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SHarp, B.—Variations in Bullimus exilis. Proc. A. N. S. Phila., 
1890, p. 148, 
Pirssry, H. A—On Helix albolabris, var. maritima. Proc. 
A. N.S. Phila., 1890, p: 282. 
Jackson, R. T.—Studies of Pelecypoda. Am. Nart., XXIV., 
p. 1132, 1890 [1891]. 
The mechanical origin of structure in Pelecypods. Am. 
NatT., XXV., p. 11, 1891. 
Van IncEN, G.—Preliminary list of the land snails of Pough- 
keepsie, N. Y. Trans. Vassar Bros.’ Inst., V., p. 161, 1890. 
Baker, F. C.—Remarks on the Muricidæ, with descriptions of 
new species of shells. Proc. A. N. S. Phila., 1891, p. 56.— 
Ricinula (Sistrum) rugosoplicata (lower Cal.) is the only new 
American species. 
—Notes on a collection of shells from Southern Mexico; /.c., 


p. 45.—Nominal list. 
Yates, L. G.—A new locality for Helix ayresiana. West Am. 
Scientist, VII., p. 8, 1890.—Islands off California coast. 
* Darl, W. H.— Results of dredging in the Gulf of Mexico 
and the Caribbean Sea, [etc.].—Report on the Mollusca. Pt. II. 
a and Scaphopoda. Bull M. C. Z., XVIII re escribes 
385 n. 
eaae sans branchies. Bull. Soc. Zool. Fr., 
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* Bryney, W. G.—Third PERE TE to the fifth volume of the 
terrestrial air-breathing molluscs of the United States. Bull. 
MC Z ALA. p 183. 
SHIMEK, B.—A new species of fresh-water mollusc. Bull. 
Lab. Nat. Hist., Univ. Iowa, Lop 24 oe E obliquus 
(Nebraska). 
Hempuitt, H.—A collector's notes on variation in hells with — 
some new varieties. Zoe, I., p. 321, 1891—New forms are 
= varieties of Anodonta , 
ee STERKI, V.—On new forms of Vertigo. Proc, A-N. S.:Phila., 
fs sto p aer callosa (Mass., Ohio), V. dinneyana N 
V. oscariana a K er m — ! 


