102 THE NAUTILUS. 



Ferussada subcylindrica L. Two easily separated forms of this 

 species are found in the district ; one occurs everywhere and is 

 abundant, the other has only been taken in damp woods on the Isle 

 d'Orleans. aud is a larger shell. 



Succinea avara Say. Local. 



Succinea ovalis Gould. Not at all common. Both these species are 

 smaller in size as compared with specimens from western Ontario. 



Succinea obliqua Say. The ravine running into the St. Charles 

 River is a splendid place for this shell. During hibernation I have, on 

 several occasions, taken 200 fine specimens in a short time, and some 

 are the largest I have ever seen or captured. I am inclined to think 

 that some of them would pass for Succinea, totteniana Lea ; there 

 certainly appear to be two forms. In cleaning some of these shells 

 taken on November 8, 1891, a few of the finest living specimens 

 contained the peculiar parasite, reference to which is made by Dr. 

 Dall, in his useful pamphlet, " Instructions for Collecting Mollusks, 

 etc." (Leucochloridium). 



Caryckium exiguum Say. Very common in decaying vegetation 

 in woods and all damp places. 



NEW LOWER CALIFORNIAN BULIMULI. 



BY H. A. PILSBRY. 



Bulimulus hypodon n. sp. 



With the general form of B. spirifer Gabb, this smaller species 

 differs in the more convex lateral outlines of the spire and the much 

 shorter body-whorl, which in a dorsal view is not produced and ob- 

 long, but short and transverse, and with the suture ascending some- 

 what toward its termination. Whorls 7^, surface with an oily 

 polish, only slight growth-lines, but under the lens showing close, 

 fine incised spiral stri(e, without trace of granulation. Aperture 

 slightly over half the total alt. ; p?ri.<l<u>i? rrry broad/t/ mid flatly re- 

 flexed, recurved at the edge, the margins joined by a rather heavy 

 callus, but without defined edge. Columella distinctly truncate at 

 base ; internal lamina well-developed, thin, triangular. Color almost 

 white, the cuticle with an extremely faint buff tint. Alt. 25, diam. 

 12'5 mm.; alt. of aperture (including peristome) 13, width 10'2 mm.; 

 width of reflexed outer lip 2'3 mm. 



Lower California, exact locality unknown. 



