THE NAUTILUS. 143 
MoRPHOLOGICAL FEATURES OF CERTAIN MUSSEL SHELLS FOUND 
IN Lake ERIE COMPARED WITH THOSE OF THE CORRESPONDING 
SPECIES FOUND IN THE DRAINAGE OF THE UPPER Ouro. By 
Norman McDowell Grier. (Ann. Carnegie Museum, Vol. 13, 
pp. 145-182, 1920.) 
MarinE Mo.iusks or Hawa. By Henry A. Pilsbry. 
(Proc. Acad. Nat. Sci., Phila., 1920, pp. 296-328, pl. 12, with 
11 figs. in text.) Forty-five new species and subspecies are 
described, with keys to the described species of Hawaiian 
Terebra and Mitra.—C. W. J. 
THe West AMERICAN MOLLUSKs OF THE FAMILIES RISSOEL- 
LIDAE AND SYNCERATIDAE AND THE RissorID GENUS BARLEEIA. 
By Paul Bartsch. (Proc. U. S. Nat. Mus., 1920, Vol. 38, pp. 
159-176, pls. 12, 13.) 
New FRESH-WATER SHELLS FROM GUATEMALA. By William 
B. Marshall. (Proc. U. S. Nat. Mus., 1920, Vol. 58, pp. 301- 
302, pl. 17.) 
THREE NEW SPECIES OF PLEUROCERIDAE. By Calvin Good- 
rich. (Occas. papers Mus. Zool., Univ. Mich., No. 91, pp. 
1-5, pl. 1, 1921.) 
NEw FLORIDIAN SUBSPECIES OF THE GENUs Licuus. By 
Charles T. Simpson. (Proc. Biol. Soc., Washington, 1920, 
Vol. 33, pp. 121-126.) Eighteen new subspecies are described. 
SUMMARY OF THE MARINE, SHELL-BEARING MOLLUSKS OF THE 
NORTHWEST COAST OF AMERICA, from San Diego, California, to 
the Polar Sea, mostly contained in the collection of the United 
States National Museum, with illustrations of hitherto unfigured 
species. By William Healey Dall, U. S. Nat. Mus. Bull. 112, 
1921, 217 pages, 22 plates. ‘‘To the preparation of this sum- 
mary the author has brought the results of more than 50 years’ 
study of the molluscan fauna of the northwest coast.’’? Its ap- 
pearance has long been looked forward to by West Coast con- 
