MUSEUM OF COMPARATIVE ZOOLOGY. 121 



hive"' (Bieuenkorb) as the vernacular name of his genus. There is in this case a 

 descriptive phrase, as well as a name and references to other authors ; because 

 the genus was divided into two sections by Bolten, one with entire spire, the 

 other (corresponding to Rumina decoUata) having it truncate. As there is no 

 doubt whatever as to the pertinency of Bolten's name, I think we must adopt 

 it. In 1850, Albers named his genus Strophia, not designating a type, but 

 putting S. decumnna ¥6r. first, which was soon after named a&.type by Herr- 

 mannsen in the Supplement to his " Index." The name Strophia is, however, 

 preoccupied in entomology. In the year 1850, Mdrch (Yoldi Cat., p. 63) revived 

 Cerion, with uva as first species. In 1889, Maynard,* who was working on 

 this group, announced that it was divisible into four sections, as below, which, 

 however, he refrained from naming. 



The examination of a large number of specimens convinced him of the value 

 of the characters mentioned, and the full credit of the discovery certainly be- 

 longs to him, though, for various reasons, his papers received comparatively 

 little attention. 



I have sectionized a large number of species, and, so far as my material- goes, 

 find Maynard's observations confirmed. The differences he referred to are 

 certainly very constant, much more so in the fully mature sliell than any of 

 the external characters. The genus may therefore be arranged as follows ; — 



Genus CERION Bolten, 1799. 



Type Turbo uva Linne, Gmelin. 



Subgenus CERION s. s. 



Shell with the parietal lamina situated in the angle between the pillar and 

 the body whorl, short, extending but a short distance into the whorl before 

 becoming obsolete ; the axial lamina obscure or absent at the aperture, becom- 

 ing stronger within and continuing to encircle the axis for some distance up 

 the spire ; within the spire sets of laminae persist, sometimes three or more, 

 consisting of two short laminae on the dorsal, and one longer on the ventral 

 surface of the whorls. Whorls compressed in the direction of the axis, numer- 

 ous. Type Turbo uva Linne, Curagao. (Figure 3.) 



Subgenus STROPHIOPS Dall, 1894. 



Strophia Albers, 1850, not of Meigen, Syst. Beschr., III. 147, 1832 (Lepidoptera). 



Shell with the parietal lamina penetrating the body whorl to one third, one 

 half, or more of its length ; situated midway between the pillar and the outer 



* Contributions to Science, Vol. I. No. 3, p. 130, Newtonville, Mass., the author, 

 Oct., 1889. 



