OC ——E—EEEEEE SE 
ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 655 
Nutt.| Jew. |B. A.||Smiths, Ins.) Ken. | Lord.|Swan. Cooper. 
322. Ceecum crebricinctum,.,.) — | — | — — —j|;—j|;—| MDI 
823, BOOPOLI 25-55 havi ssowes =) >> — —|—|— DI 
324, Turritella Cooperi ...... —|— — —|—;—]| DI 
525. Jewettal. 3)... 24:50 — |B fs.| — || D Pfos. | — | — | — — 
326. Mesalia lacteola ........ ae Se tse — | P|Vji=— — 
326 b. var, subplanata ..| — | — | — — P|—|V — 
327. tenuisculpta ...... = Sa) = — —|-—|— D 
328. Cerithidea sacrata ...... MB|.C | C CF |—j|—|— FD 
329, Bittium filosum ........ —;—|P Ae Pie Vaal Ni -- 
329 6, Pvar. esuriens —|B|— — —|;—|V MD 
330. attenuatum........ —}—|— M | —}]—}— — 
331. quadrifilatum...... —|—|— D —|—|— D 
332, —— asperum ...,...... — Bfs.. — — —|;—|— DI 
333, —— armillatum........ — Bfs.| — —- |}—|—}— D 
334, fastigiatum ........ —|B = —)—}— — 
335. Litorina planaxis........ €.-Gye FDI |; —|—/|—); MDI 
336, SHGHANA) os. ote: 2 4.4:> —j|— | 0 PO Bulk Virus — 
Family Cecide. 
322. Cecum crebricinctum, n.s. Large, with aspect of Elephantulum, but very fine 
close annular sculpture; plug subungulate, 8-20 fm. Cp. 
323, Cecum Cooperi, n.s, Small, with 30-40 sharp narrow rings. 
Family Turritellide. 
324, Turritella Cooperi, n.s. Extremely slender, with many narrow whirls, c. Cp, 
325. Turritella Jewettii, n.s. Like sanguinea, with very faint sculpture. 
326. Mesalia lacteola, ?n.s. May be a local var. of the circumpolar Jactea, with 
altered sculpture: distinct, teste Cuming. 
3266, Mesalia Pyar. subplanata. Sculpture fainter: whirls flattened. 
327. Mesalia tenuisculpta, n.s. Very small, slender, whirls rounded, lip waved. 
Shoal-water, Cp. 
Family Certthiade. 
328. Cerithidea sacrata, Gld, E.E.= Californica, Nutt.+-pullata, Gld. Variable in 
shape and sculpture: passes into Mazatlanica, Maz. Cat. no. 395. 
329. *Bittium filosum, Gld. K.E.=LEschrichtii, Midd, Strong, broad, grooved. 
529b. Bittium ? var. esuriens. Like starved jilosum, very narrow, adult scarcely 
sculptured. 
330. Bittium attenuatum, u.s. Like plicatum, A. Ad., or drawn-out esuriens, with 
threads instead of grooves. 
331, *Bittium quadrifilatum, n. 8. Broad: 4 threads, equal from beginning, coiling 
over strong radiating ribs. 
332, *Bittium asperum,n. 8s. Same aspect: upper whirls with 2 strong and 2 faint 
keels over less prominent ribs. Beh.—40 fm. Cp. 
333. *Bittium armillatum, n. 8. Same aspect: 3 nearly equal rows of knobs. 
334, Bittium fastigiatum, u.s. Small, slender: apex normal: sutures indented, 
anterior rib strong. 
Family Litorinide. 
835, Litorina planacis, Nutt. Phil.=patula, Gld. E.E. Outside plain; columella: 
scooped. 
336. Litorina Sitchana, Phil.=suleata, Gld.=rudis, Coop. Rounded, flat, with spiral 
ribs. Var. modesta, Phil. (pars) has sculpture faint: swbtenebrosa, Midd., is 
perhaps a degraded var. Rocks between tides, Lord; 8-10 fm. Lyall [?). 
* These species have so peculiar a nucleus that they can scarcely rank near Ceri- 
thium or Rissoa: perhaps they are related to dlaba, The nucleus of eswriens and 
attenuatum has not been seen. 
