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Show 364 MR. E. A. SMITH O N N E W [Apr. 17, The ground-colour of this species is a very pale fawn ; and stripes and interrupted bands are almost black, generally edged with brown or olive-brown. BULIMUS (DBYM^US) ORTHOSTOMA. (Plate XXXIX. fig. 5.) Testa elongata, ovato-fusiformis, leviter rimata, tenuis, spiraliter tenuissime striata, incrementique lineis sculpta, albida vel fusco-albida, lineis longitudinalibus parum obliquis undulatis purpureo-fuscis et fasciis transversis interruptis (in anfr. superioribus 2, ultimo 3) saturatioribus picta ; spira elongata, con-vexiusculo- conica, apice obtusiusculo ; anfractus 6|, convexiusculi, ultimus elongatus, ad perist. brevissime pone labrum ascendens ; apertura fere recta, elongata, inverse auriformis, longit. totius | paulo minor, intus lilacea, strigis pellucentibus; columella supra contorta, inferne arcuata ; perist. tenue, medio-criter expansum, album, margine columellari extra subrecto. Long. 37 mill., diam. 11|; apertura 18 longa, intus 6| lata. Hab. Ecuador ? The description of this species is very similar to that of B. albo-labiatus; yet the two species when viewed side by side have a very different general aspect. The present species differs in having the aperture rather longer; and the whorls are not constricted just beneath the suture. The markings are not so bold or so deep in colour ; the upper interrupted band is situated nearer the middle of the whorls; and in the last whorl, which has not the reddish line which winds round the base and along the exterior of the lip of B. albo-labiatus, the markings cease at a short distance (about 4-5 millims.) from the labrum, which is pure white within and creamy on the outside like the rest of the shell; in the other species it is pure white on both sides. BULIMUS(LIOSTRACUS)SUBPELLUCIDUS. (PlateXXXIX.fig.2.) Testa fragilis, subpellucida, anguste perforata, elongato-conica, nitida, cornea, transversim obsolete striata, incrementique lineis obliquis sculpta ; anfractus 7, convexiusculi, sutura minute cre-nulata sejuncti; apertura parum obliqua, ovata, longitudinis totius Y eequans; columella superne rectiuscula, vix arcuata; peristoma tenue, undique mediocriter expansum, intus et extra flavescens, margine albido, marg. columellari dilatato. Long. 23 mill., diam. 9 ; apertura 10 longa, intus 4\ lata. Hab. Ecuador. This simple species is chiefly characterized by its thin texture, horny colour, and the yellowish tint of the peristome, the extreme edge of which is whitish. BULIMUS (LIOSTRACUS) FLAVIDULUS. (Plate XXXIX. fig. 3.) Testa profunde rimata vel perforata, ovato-pyramidalis, tenuis, semipellucida, nitida, minulissime spiraliter confertim striata, flavescens, seriebus (in anfract. superioribus 3, in ultimo 5) macularum svbquadratarum fuscarum ornata; spira elongata, |