ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 



661 



427. Tiichotropis cancellata, Hds. Sulph. Sculpture strong, open. Epidermis bristly. 



428. Trichotropis inei-mis, Hds. Sulph. Sculpture faint : not bristly. 



Family VelutinidcB. 



429. Velutina Itsvigata, Linn. Fbs. & Hani. Exactly accords witb Britisb speci- 



mens. ? = Kamtschatkana, Desh. 



430. Vehdina prolongata, 10.. s. Spire very small. Labrum produced in front. 



Family Naticida. 



431. Natica clausa, Brod. & Sbv. Umbilicus closed. Operc. shelly. Oiroumboreal. 



432. Lunatia Letinsii,Qldi.li.il. = hei-cult:sa,Miii. Whu'ls flattened behind. Abun- 



dant on beach, Cp. 



433. Lunatia pallida, Br. & Sby. = caurina-\-soluta, Gld. Globular, compact, whitish. 



Boreal. 



434. Neverita Rechmana, Petit, Rve. Large, solid, raised, with brown grooTed 



limip on pillar. Also Guaymas. 



Family Tritonidm. 



435. Priene Oregonensis, Eedf. Like cancellata, but coarser sculpture. 6 fm. lA/all. 



436. Ranella Oalifornica, Hds. Sulph. Scarcely differs from fine specimens of R. 



ventricosa, in Mus. Cum. 



Family Fasciolaridce. 



437. Mitra maura, Swains. Nntt. =:orientalis,Qiaj='Chilensis, Gray,'Kien. Very 



dark and plain. Peru. Sand between rocks, 1. w. Cum. Peru. 



Family Marginellidce. 



438. Marginella Jewettii, Cpr. P. Z. S. 1856, p. 207. Like the Mogador species, 



somewhat shorter and broader. 10-20 fm. Cp. 



439. Marginella subtrigona, n. s. Shape of Erato columhella. 



440. Marginella rec/utaris, n. s. Between Jewettii and minor, 0. B. Ad. Maz. Cat. 



no. 587. Beach-20 fin. Cp. 



441. Volutella pyriformis, n. s. Genus of Swainson (not D'Orb.) = Closia, Gray. 



Like V. margaritvla, Maz. Oat. no. 589, but produced in front. 



442. Volvarina varia, Sby. 0. S. Lucas, W. Indies. 



Family Olividee. 



443. Olivella biplicata, Sby. Tlsiak.=glandinaria, Nutt. Nut-shaped. 



444. Olivella hcetiea, n. s. " NaiTow, dull, thin : has been erroneously called anazora, 



tergina, petiolita, and rujifasciata. 



147 



