146 NATURAL HISTORY OF ARCTIC AMERICA. 



Buccinum tenebrosum, Hancock, (typical). 

 Buccinum gronlandicunij Cheinn. 



* Trophou truncatus, Strom. 

 Margarita uinhilicalis, Brod. & Sby. 

 Margarita helicina, Fabr., vars- 

 Litorina gronlandica, Morch. 

 Acmwa tcstudinalin, Linu^. 

 Aeolidia papillosa,, Linne. 



* Bendronotus reynoldsii, Coutliouy. 

 Mya truncata, Linn4. 



* Glycimeris Kurriana, Bkr. On mud Sats. 

 Saxicava arctica, Linne. 



*Astarte horealis, Gray ; attached to kelp. 



* Turtonia minuta, Fabr. ; in nest of Modiolaria. 

 Modiolaria laevigata, Gray. 



Modiolaria discors, Linn^. 



Modiolaria {Crenella) faha, Fabr. 



Chiton {Tonicella) marmorea, Fabr. 



HhynclioneUa imttacea, Fiscber; dead broken valves, apparently dis- 

 gorged by some bird, were found on tlie bills at a considerable distance 

 from tlie sea. They are evidently not fossil, and are probably to be 

 found living in suitable places at low-water mark. 

 November "Jtt, 1378. 



