ON MOLLUSCA OF THE WEST CO.iST OF XORTH AMERICA. 



G53 



287. Calliostoma suprayranosum, n. s. Swollen, with sharp ribs ; posterior 1-4 



granular. 



288. Calliostoma gemmidatiim, n. s. Very swollen : painted like eximinm : with 2 



principal and 2 smaller rows of granules. 



289. Calliostoma splendens, n. s. Orange-chestnut, with fleshy nacre ; small, rather 



flattened, base glossy. 6-40 fm. Cp. 



290. Pliorcus puUifjo, ^i.n,Yt.-\-maculosus, A. Ad. = euri/omphalus, JonsLS-\-marci(hi!S, 



Gld. Subgenus of Gibbuli, with expanded, rounded umbilicus, and tiat 

 whirls ; sometimes obsoletely ribbed. 



291. Gibbula parcipicta, n. s. Like strong growth of Marg. lirulata, var. 



292. Gibbula optabilis, n. s. Wider : decussated between ribs : 2 spiral lines iusidtt 



mnbilicus. 



293. Gibbula funiculata, n. a. SheLiped like Montagut : with rounded spiral riblets. 

 294 Gibbuli succincta, n. s. Small, scarcely sculptured, with spiral brown pen- 



cillings. 



295. Gibbula lacunata, n. s. Very small, nearly smooth ; umbilicus hemmed-in bj 



swelling of columella. 



296. Solariella peramabilis, n. s. Subgenus of Margarita, with open, crenated um- 



bilicus. Species most ornate, with delicate sculptm-e. Umbilicus with 3 

 internal spiral lines, crossed by lirulse : operculum sculptured. Like 3Iinolu 

 aspecta, A. Ad. 40-120 fm. living, Cp. 



297. Margarita cidaris, A. Ad. n. s. Large, knobby, like thin Turcica, with simple 



pillar and small umbilicus. 



298. Margarita pupilla, Gld. yiE.=zcalosto7na, A. Ad. Strong, with sharp rib.s. de- 



cussated between, and fleshy nacre. 8-15 fm. Lgall. 

 298 6. Margarita? Ya,r. salmonea. Between ;«</«//« and undulata : salmon-tin; ed, 

 sculpture fine, not decussated : sutures not waved. 6-40 fm. Cp. 



299. Margarita acuticostata, u. s. Small, painting clouded : 3 sharp ribs on spiie. 



8-20 fm. Cp. 



300. Margarita inflata, n. s. Thin, whirls veiy swollen; sculpture very fine: spiral 



hollow inside keeled umbilicus. 



301. Margarita lirulata, n. s. Small : operc. smooth : 2 sharp principal riblets on 



spire : outline variable. Var. subelevata, raised, livid : var. ohsoteta, sculp- 

 ture evanescent : Y var. conica, very tall, with intercalary ribs, like G.parcv 

 picta. 



302. Margarita Vahlii, Moll. Raised, smooth : operc. with spiral rib. 



303. Margarita temii.^ctdpfa, ? n. s. Like obsoleta, but operc. ribbed. 



304. Marya)ita helieiua, Mout, 



Like the Fimuark shells. 

 139 



CircumborcaL 



