often intergrading with it. It has not as yet been reported 
from any of the eastern counties. ‘‘ Rare in Kent county,” 
Streng. 
64. PyRAMIDULA SOLITARIA (Say). 
Rare in the southeastern part of the state, but apparently 
more abundant in Kent county, the only locality reported from 
the west. ‘‘ Formerly abundant but getting scarce in Kent 
county,” Streng. 
64a. PyRAMIDULA SOLITARIA ALBINA (W. G. Binn.) 
Kent county. 
65. PyRAMIDULA PERSPECTIVA (Say). 
Generally distributed from the Saginaw-Grand, valley, 
south. ‘‘ Plentiful in some localities in Kent county,” Streng. 
66. PYRAMIDULA STRIATELLA (Anth. ) 
Very common and of general distribution. 
66a. PYRAMIDULA STRIATELLA ALBA. 
Greenish white, otherwise similar to the typical form. 
Mackinac Island. I have an impression, which I have not 
been able to verify, that this form was described by some one 
several years ago. 
67. PYRAMIDULA ASTERIScUS (Mse. ) 
Charlevoix. 
68. HEkLICODISCUS LINEATUS (Say). 
Common and of general distribution. 
69. PunctumM pyGMaium (Drap.) 
The returns indicate a general distribution. ‘‘ Rare in 
Kent county,” Streng. 
70. SPHYRADIUM EDENTULUM ( Drap. ) 
Apparently of general distribution, though not abundant. 
71. SuUCCINEA RETUSA Lea. 
The use of this name for the form heretofore commonly 
known as 5S. ovalis Gld. is correct, provided that all the 
inquiry, as to what Say’s Swccinea ovalis really was, has been 
foreclosed. Szcctnea ovalis Gid. clearly has no standing 
under the rules of nomenclature. If the question were an 
open one and was to be decided from Say’s description alone, 
the decision of Gould (Inv. Mass. 1st Ed.) referring it to this 
22 
