1869.] WHITEAVES — CANADIAN MARINE MOLLUSCA. 51 



Saxicava (^Panopaa') Norvegica Spengier : — Six dead but fresli 

 specimens, in 50 fathoms mud. 



Saxicava nigosa Linn, and var. arctica: — Common, burrow- 

 ing into stones in from 10 to 20 fathoms. 



Anatlna papyracea Say : — One alive, in 50 fathoms mud. 



Tliracia inyopsis Moller : — A few taken with the above. 



Lyonsia (^Pundorina) arenosa Moll. — Living in sandy mud, 

 in 30 to 50 fathoms. The shell is covered with particles of sand, 

 as the specific name implies. 



Pandora (Kennerlya) glacialis heaoh. : — Living with the above. 

 Externally it closely resembles the Pandora ohtusa of Forbes and 

 Hanley, which is the Solen pinna of Montague. According to 

 Dr. P. P. Carpenter, P. glacialis has an internal ossicle, which 

 is wanting in the British shell. 



GASTEROPODA. 



Cyllclma alba Brown : — Living in 40 to 60 fathoms. 



Tonicia marmorea 0. Fabr. — Common on stones, in 10 to 20 

 fathoms. 



Leptocliiton alius Linn. — With the above ; frequent. 



Tectura testudinalis Miill. — In very shallow water. 



Lcpeta coeca Miill. — On stones, in 20 to 50 fathoms, living. 



Cemoria Noachina Linn. — Living with the above. 



Margarita striata Brod. et Sow. (=31. cinerea Gould). 



Margarita Groenlandica Chemn. and var. undulata 



Margarita ohscura Couth. 



Margarita varicosa Migh. : — These four species were taken 

 living, in from 30 to 50 fathoms mud, the last being by ftir the 

 most abundant,' The M. varicosa is the same as the M. 

 elegant issima of Searles' Wood's Crag Mollusca. 



Lacuna vincta Fabr. — On sea-weeds in shallow water. 



Littorina littoralis Linn, fide Jeffreys (= L. jx^dliata Say) : 

 — Common on rocks on the shore. 



Littorina rudis Mont. — With the above. The varieties patula 

 and tenehrosa were common, but I did not meet with the ty} e. 

 L. Groenlandica Chemn. appears to be a variety of this species. 



Scalaria Groenlandica Perry : — One living specimen on a 

 stone, in 20 fathoms water. 



Mesalia (?) erosa Couth. — Abundant, Uving in 20 to 50 

 fathoms mud. 



Mesalia (?) retictdata Migh. — With the above, but less frequent. 



