280 A MANUAL OF AMERICAN LAND SHELLS. 



Stenotrema inaxillatiim, Gould. 



Shell imperforate, globose-conic, rather solid, completely covered with 



Fig. 296. sliort hairs, chestnut-colored; spire convex-conoid, apex ob- 



^^fik^ tuse; whorls 5, ratljcr convex, gradaally increasing, the last 



^pfi^^ anteriorly deflected, constricted, subinflated below; aperture 



^•iiii^ oblique, linear, almost closed by a broad, jaw-shaped denti- 



s.maxiUatum. clc withiu the peristome; peristome thickened, its termina- 

 tions joined by a stout, erect parietal callus, the right margin subrecti- 

 liuear, arched, angularly merging into the very heavy basal margin; 

 within the base of the shell is a transverse tubercle. Greater diam- 

 eter 7, lesser C'"" ; height, 5""". 



Melix maxillata, Gould, Proc. Bost. Soc, iii, 38; in Terr. Moll., ii, 157, pi. xl, a, fig. 



2.— Pfeifker, Mon. Hel. Viv., iii, 126; iv, 164.— W. G. Binney, Terr. Moll., 



iv, 65; L. ife Fr.-W. Sh., i, 119 (1869). 

 Stenotrema maxillata, Tryon, Am. Journ. Conch., iii, 57 (1867).— W. G. BiNNEY, Terr. 



Moll., V, 297 {maxillatum). 



Tennessee, Alabama, Georgia (near Columbus). A species of the 

 Cumberland Subregion. 



This is another interesting example of the gradual transition, by al- 

 most imperceptible modifications, from one species to another, and of 

 the many changes which are wrought by the varied combination of a 

 few characters signalizing a group. However great its general resem- 

 blance to S. hirsutum may be, this species is decidedly characterized by 

 the singular jaw-like plate within the fauces. 



Animal unobserved. 



Stenotrema monodoii, Rackett. 



Shell imperforate or umbilicated, globose-depressed, diaphanous, 

 _, „„- reddish horn colored, covered with short 



Fig. 297.* i<IG. -J'JS. Fig. 299.t 



hairs ; spire rather convex : whorls 5i, the 



& 



upper ones flattened, the two last convex, 

 Zaii. ^^^- Ser. the last anteriorly gibbous, constricted at 

 num. ^i^g aperture ; umbilicus more or less opened 

 or completely closed ; aperture widely lunar, somewhat narrowed by a 

 lamelliform tooth on the parietal wall ; peristome acute, reflected, thick- 

 ened with white callus within; a transverse internal tubercle on the 

 base of the shell. Greater diameter 11, lesser 10""" ; height, 6""". 



* The specimen figured is abnormal in not having a parietal tooth, 

 t The hirsute character of the shell is not shown in the figure. 



