PATULA. 161 



Patula alternata, S>\Y. 

 Vol. III. VI XXV. 



Shell broadly utnbilicaU'd, orbicularly depri'ssed, tliin, pinoky horn-color 

 varied with rod, interrupted, oblicjiiely arran'j;ed |)at<'he3 and spots, ron<ih('ned 

 by crowded, elevated rib-like striic, smoother below; whorls 6^, flatteiK'd, the 

 last sometimes obtusely carinated at its peri[)hery ; umbilicus larj^e, pervious; 

 aperture very oblique, Innately rounded, banded within ; peristome simple, 

 acute, its terminations joined by a very thin, trans])arent callus, that of tho 

 columella sul)rcllected. Greater diameter 21, lesser I'J mill.; height, 10 mill. 



Ilc/ix aUcninta, Say, Nich. Encycl., PI. I. Fig. 2(1817-19); Journ. Philad. 



Acad., II. 161 (1821); Rinxey's ed. 6, 21, PI. LXIX. Fig. 2. — Katon, 



Zool. Text-nook, 193 (1826). — Binney, Best. Journ. Nat. Hist., III. 428, PI. 



XXV. (1840) ; Terr, iloll., II. 212, PI. XXV. — Gould, Invert., 177, Fig. 114 



(1841). — Lkidy, T. M. U. S., I. 253, PI. VII. Fig.s. 2-5(1851), anat. — 



DeKay, N. Y. Moll., 29, PI. II. Fig. 9 (1843). — Adams, Vermont Mollusca, 



162, Fig. (1842). — FitKU.s.sAC, Tab. Sy.st., 44 ; Hist., PI. LXXIX. Figs. 8-10. 



— PoTiEzand Michaud, Galerie, 104. —Chemnitz, 2ded., I. 181, Tab. XXIV. 



Figs. 17, 18. — Pfeiffek, Mon. Hel. Viv., I. 102. — Deshayes in FitR. Hist., 



I. 89. -Reeve, Con. Icon., 670 (1852). — Billings, Canad. Nat., II. 99, Figs. 



4, 5 (1857). —W. G. Binnm;y, Terr. Moll., IV. 98. — Bland, Ann. N. Y. 



Lye., VII. — MoKSE, Amer. Nat., 1. 187, Figs. 17, 18 (1867). — W. G. Binnet, 



L. & Fr.-W. Sh., I. 73 (1869). — Gould and Binney, Invert, of Mass., ed. 2, 



412 (1870). 

 Anguispira allernata, Morse, Journ. Portl. Soc, I. 11, Fig. 15 ; Pl. IV. Fig. 16 



(1864). — Tryon, Am. Journ. Conch., II. 261 (1866). 

 Helix acahra, Lamauck, Anim. sans Vert., VI. part 2, 88. — Deshayes, Encycl. 



Meth., II. 219 (1830); in Lamarck, VIII. QQ \ ed. 3, III. 292. — Chenu, 



111., PI. VI. Fig. 11. 

 Helix in/cda, Parreyss MS., Pfeiffer, Mal. Bl. 1857, 86 ; Mon. Hel. Viv., 



IV. 91, non Reeve. 

 Helix strongylodes, Pfeiffer, Proc. Zool. Soc. 1854, 53 ; Mon. Hel. Viv., IV. 



91. -Reeve, Con. Icon., No. 1296 (1854).— Vide^Y. G. Binney, Terr. Moll., 



IV. PI. LXXVII. Fig. 8. 

 Helix mordax, Shuttlew^orth, Bern. Mitt. 1853, 195. — Gould in Terr. Moll,, 



III. 19. — W. G. Binney, Terr. Moll., IV. 99. — Pfeiffeh, Mon. Hel. Viv., 



III. 635. — Bland, Ann. N. Y. Lye, VII. (and var. Fergusoni). 

 Helix dubia, Sheppard, Tr. Lit. Hist. Soc. Quebec, I. 194. — McCulloch 



(where ?), teste Binney, Terr. Moll., I. 192. 



It is commonly found in the Post-pleiocene of the Mississippi Valley, retain- 

 ing some of the color of the red flame-like patches. It now extends over the 

 whole of the Eastern Province as far north a.^ Labrador. 



Animal : head and eye-peduncles li;i;ht slate-(H)lor. back brown, remainder of 

 upper surface brownish-oranjie, eyes black, base of foot jirayi^h-white, colhir 

 saffron. Eye-peduncles one third of an inch long, blackish at the extremities. 



VOL. IV. 11 



