LITTORIN A. 



Species i7. (Mus. Cuming.) 

 LiTTORiNA Fraseri. Lift, testa acuminato-ovatii, aii- 

 frfictibiis decUvi-convexis, subventricods, vaUde cre- 

 briliratis; livido-purpurascente, nitente, undique rvfo- 

 punctatd ; aperturd semicircular i, columella late ex- 

 cavatd. 

 Fhaser's Littorina. Shell acmuinately ovate, whorls 

 slantingly convex, subventricose, strongly closely 

 ridged ; livid-purple, shining, everywhere red-dotted ; 

 aperture semicircular, columella broadly excavated. 

 Hnh. Lagos, West Africa ; Fraser. 



A thin but solid shell, deeply closely grooved, tbe in- 

 termediate ridges being tessellated with dark purple-red. 



Species 48. (Fig. a, b, Mus. Cuming.) 



LiTTORiNA tessellata. LM. testa acuminalo-ovatd, 

 anfractibus ad sutnram impressis, deinde ventricosis, 

 inferne obtuse aiiffulatis, nudigue tenue lineari-snlca- 

 tis ; virescente-albd, punctis pitrpureo-r/ifis undljue 

 dense tessellata; columella late excavatd. 



The tessellated Littorina. Shell acuminately ovate, 

 whorls impressed at the suture, then ventricose, ob- 

 tusely angled at the lower part, everywhere finely 

 linearly grooved ; greenish-white, densely tessellated 

 throughout with dark purple-red dots ; columella 

 broadly excavated. 



PniLiPPr, Abbild. und Besch. Conch, pi. .5. f. 26. 

 Littorina nndulata, D'Orbigny. 



Hab. West Indies. 



Neatly tessellated throughout uith dark purple-red, the 



spots mostly forming oblique waved streaks. 



Species 49. (:Mus. Cuming.) 



Littorina Sitchana. Lilt, testa semiglobosd, injlatd, 

 spird parvd, ohltisd, anfractibus convexis, nunc lavi- 

 biis, nunc spiraliter liratis ; nigra, iirescente medio et 

 ad stduram fasciatd ; aperttvrd circulari, labro exca- 

 vato-dilataio. 



The Sitka Littorina. Shell semiglobose, inflated, spire 

 small, obtuse, whorls convex, sometimes smooth, 

 sometimes spirally ridged ; black, banded in the 

 middle and at the suture with greenish-vvbitc'; aper- 

 ture circular, lip excavately dilated. 



Philippi, Pro. Zool. See. 1845, p. 140. 



Hab. Sitka. 



A very characteristic semiglobose inflated shell, of solid 



growth, more or less strongly keeled. 



Species 50. (Fig. a, b, Mus. Cuming.) 

 Littorina carinata. Lilt, testa pyramidali-conoided. 



anfractibus plano-declivibus, spiraliter lineari-sulcatis, 

 inferne cnrinatis, infra subconcavis ; albidd, intense 

 plumbeo-c^ruleo fasciatd, pmpureo-rufo oblique unda- 

 to-strigafd ; aperturd parvd, columelld late excavatd. 



The keelkd Littorina. Shell pyramidally conoid, 

 whorls flatly slanting, spirally linearly grooved, 

 keeled at the lower part, slightly concave beneath ; 

 whitish, banded with deep leaden blue, obliciucly 

 wave-streaked with purple-red ; aperture small, colu- 

 mella broadly excavated. 



D'Orbigny, Moli. de (;uba, p. 209. pi. 1."). f. 1-4. 



Eab. Cuba. 



A solid shell, of very eharactcrislio form and pattern of 



colouring. 



Species 51. (Fig. a, b, Mus. Cuming.) 



Littorina brevicula. Litt. testa rjloboso-turbinatd, 

 soUdiusculd, spird brevi, acutd, anfractibus declivi- 

 aiigulatis, valide spiraliter carinatis, carinis distanti- 

 biis, interstitiis striatis ; albidd, nigro tinctd, riifo et 

 viridi macnlatd ; aperturd circulari, columelld liiti 

 excavatd et dilatatd. 



The shout Littorina. Shell globosely turbinated, ra- 

 ther solid, spire short, sharp, whorls slantingly an- 

 gled, strongly spirally keeled, keels distant, inter- 

 stices striated ; whitish, stained with black, blotched 

 with red and green ; aperture circular, columella 

 broadly excavated and dilated. 



Turbo brevirulus, Philippi, Zeitschrifl fiir Malac. 1844, p. 

 166. 



Hab. North coast of China. 



Of broad Turbo-Y\ka form, encircled with three strong 



keels, and prettily variegated with colour upon a dark 



"round. 



S])ccies 52. (Mus. Cuming.) 



Littorina Grucnlandica. Lilt, testa ovato-ventricosd, 

 fenuiculd, anfractiLua convexis, spiraliter obsolete li- 

 ratis ; Uvido-castaned ; columelld dilatatd. 



The (Jkeenland Littorina. Shell ovately ventricose, 

 rather thin, whorls convex, spirally obsoletely ridged ; 

 livid-chestnut ; columella broadly dilated. 



Menke, Syn. Moll. 1830, p. 45. 

 Littorina sulcata, Menke. 

 Littorina castanea, Deshayes. 

 Nerita litorm, Fabricius. 



Hab. Greenland. 



Of rather light structure, sometimes banded, with tlu- 

 columellar lip conspicuously excavately dilated. 



June, 1857. 



