68 THE NAUTILUS. 



Polygyra fallax (Say). Striatura milium (Morse). 



Polygyra albolabris (Say). Euconulus fulvus (Miill. ). 



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 fergusoni 



Gastrocopta pentodon Say. ( Bid. ) . 



Vertigo tridentata Wolf. Pyramidula cronkhitei anthonyi 



Vertigo milium Gld. Pils. 



Vallonia pulchella (Miill.). Helicodiscus parallelus (Say). 



Columella edentula (Drap. ). Punctum pygmceum (Drap.). 



Polita hammonis (Strom.). 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 



