EASTERN PROVINCE — INTERIOR REGION SPECIES. 205 



The geuus Zonites being very numerous in species, it will be conven- 

 ient to group the species in several subgenera, founded on the form of 



the shell. 



Subgenus MESOMPHIX, Raf. 



Shell umbilicated or perforated, globosely depressed, thin, striated, 

 reddish horn-color, lighter below, shining; whorls 4^-6; aperture 

 lunar-ovate; i)eristome simple, straight, acute, extremities approach- 

 ing, that of the columella subreflexed. 



Animal (of Z. fuliginosus) nearly twice as long as the diameter of 

 the shell, blackish or bluish-black, darkest. on the head, neck, and eye- 

 peduncles. Eye-peduncles short in proportion to the length of the 

 animal, and set widely apart. Respiratory foramen in the angle 

 formed by the junction of the peristome with the body-whorl. Base 

 of foot whitish, the locomotive band defined by two very fine lines or 

 furrows. A double marginal furrow runs along the side of the foot 

 from the head nearly to the posterior extremity, where it passes up- 

 ward and joins that from the opposite side, leaving posteriorly a 

 flattened, rounded extremity, somewhat prominent and glandular. 

 Upon the center of the extremity is a longitudinal fissure or sinus, 

 which is sometimes expanded and at other times closed and invisible. 

 Secretion of mucus from the extremity profuse. 



Zonites capuodes, W. G. Binney. 



Shell depressed, horn-colored or smoky, globose, wrinkled, below 

 smooth ; si)ire short, depressed ; suture mod- ^ig- 215. 



erate; whorls 5, rapidly increasing, the last 

 very ventricose and large, sometimes marked 

 with coarse revolving lines; aperture large, 

 round; peristome simple, acute, ends ap- 

 proached, joined by a slight deposition of 

 brownish callus over the jjarietal wall, reflected zonites capiwdes. 



at the small and deep umbilicus. Greater diameter 35, lesser 28™™ ; 

 height, 13™™. 



Helix Icopnodes, W. G. Binney, Proc. Acad. Nat. Sci. Philad., 1857, 186; Terr. Moll., 

 iv, 104, 1)1. Ixxx, fig. 14.— Pfeiffer, Mou. Hel. Viv., iv, 346. 



Hyalina Icopnodes, Tryon, Am. Journ. Conch., ii, 248 (1866). , 



Zonites kojniodes, W. G. Binney, L. & Fr.-W. Sli., i, 284 (1869) (excl. fig. 508 = Iwvi- 

 gaius). 



Zonites capnodes,'^. G. Binney, Terr. Moll., v, 98. 



It may be said to belong to the Cumberland Subregion, though it 

 has spread into the adjoining- subregion. I have actually received it 



