28 THE NAUTILUS. 



Criticism of meanings in zoological nomenclature has long 

 been given up as hopeless, since zoological Latin is not classical 

 but the colloquial patois of the 18th century. 



The form Turritidae was the first used and therefore, other 

 things being equal, is entitled to the preference. In the whole 

 of zoological literature, except Adams' Appendix, until lately 

 the Turrii combination does not occur in a single instance, 

 while Scudder gives ten instances of the Turriti form. Even in 

 English we say a castle is turrited and not Turried. Turritus 

 means high, lofty or turrited. Turritidae is the family of the 

 same. Finis ! 



LAND SHELLS FROM BEAVER COUNTY, PENNSYLVANIA. 



BY E. G. VANATTA. 



Mr. James B. Clark collected several packages of leaf mould 

 on the Clydesdale Brick and Stone Company's farm in Beaver 

 County near Ellwood City, about 39 miles north of Pittsburgh, 

 Pa., from which I picked specimens of the species listed below. 



The examination of the animal of Euconulus sterkii Dall, which 

 is very abundant at this place, revealed a horn upon the tail 

 and tricuspid lateral teeth, proving that this species is a Guppya. 

 The microscopic sculpture of the shell is also like that genus. 

 Polygyra tridentatajuxtidens Pils. Polita hammonis (Strom.). 

 Polygyra prqfunda (Say). Polita indentata (Say). 



Polygyra denotata (Fer. ). Paravitreamultidentata(~Bmn.'). 



Polygyra pennsylvanica (Gr. ). Euconulus chersinus (Say). 

 Polygyra thyroidus (Say). Guppya sterkii (Dall). 



Polygyra albolabris (Say). Zonitoides arbor ea (Say). 



Polygyra zaleta (Binn.). Zonitoides minuscida (Binn. ). 



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



Gastrocopta contracta (Say). Pyramidida alternata (Say). 



Columella edentula (Drap. ). Gonyodiscus perspective, (Say). 



Cochlicopa lubrica (Mull). Panctum pygmasum (Drap.). 



Haplotrema concava (Say). Succinea retusa Lea. 



Omphalina cuprea Raf. Carychium exile Lea. 



Mesomphix inornata (Say). 



