10 THE NAUTILUS. 



Collectors who have readily detected a varietal difference in the 

 lighter weight of shells sent out as Cardium nuttallii Conrad, may 

 regret that these shells are not recognized even as a variety, but are 

 included in I lie synonym of Cardium (Cerastoderma) corbis Martyn. 

 Card him b/andum Gould is a synonym of C. (Cerastodcrma) caJifor- 

 niensis Deshayes. Cardium (Cerastodermv} ciliatum O. Fabricius ( C. 

 islandicum Chemnitz (a synonym) and Serripes gronlandicus Gmelin 

 are Arctic sea species that are tound on the Atlantic and Pacific 

 shores. Cardium asperxum Sowerby is listed as a variety of the 

 eastern coast Cardium (Pupyridea) spinosum. 



Dr. Dall says Carditnn (Lcevicardium) elalum Sowerby " is the 

 largest species of the genus." We have often noted the variation in 

 shape of some uf the large cardiums of the West Coast; he says of 

 these oval and rotund forms that they may possibly be correlated 

 with sex M. B. W. 



DESCRIPTION OK A NEW STECIKS OF UNIO FROM THE CRETA- 

 CEOUS ROCKS OF TIIF, NANAIMO COAL FIELD. By J. F. Whiteaves 

 (Ottawa Naturalist, XIV., Jan., 1901). Unio nanaimoensis n. sp. 

 Unin hnbbardi Gabb is stated to be from the Cowgitz coal mine, on 

 Graham Island, one of the Queen Charlotte Is., and probably did 

 not come from Vancouver Island, as originally reported. 



NOTES ON SOME LAND AND FRESHWATER. MOLLUSCA FROM 

 FORT CHIMO, UNC.AVA BAY. By J. F. AVhiteaves (Ottawa Nat., 

 X I V., March, 1901). The specimens were collected by Mr. W. 

 Spreadborough in 1896, and comprise Litimata palustrus var. valilii 

 Planorbis arcticns ('* which may be only a synonym of P. parrus,") 

 I'n/rnfa sine era and Pisidium steenbnc.kii. Notices of previous rec- 

 ords of non-marine mollusks of Labrador are given. 



ADDITIONS TO THE MARINE MOLLUSCA OF THE BERMUDAS. 

 By A. E. Verrill and Katherine J. Bush. THE Ni DIBRANCHS 

 AND NAKED TECTIIJRANCHS OF THE BERMUDAS. By A. F. 

 Verrill. (Trans. Conn. Acad. of Sci., X., 1900). The additions to 

 the fauna recorded in these articles are mostly from the collection 

 made at the Bermudas in April and May, 1898, by the Yale scien- 

 tific party under Professor Verrill. In the first paper about 80 

 species are recorded for the first time from the Bermudas, 25 of 



