jour. Acad. Nat. Sci. Phila., i, 1817, 18; ii, 1824. 273. NIGH., Encycl., 

 3d ed., iv, 1819. SAY, Conch., Binney's ed., 7, 24. BINNEY, Bost. Jour. 

 Nat, Hist., iii, 1840, 436. pi. xxii, f. 6. Id., Terr. Moll., ii, 261, pi. 

 xlviii, f. 1. DEKAY, K Y. Moll., 1843, 44. GOULD, 'Invert., 1841, 179, f. 

 103. ADAMS, Ver., Moll., 1842, 161. FERUSSAC, Tab. Syst., 44. Id., Hist., 

 pi. Ixxix, f. 1. DESHAYES, in Fer., i, SO. CHEMNITZ, 2d ed., ii, 203, tab. 

 ci, figs. 13-15. PFEIFFER, Mon. Hel. Viv., i, 184. REEVE, Con. Icon., 

 1852, 724. VV. G. BINNEY, Terr. Moll., iv, 123. MORSE, Am. Nat., i, 1867, 

 546, f. 44. 

 59 z 



