340 A MANUAL OF AMERICAN LAND SHELLS. 



From Fort Simpson, on Mackenzie River, to the Gulf of Mexico ; 

 overall the Eastern Province; also in Colorado and l*few Mexico, of 

 the Central Province. 



Head dark ; foot flesh-colored, narrow. 



A larger form is also found. 



This shell at first sight ap]>ears to be the young of some of the larger 

 species, but it has as many whorls as any of them, though not attain- 

 ing more than one-fourth j)art their size. It differs from all others in 

 having a long and pointed spire, and in its shorter aperture, which is 

 only half as long as the shell. The whorls do not expand so fast from 

 the apex towards the aperture, and the last whorl consequently forms a 

 much smaller part of the whole volume of the shell. One of its charac- 

 ters, but not entirely peculiar to it, is the loose manner in which the 

 whorls are united, the suture being in some intances so deep as nearly 

 to separate them. This variety was considered by Mr. Say to be a dis- 

 tinct species, and described by him under the name of Succinea vermeta. 

 We have carefully compared Siiccinea Wardiana, Lea, with the present 

 species, but cannot detect any difference. 



In the young shells the spire is not so prominent, and the periostraca 

 is covered with numerous fine, hairy poi cesses, as in some Helices, which 

 accumulate particles of dirt, which in this way sometimes coat over its 

 entire surface. The apex of the spire is often rosy. 



Found under stones and fragments of wood in moist places, and often 

 on hillsides and other positions far removed from water. 



Allied to S. j)w^>/s, var. ochracea, according to Mr. Gwynn Jeffreys 

 (Ann. Mag. Nat. Hist., 1872, 24G). 



Jaw strongly arcuate, ends curved and pointed, anterior surface 

 smooth; concave margin simple, with a well-developed, acute median 

 projection; convex margin waving (see p. 337, fig. 3GG). 



Lingual membrane (Terr. Moll., V, Plate X, Fig. K) with 21-1-21 

 teeth, with about 8 perfect laterals. Morse counted 19-1-19 teeth. 



Succiiiea aiirca, Lea. 



Shell very symmetrical in form, elongated-oval, the texture very 

 Fig. ^70 ^hiu and lucid and of a clear amber-color; whorls 3, the 

 suture deeply impressed and the whorls a little tabulated 

 posteriorly ; aperture narrow-ovate, acute posteriorly ; the 

 columella has an indistinct fold. Length, 7^""" ; breadth, 



