ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 5S5 



1733. Yoldia limatida, Say. Awatska Bay and Arctic Oc. Mud, common, 5-20 fm. 



1734. Natica clausa, Brod. Awatska Bay. Mud, 5-15 fm. 



1735. Yoldia mi/alis (or hyperborea). Awatska Bay. Mud, 10 fm. 



1736. Leda minuta. Seniavine Str. ; Arctic Oc, near Behr. Str. Mud and pebbly 



sand, 15-30 fm., coarse striae. 



1737. Zeda mimda, var. Ditto. Mud and pebbly sand, 5-20 fm., fine strise. 

 174:0. 3Iodiolariacorri((/ata. Ditto. Mud, m nests, 30 fm. 



1741. Mhynchonella psittacea. Ditto. Gravel and sponges, 20-30 fm. 



1742. Margarita striata, Leach. Ditto. Shelly gravel, common, 15-30 fm, 



1744. Adfiiete ardica, Midd. Ditto. Mud, 30 fm. 



1745. Adtnete viridula, Couth. Ditto. Gravel, 4 fm. ; mud, 10-30 fm. 



1747. Vehitina haliotoidca. Ditto. Gravel, 10-25 fm. 



1748. Margarita argentata [Gld. Inv. Mass.]. Ditto. Mud, 30 fm. ; shelly, 15- 



25 fm. 



1749. Turritella (sp.), Migh. Ditto. Mud, 30 fm. ; clean gravel, 4-20 fm. 



1750. Trichotropis bicarinata. Ditto. Pebbly mud, 5-6 fm. 



1751. Lunatia pallida, Brod. Ditto. Mud, 10-30 fm. 



1752. Cylichna triticea, Couth. Ditto. Mud, 15-30 fm. 



1753. Vehdina [^Morvilia'] zonata [Gld. Inv. Mass.]. Ditto. On stones, 5 fm. 



1754. Niccula tenuis, Mont. Ditto. Mud, common, 20-30 fm. ; pebbly mud, 5-20 



fm. Al*o Hakodadi ; sandy mud, 10 fm. ; no. 1687. 



1756. Trophm clathratus, Linn. Ditto. Mud, 20-30 fm. ; gravel, 4 fm. 



1757. Lunatia septentrionulis, Beck. Ditto. Gravelly mud, common, 20 fm. j 



gravel, 4 fm. 



1758. Amicida vestita, Sby. Ditto. Gravel, common, 10-40 fm. 



1759. Scalaria Gra-nlandica, Chenm. Ditto. Mud, 30 fm. 



1760. Lunatia pallid aid cs. Ditto. Mud, 30 fm. 



1761. Chrysodomus Islandicm, Chemn. Ditto. Mud, 30 fm. 



1762. Patella [Lepeta'^ Candida, Couth. Ditto. Mud, 30 fm. 



1763. Chiton albus, Lmn. Ditto. On shells in mud, 30 fm. 

 1765. Chrysodomus Schanfaricus, Midd. Ditto. Mud, 20-30 fm. 



1770. Astarte lactea, Br. and Sby. Arctic Oc. Mud, 30 fm. 



1771. Pecten Islandicus, Chemn., var. Arctic Oc. Mud, 30 fm. 



1773. Buccinum fundatum (probably bicarinate var. oi glaciale). Arctic Ocean- 



1774. Buccinum 'hmdatum, var. pelagica. Arctic Ocean. 



1775. Buccinmn ?Ochotense, Midd. Arctic Ocean. 



1776. Buccinian aiigulosum, Gray ( = glacial€, var.). Arctic Ocean. 



1777. Buccinvm ? tenue, Gray. Arctic Ocean. 



1778. Mangelia, like mnplex, Midd. Arctic Ocean. 



1781. Bela rufa, Mont. Seniavine Str. Pebbly mud, common, 5 fm. 



1783. Turritella erosa. Seniavine Str. Mud, iO-20 fm. 



1784. Lyonsia Norvegica, (Jhem. Senia\4ne Str. Pebbly mud, 5 fm. 



1785. Trichotropis insignis, Midd. Seniavine Str. Gravel, 10 fm. 



YiOQ. Bela decussata. Couth. Seniavine Str. Sandy mud, 10-20 fm. Also Awatska 

 Bay ; no. 1730. 



1790. Yoldia myalis, Couth. Seniavine Str. Mud, 10-20 fm. ; pebbly mud, 5 fm. 



1791. Bela harpularia, Couth. Pebbly mud, 5 fm. 



1793. Margarita helicina, Fabr. Behriiig Str. Clean gravel and algfe, 5 fm. 

 1796. Turionia [? minuta, Fabr.]. Behring Str. Common on sponges, 20-40 fm. 



1798. Lunatia [Acrybia'] aperta, Lov. Kamtschatka. 



1799. Modiolaria nigra. Gray. Arctic Ocean. 



1821. Cha7na lobata [ = exogi/ r a, J Sij, non Conr.]. China Sea, west of Formosa. 

 Shell- gravel, 30 fm. 



1836. Purpura emarginata, Desh. San Francisco. On rocks in 4th level. 



1837. Litorina ploia, Gld. San Francisco. On rocks in 3rd and 4th levels. 



1838. Acmesa textilis, Gld. San Francisco. On piles and rocks between tides, 

 18386. Acmcea patina, Esch. San Francisco. On piles and rocks between lidea. 



1839. Cryptomya Californica, Conr. San Francisco. On sandy beaches. 



1840. Macoma nasuta, Conr. Sfl.n Francisco. Conmion in sandy mud, 1. w. 10 fm. 



1841. CardiumNutlallii, Com. San Francisco. Conmion in sandy mud, 1. w. 10 im. 



71 



