PULMONATA—HELICIDAE— HELICODISCUS LINEATUS. 920 



Subfamily HELICINAE. 



Genus STENOTREMA-, Raf. 

 STENCTEEMA MONODON, Eackett. 



Helix monodon, Eackett. Linn. Trans., xiii, 1822, 42, pi. v, f. 2. — Id., e«l. Ctaenu., 209, pi. 

 xxvii, f. 5. — Wood, Ind., suppl., 1S2S, pi. vii, f. 15 ; ed. Hanley, 220, f. 15. — 

 Binney, Bost, Jour. Nat. Hist., iii, 1S40, 300, pi. x, f. l.—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, 00.— 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. 0.— Morse, Am. Nat., i, 1807, 151, figs. 12, 

 13.— Pfeiffer, Mon. Hel. Viv., iv, 320. 



Helix convexa, Chemnitz, part. (excl. syn. et tab. lxvi, f. 24-27), pi. x, figs. 17, IS. — 

 Pfeiffer, Mon. Hel. Viv., iii, 20S (excl. /S et r). — Deshayes, in Lam., viii, 

 112 ; 3d ed., iii, 30S.— Id,, Encycl. Meth., ii, 1S30, 253.— Id,, in Fer., 1. c, i, 

 144. — Eeeye, Con. Icon., 1852, GOO (excl. syn., no., 1854, 717). 



Eelicodonta hirsuta, a, Eertjssac, Tab. Syst., 101 (no desc). 



Stenotrema monodon, Morse, Jour. Port. Soc, i, 1804, 10, f. 13 ; pi. ii, f. 2 ; pi. iv, f. 14. — 

 Tryon, Am. Jour. Concb., iii, 1867, 56, pi. ix, figs. 18, 20. 



Helix monodon var. cincta, Lewis, Proc. Acad. Nat. Sci. Pbila., 1874. (This last var. is 

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

 cariuate, and often exhibiting a peripheral brown band 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. leaii, Ward. 



No. 



-Locality. 



Date. Collector. 

 1 



V13 





July, 1S74 John Yarrow. 





Genus HELICODISCUS. 



HELICODISCUS LINEATUS, Say. 



Helix lineata, Say, Jour. Acad. Nat. Sci. Phila., i, 1817, 18; ii, 1824, 273. — Nich., Encycl., 

 3d ed., iv, 1819. — Say, Conch., Biuney's ed., 7, 24. — Binney, Bost. Jour. 

 Nat. Hist,, iii, 1840, 430, pi. xxii, f. 0.— Id,, Terr. Moll., ii, 201, pi. 

 xlviii, f. 1.— DeKay, N. Y. Moll., 1843, 44.— Gould, Invert., 1841, 179, f. 

 103.— ADAMS, Ver., Moll., 1842, 101.— Ferussac, Tab. Syst., 44.— Id., Hist., 

 pi. lxxix, f. 1. — Deshayes, in Fer., i, 80. — Chemnitz, 2d ed., ii, 203, tab. 

 ci, figs. 13-15. — Pfeiffer, Mon. Hel. Viv., i, 184.— Eeeve, Con. Icon., 

 1852, 724.— W. G. Binney, Terr. Moll., iv, 123.— Morse, Am. Nat., i, 1807, 

 546, f. 44. 

 59 z 



