PLKIS'IOCKXK roSSlLS, 25.^ 



Tlio sliell ill (|Hcsti<m piescnts tlic very umisual charactor of having 

 tiie wiiiils iipprt'ssoil, yot ([iiito diMcomn'cteil ; tiio smooth opidermis 

 lining tho unihilical (;liani))urs, and conspicuously prcHorvcd, even in 

 tiicsc fossil specimens, l)ctwccn the closest parts of tiic parietal region. 

 In this respect it l)ears the same relation to Torellia as (h)eH Latiaxia 

 to Rapana, Sei)aratista to Khi/.ocliilus, or Zanclea to 'I'orinia. It 

 presents a rude rescmldanco to Si'panttintd VhiiiiiiilAl (Add. (ien. 

 pi. xiv. f. (J), or still more to .S'. HlninrilleiDin (('licnu Man. p. 17'2, 

 § S.").'{), hut without the grooved i)illar, or the keels of the latter species. 



As to the " hlunt tuhercle " or " callous protulieraiico " of Torellia, 

 descrilied hy Mr. iJellVeys, l)ut scarcely to 1)0 traced in Mr. Soworhy'a 

 figure, it certainly does not exist in our fossils. It is not always a 

 character of importance, as may ho soon hy comparing Piirpuni 

 columelbtvia with P. patula, Cuma tectum with the remaining species 

 of the genus, or the gradual transition from Isapis to Kossarus. The 

 Naticidic are often very irregular in the callous region of the pillar, 

 even in tho same species, 



[The late J. (iwyn JetFreys regarded it as congeneric with his 

 Tori //id resfitn from the .N'orth Atlantic, hut specitically distinct. 

 \'urrill has, since the discoveiy of tho species in the I'leistocene, 

 dredged specimens in deep water off tho Now England coast.] 



Vt/iilinii -(inula. (4ou!d. (Plate VI., Fig. (i. ) 



Fossil — Montreal ; Heauport. 



Recent —Arctic seas to Massachusetts; Little Metis: Kamouraska ; 

 Xova .Scotia. 



According to .Jeffreys, tiiis shell is the same with V. inii/tifn, Smith, 

 from the Clyde l)eds, and is found in the Crag and in the I'ost-pliocene 

 of Uddevalla. 



Sat/(iri(i Gni n/iini/'iai. Perry. 



Fossil — Riviere-<lu-Loup ; Quehee ; .Saco ; also .Scottish Post- 

 pliocene and English Red Crag, under same varietal forms as in 

 Canada. (Plato VI., Fig. ."), ) 



Recent— Rivicre-du-L(}up; Nova Scotia ; Kamouraska; Arctic seas, 

 and American coast, as far south as Massauliusetts. 



The specimens from Rivicre-du-Loup are very large, one heing 

 nearly two inches long ; and, as Dr. Reck has remarked, the varices of 

 some of the specimens are more ilenJir and lamellar than in recent 

 specimens, others, however, are similar co the more conunon recent 

 variety. 



