.MARINE INVERTEBRA TES 



243 



SESSIONAL PAPER No. 38a 



Bathymetric Tables — Continued. 



Bathymetric Range. 



Min. 



and 



Max. 



Depth. 



Inter- 

 tidal. 

 Zone. 



Fathoms. 



1-15 



15-50 50-100 100 X 



Ctenosomata. 



Alcyonidium gelatinosum (L) 



Alcyonidium mytili Dalyell 35, 47 



Barentsia graciUs M. Sar.s 



Barentsia major Hincks 35 



Flustrella hispida (Fabricius) 



Pedicellina nutan.s Dalyell 9 



MOLLUSCA. o 



Pclecypoda. 



Anomia aculeata Muller 42 



Anomia simplex d'Orbigny 35, 46 



Area (Bathyarca) glaeialis Gray 



Area (Bathyarca) pcctunculoides Scacchi 



Astarte banksii (Leach) 



Astarte banksii var. globosa Moller 



Astarte banksii var. striata Leach 



Astarte eastanea Say 35, 42 



Astarte compre.ssa (L) 



Astarte crebricostata Forbes 



Astarte crenata Gray 46 



Astarte lactea Broderip & Sowerby 



Astarte quadrans Gould 5 



Astarte subaequilatera Sowerby 42 



Astarte undata Gould 35, 42, 46 



Astarte undata var lutea Perkins 



Axinopsis orbiculata var. inaequalis Verrill & Bush. 

 Cardium (Cerastoderma) ciliatum Fabricius 19, 



35,42 



Cardium (Laevicardium) mortoni Conrad 35 



Cardium (Cerastoderma) pinnulatum Conrad 35 



42,46 



Clidiophora gouldiana Dall 46 = Pandora goul- 



diana 35, 42 



Cochlodesma leanum (Conrad) 35 



Crenella decussata (Montagu) 



Crenella faba (Moller) 



Crenella glandula (Totten) 35, 42 



Crenella pectinula (Gould) 



Cryptodon (Axinulus) ferruginosus (Forbes) 



Cryptodon gouldii Phillipi 



Cryptodon (Axinulus) inaequalis Verrill & Bush. . . 

 Cryptodon obesus Verrill = Thyasira obesa 46. . . 



Cryptodon planus Verrill & Bush 



Cumingia tellinoides (Conrad) 



Cuspidaria arctica (M. Sars) 



Cuspidaria glaeialis G. O. Sars 



Cuspidaria pellucida (Stimpson) 



Cyprina islandica (L) 42 



Cyrtodaria siliqua (Daudin) 



Cytherea convexa Say 42, 46 = Callocardia morr- 



huana 35 



Dacrydium vitreum (Moller) 



Ensis directus (Conrad) = E. americanum Gould 



35,46 



1-16. 

 3-13. 



3-100. 

 2-8... 



70-430. 

 10-60.. 

 70-80.. 



5-20 ... 

 10-.50... 

 112-313. 

 15-120.. 



6-40.. 

 50. . . . 

 5-100. 

 5-100. 



10-60 . 

 2-5... 



2-80. 



0-30. . 

 2-19.. 

 20-60. 

 1-15.. 

 0-60.. 



200-313. 

 10-313. . 



14r49... 



-100. 



190 ? . 

 .50-313. 



40 



6-90. . . 

 15-50.. 



I.T.-15.. 

 100-313.. 



0-40. 



a. Note. — Students of the geographic distribution of the Mollusca will find it instructive to 

 compare with this list the following two papers by Dr. Wm. H. Dall : 



" Checklist of the Recent Mollusks of the Northwest coast of America from the Polar sea 

 to San Diego, California," pp. 1-44, 1916. S. West Museum, Los Angeles, Calif. 



" Report on the Mollusca of the Arctic coast of America collected by the Canadian Arctic 

 Expedition west from Bathurst Inlet." Scientific Results of the Expedition, — in the press. 



