198 A MANUAL OF AMERICAN LAND SHELLS. 



Siiccinea Hig^giiisi, Bland. 



Shell depressed-oval, tbin, obliquely striated, pellucid, somewhat 



Fir.. 206. shining, pale horn-colored ; spire short, obtuse'; suture 



deep; whorls 3, convex, the last rather depressed; the 



columella scarcely arched, above conspicuously plicate; 



aperture angular!}' oval, frequently armed with a small, 



oblique, white tooth on the parietal wall; i^eristome 



simple, regularly arcuate. Length, 15; diameter, 17""" ; aperture, 11"™ 



long. 



Siiccinea BUiginsi, Bland, Am. Journ. Coiicb.,ii, 373, pi. xvii, fig. 24 (1866). — Tryon, 

 Am. Jouru. Couch., ii, 237 (1866).— W. G. Binney, L. & Fr.-W. Sh., i, 258 

 (1869); Terr. Moll., V, 418. 



Putin-Bay Island, Lake Erie; a species of the Northern Eegion. 



Animal not observed. 



This species is allied to S. Sallcana, Pfr., S. Baydeni, Binn., and 

 esi)Ocially to S. oralis, Gould, not Say. Comi»arod with the latter, the 

 last whorl is less convex, the aperture is more angular above, the 

 colnmelki less arcuate and more distinctly plicate. 



The measurements given are of one of the largest specimens. This 

 is the only North American species in which I have noticed the 

 parietal tooth mentioned in the description. Three of my specimens 

 have this tooth; it is lamelliform, about 1""" in length at the base, 

 the iiointed apex having an elevation of about ^"™. (Bland.) 



Siicciiica Tottciiiana, Lea. 



Shell obliquely ovate, of a greenish color, thin, shining, somewhat 



diaphanous, obsoletely striated ; whorls 3, convex, the last very large 



and globose; spire very short; suture impressed; aperture 



large, oval, oblique ; peristome thin, acute. Greatest length, 



le--". 



Siiccinea Tottcniana, Lea, Proc. Pliil. Soc, Ii, 32 (1841) ; Trans. Amer. Phil. 

 Soc, ix, 4 (1844); Obs., iv, 4.— Pfeiffer, Mou. HeL Viv., ii, 526; 

 iii, 15.— Gould, iu Terr. Moll., ii, 65, 72, pi. Ixvii, 6, fig. 2.— W. G. 

 Binney, Terr. Moll., iv, 35; v, 425; L. & Fr.-W. Sh., i, 266 

 (1869).— Morse, Jonrn. Portl. Soc, i, 29, fig. 73; pi. ix, fig. 74 

 (1864); Amer. Nat., i, 606, fig. 46 (1868).— Tryon, Amer. Jonrn. 

 Couch., ii, 230 (1866) -Gould and Binney, Inv. of Mass. (2), 448 

 (1870). 

 SuGcinea ohliqna, teste Binney, I. c. 



New England and New York ; in Interior and Northern Eegions. 

 Generally considered a variety of S. obliqna. It is a thinner <and 



