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Show 1890.] MARINE MOLLUSCA OF ST. HELENA. 259 5-6) pone varices maxime elevatis instructa ; anfractus circa 10, superne concavi, dein angulati, inferne constricti; apertura parva, irregulariter circularis, marginibus fere continuis promi-nentibus circumdata ; canalis mediocriter elongatus, angustus, subclausus, tortuosus, recurvus. Longit. 30 millim., lat. 16. This species is remarkable for the prominent character of the spiral ridges just behind the varices and the deep pits between them. They are produced in a somewhat radiating manner, and form tooth-like projections, giving the edge of the varices a pretty festooned appearance. Although four varices can be counted in any individual whorl, still, as the fourth from the labrum falls very close but not exactly above it, and so on in the other whorls, three disjointed varices are thus formed, and pass very obliquely up the spire. MUREX (OCINEBRA) PATRUELIS. (Plate XXIII. fig. 6.) Testa brevissisme fusiformis, dilute fuscescens, inferne vix rimata; anfract. 7-8, convexi, in medio angulati, costis longitudinalibus circa 9, mediocriter fortibus, lirisque transversis, elevatis, squamosis, in&qualibus (in anfr.penult. 5-6, ultimo circiter 13) instructi; apertura elongata, subpyriformis, longit. totius \ ad&quans, intus pallide fuscescens ; columella supra parum arcuata, inferne oblique tortuosa ; canalis brevis, recurvus. Longit. 10 millim., diam. max. 6|. Apertura 5| longa, 2^ lata. This little species is very like M. diadema of Aradas and Benoit, but has not the liration at the angle of the whorls produced into hollow spines upon the costae. The lirse, also, are more numerous, and the nuclear whorls are differently sculptured. None of the few specimens at hand are quite mature, so I cannot state whether the labrum is smooth or denticulate within. MUREX (OCINEBRA) ALBOANGULATUS. (Plate XXI. fig. 7.) Testa brevissime fusiformis, rufo-fusca, ad angulum anfractuum et basim anfr. ultimi alba; apex rufescens; anfr. 7, apicales 3 convexi, liris tenuissimis longitudinalibus numerosis,paucis-que transversis sculpti, cceteri superne declives, infra medium acute angulati, costis crassis circa 10, lirisque fortibus spiralibus squamulatis (in anfr.penult. 5, in ultimo ad 11) instructi; anfr. ultimus paulo infra medium contractus ; columella callo albo incrassata ; apertura albida, longit. totius \ subcequans labrum incrassatum, intus denticulatum. Longit. 8 millim., diam. max. 5g. This species has the general aspect of certain Coralliophilce, and might be placed with that group provisionally until the animal and opeculum are known. It differs from M. patruelis in having smaller apical whorls, in coloration, and in sculpture, the transverse or spiral ridges being somewhat finer and more squamose. |