I'LKISTOC'KNK FOSSILS. 251 



Xdlica rhiHHd, }Jro(l. and Sowerby. 



Fossil —Montreal ; (Quebec; KiviiTe-du-Loup ; St. John, &c., N.lt. 

 (Matthew); Labrador; Antioosti ; C'haudii're Station; Portland, 

 Maine ; Vancouver Island, (d. M. D.) (Plate VI., Kig. 4.) 



Recent — (Jrcenhind to Cape Cod ; Little Metis ; (Jaspe ; Tadousac ; 

 Kaniouraska ; also liritisli Columbia. 



Common and extensi\ ely distiiliuted in the Post-pliocene of Kurope, 

 from Norway to Sicily, ami found at an elevation of I.S.SO to VMVi feet 

 in Mocil Tryfaen, Wales. (I)arbysiiire). It has been identiKed with 

 N. affinix, Sni., but Sars and Verrell consider this quite different. 



Lnnatiu he rot. Say. 



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

 River C'liarles, N.IJ. i.Mattiiew) ; New Richmond; also a depauperated 

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

 distinct species or variety. Var. ('htihtierni (Matthew). 



Recent — Labrador ami southward. 



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

 cene, Canada was probably its extreme northern limit. 



Lunatia Orfeiilnndiai. Beck. 



Fossil — Montreal ; Quebec ; Riviere-du-Lonp ; Anticosti ; Maine ; 

 also Pleistocene of England, .Scotland, and Norw ay. 



Recent — Little Metis ; (Jaspe ; Riviere-du-Loup ; Arctic seas 

 generally ; and extending to Britain and New England. 



L. jmU'ula is the representative of this species on the west coast of 

 America. 



Choride:* ele(j(i)iii. Cpr. 



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

 This shell was identified in my former papers with Xatiai helkoiden; 



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



d'jscribes it as a new species and genus as follows : 



Genus Ciioklstes. 



Testa helicoidea, tenuis ; epidermide induta ; anfractus disjunct! ; 

 labrum postice angulatum, anlice baud emarginatum ; labium plana- 

 tum ; columella simplex. Animal ignotum. 



ChorisltH eleijans, n. s. 



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

 extua et intus omnino appre'ssa ; anfr. iii. + ....?, vertice nucleoso 

 decollato, spiraliter obsoletius striatis ; lineis incrementi tenuissimis ; 



