204 REFERENCE TO PLATES. 



Species. Pagb 



Cassis granulosa, Brug 43 



Dolium galea, Linn 43 



jierdix, Linn 43 



Cerithiopsis Emersonii, Ad 44 



terebralis, Ad 44 



Acus dislocatns. Say 45 



Oliva literata, Lara 46 



nintica, Say 46 



Pleurotonia bicaiinata. Couth 47 



brunnea, Perkins 47 



cerina, K. & S 48 



Bela tnrricula, Leach 48 



harpulaiia. Couth 49 



pleurotoMiaria, Couth 49 



cancellala, M. & A 49 



trevelliana, Turtou flO 



violacea, M. & A SO 



Mangelia filiformis, Holmes 52 



Voluta Junouia, Cliemu 53 



Mitra granulosa. Lam 53 



Marginella guttata, Dillw 63 



roscida, Redf 53 



Porcellana exanthema, Liun 55 



Trivia quadripunctata, Gray 55 



Volva uniplicata, Sowb 56 



Natica afflnis, Gmel 58 



pusilla, Say , 58 



Lunatia lieros. Say 59 



Grocnlandica, Rliill 69 



Neverita duplicata, Say 60 



Mamma immaculata Tutten 60 



Bulbus Smithii, Brown 60 



Amaurop,''is Islaudica, Gmel 61 



Sigaretus per.'^pectivas, Say 61 



maculal us, Say 61 



Marsenia perspicua, Liun 62 



Velutina Ixvigata, Linn 62 



zonata, Gld 62 



Obeliscus crenulatus, Holmes 64 



TurbouiUa interrujita, Totten 64 



nivea, Stimp 64 



elegans, Verrill 65 



OdoBtomia producta. Ad 66 



f usca, Ad 66 



dealliata, Stimp 67 



raodesta, Stimp 67 



bisuturalis. Say 67 



trifida, Totten 67 



semiduda, Ad 68 



impressa, Say 68 



Aclis polita, Verrill 69 



Menestho striatula Couth 69 



Euliraa oleacea, K. & 8 69 



Apporhais oecidentalii'. Berk 18 



Cerithium ferrugineum, Say Jl 



Bittium nigrum, Totten 71 



Greeuii, Ad 72 



Tiiforis nigrociuctus, Ad 72 



Turritella erosa, Couth 73 



reticulata, M. & A 73 



costulata, M. & A 74 



acicula, Stimp 74 



radicula, Stimp 74 



Caecum pulchellum, stimp 75 



co?tatum, Verrill 76 



Scalaria Nov-Anglia;, Couth 76 



lineata, Say 76 



Grojnlandica, Chemn 77 



angulata, Say 77 



turbinata, Conr 77 



multistriata. Say 77 



borealis, Beck 78 



Littorina dilatata, Orb 79 



rudis, Donov 79 



tenebrosa, Mont 79 



lilorea, Linn 80 



palliata, Say 80 



irrorata, Say 80 



