PLEISTOCENE FOSSILS. 251 



Natica dama. Brod. and Sowerby. 



Fossil Montreal; Quebec; Riviere-du-Loup ; St. John, &c., N.B. 

 (Matthew) ; Labrador ; Anticosti ; Chaudiere Station ; Portland, 

 Mcaine ; Vancouver Island. (G. M. D.) (Plate VI., Fig. 4.) 



Recent Greenland to Cape Cod ; Little Metis ; Gaspe ; Tadousac ; 

 Kamouraska ; also British Columbia. 



Common and extensively distributed in the Post-pliocene of Europe, 

 from Norway to Sicily, and found at an elevation of 1330 to 1360 feet 

 in Moel Tryfaen, Wales. (Darby shire). It has been identified with 

 N. ajfinis, Sm., but Sars and Verrell consider this quite different. 



Lunatia heros. Say. 



Fossil Beauport, a single specimen only, and this of small size ; 

 River Charles, N.B. (Matthew); New Richmond; also a depauperated 

 variety ; Benjamin River, supposed by Matthew to be possibly a 

 distinct species or variety. Var. Chalmersi (Matthew). 



Recent Labrador and southward. 



This species is as old as the Miocene Tertiary ; and in the Pleisto- 

 cene, Canada was probably its extreme_ northern limit. 



Lunatia Grcenlandica. Beck. 



Fossil Montreal ; Quebec ; Riviere-du^Loup ; Anticosti ; Maine ; 

 also Pleistocene of England, Scotland, and Norway. 



Recent Little Metis ; Gasp4 ; Riviere-du-Loup ; Arctic seas 

 generally ; and extending to Britain and New England. 



L. pallida is the representative of this species on the west coast of 

 America. 



Choristes elegans. Cpr. 



Fossil Saxicava sand, Montreal. Rare. (Plate L, Fig. 13.) 

 This shell was identified in my former papers with Natica helicoides; 



but it is now found to be quite distinct, and Dr. P. P. Carpenter 



d ascribes it as a new species and genus as follows : 



Genus CHORISTES. 



Testa helicoidea, tenuis ; epidermide induta ; anfractus disjuncti ; 

 labrum postice angulatum, antice haud emarginatum ; labium plana- 

 tum ; columella simplex. Animal ignotum. 



Choristes elegans, n. s. 



Ch. t. satis elevata, tenui, nitente ; epidermide fulva, tenui, laevi, 

 extus et intus omnino appressa ; anfr. iii. + ....?, vertice nucleoso 

 decollate, spiraliter obsoletius striatis ; lineis increment! tenuissimis ; 



