ZONITES. 199 



it from mullidentatus, which is still smaller than significant and 

 has a narrower umbilicus." -BiNNEY. 



H. HILLEI, Gundlach. PI. 60, figs. 29-31. 



Moderately umbilicated, depressed, thin, somewhat smooth, 

 whitish hyaline ; whorls 6, very narrow, suture deep, last whorl 

 obsoletely subangulated ; aperture with a more or less inter- 

 rupted spiral lamina on the base, and series of transverse irregu- 

 lar teeth. Diam. 4'5, alt. 2'5 mill. 



Cula. 

 H. BLANDII, Weinland. PI. 60, figs. 32, 33. 



Narrowly perforate, with narrower whorls, and more elevated 



than the last species. Diam. 4, alt. 3 mill. 



Haiti. 

 H. ENSIFERA, Mousson. PI. 60, fig. 34. 



Narrowly perforate, pellucid, horn-color, very shining ; whorls 

 4^ (?), somewhat flattened above, the last subangulate, more con- 

 vex below, narrowly impressed in the middle, suture scarcely 

 impressed, very narrowl} T margined ; aperture with two lamellae 

 within the outer wall, one submedian, the other smaller, basal, 

 or evanescent, columella plicately produced. Diam. 2 mill. 



Ins. Samoa. 



Section TENTRIDENS, Binney and Bland, 1869. 



H. GULARIS, Say. PI. 60, figs. 35-38. 



Subperforate, pale yellowish horn-color; whorls 7-8, narrow, 

 with curved close transverse wrinkles, suture impressed ; peris- 

 tome thin at the edge, thickened within with a white testaceous 

 deposit; base flattened, indented in the centre; yellowish white 

 and opaque near the aperture ; umbilicus small and rounded ;n 

 young shells, obsolete or diminished to a mere point in older 

 ones ; within the base of the aperture are one or two lamelliform, 

 elongated, nearly parallel teeth, one near the base, the other and 

 larger one exterior. Diam. 8 mill. 



Mts. of E. Tennessee, W. Virginia and Western Fenna., 



Sputhivards to N. Georgia and Alabama. 



Is a larger species, with one more whorl, higher spire and less 

 convex base, than the next; the nucleus also is smaller, so that 

 the first two whorls are finer and more delicate. It is H. 

 bicostata, Pfr. 



