ZONITES. 163 



H. PLACENTULA, Skuttlewortli. PI. 51, figs. 26, 27. 



Rather widely umbilicated, somewhat depressed, very shining, 

 with irregular distant impressed stride, diaphanous, horn-colored ; 

 whorls 7, narrow, gradually increasing, scarcely convex, the last 

 convex below, subexcavated around the umbilicus. 

 Diam. 7*5 mill. 



Mts. of E. Tennessee, Kentucky, Lexington, Va., 



Hot Springs, Arkansas. 



II. LAWI, W. G. Binney. PL 51, figs. 28, 29. 



Until recently confounded by Mr. Binney with H. placentula ; 

 he distinguishes it as larger, more deeply and widely umbilicated, 

 and with a more elevated spire. Diam. 9 mill. 



Mts. of East Tennessee. 



-u** West Indian Species. 



II. EFFUSA, PIT. PI. 51, figs. 30-32. 



Narrowly perforate, rather thin, closely lightly striated, liyaline- 

 white, spire a little convex, suture deeply impressed ; whorls 6, 

 rather narrow, slowly increasing, the last not descending, base 

 inflated, smoother; aperture subvertical, irregularly lunar, at the 

 base of the columella effused. Diam. 1T5 mill. 



Haiti. 

 Yar. MAJOR, Weinland. Diam. 15 mill. 



H. INCISA, Pfr. PL 51, figs. 33-35. 



Scarcely perforate, depressed, subdiscoidal, rather thin, shin- 

 ing, greenish-corneous, spire plane, apex minute, suture impressed ; 

 whorls 4-J, flattened, rapidly increasing, subdistantly striate, closer 

 towards the aperture, aperture obliquely lunar. Diam. 8*6 mill. 



Ins. Barbados. 

 H. ALBICANS, Pfr. PL 51, figs. 36-38. 



Narrowly perforate, striulate, nearly smooth, shining, Iryaline- 

 white ; spire but little elevated, suture impressed, margined; 

 whorls 5, rather plane, slowly increasing, the last not descending, 

 subrounded, impressed around the perforation, aperture vertical, 

 widely lunar. Diam. 8 mill. 



Jamaica. 



