MOLLUSKS. 

 Analyses of pelecypod shells. 



39 



Reduced analyses of pelecypod shells. 



2. SCAPHOPODS AND AMPHINEUBANS. 

 Under tliis heading we have only two analyses to offer, as follows: 



12. Dentalium solidum Verrill. Off Georges Bank, east of Cape Cod, Mass.; depth of water, 2,361 meters; bottom 

 temperature, 4.5° G. 



13. Mopalia miMcosa Gould. Santa Barbara, Calif. A chiton. 



Analyses of scaphopods and amphineurans. 



Analyses. 



SiOj 



(Al,Fe)A 



MgO 



CaO 



SO3 



P2O5 



Ignition 



CO, needed 



Organic matter, etc 



12 



0.39 



.26 



.09 



53. 89 



(?) 



Trace. 

 44.48 



99.11 



42.44 



2.04 



13 



0.59 



.21 



.25 



53.42 



.20 



Trace. 



44.74 



99.41 



42.13 



2.61 



Reduced analyses. 



SiO, 



(Al,Fe)o03 



Mg(K)3.... 



CaCOs 



(^aSO, . . . . 



12 



0.40 



.27 



.20 



99.13 



(?) 

 Trace. 



100. 00 



13 



0.61 



.22 



.45 



98.37 



.35 



Trace. 



100. 00 



3. GASTROPODS. 



14. Purpura lapilhis I^inn^. Eastport, Maine. 



15. Aporrhais occidentalis Beck. Off Marthas Vineyard, Mass.; depth of water, 435.5 meters; bottom tempera- 

 ture, 5.5° C. 



16. Buccinuni undatum Linn6. Narragansett Bay, R. I.; depth, 53.3 meters; bottom temperature, 9° C. 



17. Naiica duplicata Say. Cape Lookout, N. C. 



18. Olivia literata T-amarck. Sarasota, Fla. 



19. Fasciolaria dittan.-i Lamarck. Sarasota, Fla. 



20. Crepidula onyx Sowerby. San Pedro, Calif. 



21. Antiplan^ss perversa Gabb. Off Bodega Head, Calif.; latitude, 38° 23' 35" N.; depth, 112.5 meters; bottom 

 temperature, 9° C. 



22. Nassa californiana Conrad. .Monterey Bay, Calif,; latitude, 36° 47' 50" N.; depth, 67.7 meters; bottom tem- 

 perature, 11.3° C. 



