ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 



653 



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



granular. 



288. Calliostoma gemmulatum, n. s. Very swollen : painted like eximium : with 2 



principal and 2 smaller rows of granules. 



239. Calliostoma splendens, n. s. Orange-chestnut, with fleshy nacre j small, rather 

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



290. Phorcus pulligo, Si&rt.+matvlowi, A. Ad.=eurt/dmphalus, Jonas+marcidus, 



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

 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 insido 



umbilicus. 



293. Gibbula funiculata, n. s. Shaped like Montagui: with rounded spiral riblets. 

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



cillings. 



295. Gibbula lacunata, n. s. Very small, nearly smooth ; umbilicus liemmed-in bt 



swelling of columella. 



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



bilicus. Species most ornate, with delicate sculpture. Umbilicus with 3 

 internal spiral lines, crossed by lirulae : operculurn sculptured. Like Minolu 

 aspecta, A. Ad. 40-120 fin. living, Op. 



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



pillar and small umbilicus. 



298. Margarita pupilla, Gld. E.E.=e/osfow, A. Ad. Strong, with sharp ribs, de- 



cussated between, and fleshy nacre. S-15 fm. Lyall. 



208 b. Margarita ? var. salmonea. Between pupilla and undulata : salmon-tinted, 

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



299. Margarita acuticostata, n. s. Small, painting clouded : 3 sharp ribs on gpire. 



8-20 fm. Cp. 



300. Margarita inftata, n. s. Thin, whirls very swollen ; sculpture very fine j spiial 



hollow inside keeled umbilicus. 



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

 spire : outline variable. Var. subelecata, raised, livid : var. obsoleta, sculp- 

 ture evanescent : ? var. cornea, very tall, with intercalary ribs, like G. parci* 

 picta. 



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



303. Margarita tenuisculpta, ? n. s. Like obsoleta, but operc. ribbed. 



804. Margarita helicina, Mont. Like the Finmark shells. CircumborcaL v 



139 



