NORTH AMERICAN CONCnOLOGY. 



235 



Middendorfil — Beitriige zu Einer Malacozoologia Rossica : 

 von Dr. A. Th. von Middendorfp. St. Petersburg, 1847-9. 

 (From Memoires des Sciences Naturelles de I'Academie Impe- 

 riale des Sciences. Tome VI.) 



[Very many New England and Arctic Mollusks are described in this 

 work ; I give only those referred to N. W. America. I quote from the 

 separate work. — W. G. B.] 



Vol 



. i. 1847. 









Pa. 



PI. 



V\g. 



Name. 



Locality. 



98 



X 



1. 



2 



Chiton (Platysemus) tunicatus Wood. Sitka, &c. 



101 



«xi 



1, 



2 



(Platysemus) -wosnessenskii Midd. N. Cal,, &c. 



109 



xii 



8, 



9 



(Stenosemus) lineatus Wood. 

 C. insignis Rve. ? 



. Sitka, &c. 



112 



xiii 



1, 



2 



Sitchensis ilidd. 



Sitka. 



114 



ix 





4 



Eschscholtzii xUidd. 



Sitka. 



115 



xi 



5, 



,6 



Merckii Midd. 



Sitka. 



117 









ruber Lowe. 



C. cinereus Fabr. 

 Icsvis Pann. 



Greenland, &c. 



120 









albus Linn. 



C. aselloides Lowe. 

 sagrinatus Couch. 



Greenland, &c. 



122 









cinereus Linn. 

 C. asellus Lowe 

 apiculatus Say. 

 minimus Linn. 





124 









lividus Midd. 



Sitka. 



125 









Martensii Midd. 



California. 



127 









scrobiculatus, Midd. 



California. 



Part ii. iii. 1849. 



32 



34 i 6 



35 



36 



Patella (Acmaea) cassis Each. 

 scurra Lvss. 



Acmaea mitra Esch. 



mammillata Esch. 

 marmorea Esch. 

 Lottia ? pallida Gr. 

 digitalis Esch. 

 persona Ench. 



Acmxa radio la Esch. 

 ancyliis Esch. 

 scutum Esch. 

 ? Lottia punctata Gray. 



16 



Sitka. 

 Sitka. 



Sitka. 

 Sitka. 



