﻿CONCLUDING REMARKS. 



197 



have already been clearly identified, on the West 1 Pacific coast ; several of these can 

 scarcely have travelled through Behring Straits, not being Boreal forms." The 

 following species, now living on the north-west coast of America, are given by 

 him ('Brit. Assoc. Rep.,' Newcastle, 1863) as identical with Crag forms. Those with 

 an asterisk are also given as Tertiary fossils of Maryland and Virginia by Sir C. Lyell 

 ('Proc. Geol. Soc.,' 1845, p. 555). 



Coralline Crag Species. 



Mya trimcata, Linn. 

 Sphenia ovoidea (?), Carpenter. 

 *Glycimeris generosa (?), Gould (Panopea Fau- 

 jasii). 



Saxicava Arctica, Linn. 

 *Tellina donacina, Linn. 



Astarte triangularis, Mont. 

 * — fluctuatus, Carpenter. 



Miodon prolongatus (Cardita corbis). 

 *Lucina borealis, Linn. 



Cryptodon flexuosus, Don. 



Verticordia novem-costata (?). 



Kellia suborbicularis, Mont. 



Lasoea rubra (?), Mont. 



Area tetragona, Poli. 



*Arca lactea, Linn. 



Mytilus edulis, Linn. 



Modiola modiolus, Linn. 



Modiolaria marmorata, Forb. 



Lima subauriculata, Mont. 



Hinnites giganteus (?), Gray. 

 *Erato columbella, Carpenter. 



Cerithiopsis tubercularis, Mont. 



Cerithium adversum, Mont. 

 *Eulima micans, Carpenter. 

 *Solariella peramabilis (J), Carpenter. 



Margarita Vahlii (?), Moll. 

 *Galerus sinensis, Linn. 



Cylichna cylindracea, Pennen. 

 — mammillata, Phil. 



Rhychonella psittacea. 

 Macoma inquinata. 

 Astarte coropressa. 

 Cardium Groenlandicum. 

 Nucula tenuis. 

 Acila castrensis (?). 

 Leda minuta. 

 Yoldia lanceolata. 



Red Crag Species. 



Bela fidicula. 



— excurvata. 

 Purpura saxicola (?). 

 Lacuna vincta. 

 Natica clausa. 

 Velutina laevigata. 

 Dentalium Indianorum. 



Any inferences which might be drawn from the identifications of Dr. P. Carpenter in 

 the case of the Pacific shells, and of Sir Chas. Lyell in the case of the United States 



1 East Pacific coast {i.e. west coast of America) is probably intended. 



