﻿43^ ~ [ITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 47 



and the reflected peristome rather large. The peristome is rounded 

 and well reflected, the parietal lamina strong-, that on the pillar 

 feeble or hardly perceptible. 



Height of 



Shell. Aperture. Max. Diameter. 



Long Cay 29.0 10.0 15 mm. 



35-5 ii-o 14.5 " 



Mangrove Cay : n. 14.0 " 



The shell is near C. g gulum Maynard. but is shorter and 



stouter, more cylindrical, with coarser, less regular, fewer and more 

 widely spaced ribs. 



Only a few specimens were obtained by Mr. Bryant, those of Mr. 

 \<>rthrop were better preserved. U. S. Xat. Mus.. Xo. 120.008. 

 tenon (StropJiiops) waflingense new species. PI. lviii. fig. 7. 



Shell small, plump, attenuated before and behind, yellowish white 

 with occasional brown mottlings chiefly between the whitish ribs : 

 peristome yellowish with a brown flush deep in the throat. There 

 are about two brownish smooth nuclear and eight subsequent ribbed 

 whorls ; the ribs are nearly vertical, close set with slightly wider 

 regular interspaces, the ribs are of full strength immediately in front 

 of the suture and over the base of the adult : the apex is attenuated 

 in an even curve, the last whorl is more slender than its predecessor, 

 toward the aperture it rises suddenly so that the posterior angle of 

 the aperture is considerably above the middle of the whorl. There 

 are about 28-30 ribs on the penultimate whorl, and no traces of 

 spiral sculpture. The peristome is simple, moderately thickened and 

 reflected, with a thin callus on the body : the parietal fold is strong 

 and short, the axial fold feeble from in front but within well defined : 

 the umbilicus is closed. The size of the eleven specimens collected 

 is unusually uniform. 



Height. Aperture. Max Diameter. 



25 9 10 mm. 



12 7.5 10 " 



are the extreme measurements. 



X" Cerion has yet been noted from Watling Island, a mention of 

 C. glans in my " Wild Duck '" report having been due to an error. 

 This and the following species are therefore the first positively known 

 to come from that island. Though not found by Mr. Bryant, the 

 existence of several unnamed forms was first realized on making an 

 attempt to identify some of his specie-. A.S this seems a suitable 

 place for the descriptions they are included. U. S. Xat. Mus.. Xo. 

 132.970. 



