68 THE NAUTILUS. 
Polygyra fallax (Say). Striatura milium (Morse). 
Polygyra albolabris (Say). Euconulus fulvus (Mill. ). 
Polygyra thyroidus (Say). Zonitoides arborea (Say). 
Strobilops floridana Pils, Zonitoides minuscula (Binn.). 
Pupoides marginatus (Say). Zonitoides minuscula alachuana 
Gastrocopta corticaria (Say). Dall. 
Gastrocopta contracta (Say). Agriolimax campestris (Binn. ). 
Gastrocopta armifera (Say). Pyramidula alternata fergusont 
Gastrocopta pentodon Say. (Bld.). 
Vertigo tridentata Wolf. Pyramidula cronkhitei anthonyi 
Vertigo milium Gld. Pils. 
Vallonia pulchella (Mill. ). Helicodiscus parallelus (Say). 
Columella edentula (Drap. ). Punctum pygmeum (Drap. ). 
Polita hammonis (Strém. ). Succinea ovalis Say. 
Polita indentata (Say). Carychium exiguum Say. 
PUBLICATIONS RECEIVED. 
OBSERVATIONS ON Living LAMELLIBRANCHS OF NEw ENGLAND. 
By Edward S. Morse (Proc. Boston Soc. Nat. Hist., Vol. 35, 
no. 5, July, 1919). In this valuable memoir Professor Morse 
describes and figures the expanded animals of 48 species of New 
England lamellibranchs. Hitherto most of the work on these 
mollusks has been done with alcoholic examples, which in their 
contracted condition give little idea of the beautiful and elab- 
orate structures guarding the siphon openings and mantle edges 
of the living animal. Only those who have attempted to draw 
living mollusks can appreciate the application and patience re- 
quired,—they are often stubborn, and refuse to show off; but 
all will admire the beautiful line drawings of these graceful 
structures. The figures of Solemya, Nucula and Yoldia are 
especially interesting. Some of the genera have the foot re- 
markably specialized. 
Professor Morse takes the occasion to land a few resounding 
whacks on the nomenclature shifters. It is obvious that many 
of the changes (such as the adoption of Bolten’s very German 
catalogue) were unnecessary and detrimental to science; yet 
