ON MOLLrSCA OF THE WEST COAST OF NORTH AMERICA. 



bbb 



322. Caecum crebricinctum. 



.323. Conperi 



.324. Turritflla ("ooperi ... 



.32.5. Jewettii 



32G. Mesalia lacteola 



320 6. var. siihplanata 



327. tenuisculpta . . . 



•328. reritbidea snoiata . . . 



329. Bittium tilosiiiu 



320 i. ?r«r. esuriens . 



3.3'). attenuatum 



3;U. qiiadrifilatum . . . 



332. asperuni 



3.33. arniilbitum 



•3.34. fa>tis:iatum 



•3.35. Litorina jdanaxis 



330. Sitchana 



Nutt 



MB 



Jew. 



Bfs. - 



C 

 B 



— 'B/«. 

 B fs. 



b 



c c 



Family Caeides, 



Cercttm crebriclnrfum, n. s. Larere, with aspect oi Elephanfuhnn, but very fine 

 close annular sculpture ; plu^ subun;>-ulate. 8-20 fin. C'/>. 

 323. Ccecum Cooperi, n. s. Small, with 30—40 sharp narrow rin^-i 



822. 



Family Turritellidee. 



324. Turritella Cooperi, n. a. Extremely slender, with many narrow whirls, c. P;>, 



32.J. Turrifel/a Jewettii, n. s. Like sanguinea, with very faint sculpture. 



320. Blesalia lacteola, !' n. s. May be a local var. of the circumpolar lactea, with 



altered sculpture : distinct, teste Cuminnr. 

 32(5 b. Mcsalia ?var. subplanafa. Sculpture fainter : whirls flattened. 

 327. Me-vi/ia tenuisculpta, n. s. Veiy small, slender, whirls rounded, lip waved. 



tjh 1-water, Cp. 



Family Cerithiada. 



823. Cerithidea sacraf a, Old. T!..F,.= Californicn, ISutt.-^pidfafa, GM. Variable in 

 shape and sculpture : pa-^ses into MazatJanica, Maz. Cat. no. 395. 



829. * liittmm JilosHm, Gld. ij.E. = Eschrichtii, Midd. Strong, broad, grooved. 



3296. Bittium ? var. esuriens. Like starved Ji/osum, very narrow, adult scarcely 

 .sculptured. 



330. Bittium attenuatum, n. a. Like plicatum, A. Ad., or drawn-out esuriens, with 



threads instead of grooves. 



331. *Bittium quadrijilatum, n. s. Broad : 4 threads, equal from beginning, coiling 



over strong radiating ribs. 

 8-32. *Bittium asperum, n. s. Same aspect : upper whirls with 2 strong and 2 faint 



keels over less prominent ribs. Bch.-40 fm. Cp. 

 313. * 'litfiiim armiUatum, n. s. Same aspect : 3 nearly equal rows of knobs. 

 334. Bittium fadiyiatum, n. s. Small, slender : apex normal : sutures indented, 



anterior rib strong. 



Family Litorinidee. 



835. Litorina planaxis, ^\xti. V\n\.^patula, Gld. E.E. Outside plain j columella 

 scooped. 



330. Litorina Sitchana, F]ii\.=sulcafa, G\i.=rudis, Coop. Rounded, flat, with spiral 

 ribs. Var. modesta, Phil, (pars) has sculpture faint: subtenebrosa, 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- 

 thiHiti 111 Kiitsoa: perhaps they are related to Aiaba. T le nucleus oi esurivrus and 

 attenuatum ha.s not been seen. 



141 



