The Annals and magazine of natural history; zoology, botany, and geology . s, they all confirming my own andMr. Buttons views that it could hardly be referred to anyknown species. Cyprcea {Trivia) galapayensis, sp. n. C. (Trivia) testa ovato-rotunda, parva, nigrescenti-purpurea, lateri-bus paullum dilatatis, extremitatibus vix productis, obtusis, costisnumerosis, crassis, laevibus, pallide cinereis, dorsaliter apudmedium superficie callosa omnino obtecta, versus extremitatetnutramque callositatis, velut ocello, albo-maculata, nitidissima, basicoDvexiuscula ; apertura arcuato-recta ; columella
The Annals and magazine of natural history; zoology, botany, and geology . s, they all confirming my own andMr. Buttons views that it could hardly be referred to anyknown species. Cyprcea {Trivia) galapayensis, sp. n. C. (Trivia) testa ovato-rotunda, parva, nigrescenti-purpurea, lateri-bus paullum dilatatis, extremitatibus vix productis, obtusis, costisnumerosis, crassis, laevibus, pallide cinereis, dorsaliter apudmedium superficie callosa omnino obtecta, versus extremitatetnutramque callositatis, velut ocello, albo-maculata, nitidissima, basicoDvexiuscula ; apertura arcuato-recta ; columella hand varicosa. Long. 8, lat. 5-75 mm. (spec. maj.).„ 7, „ 5 „ (spec. min.). Hah. Insula Albemarle, e grege Galapagensi. This particularly interesting and select form, of which Ihave seen three specimens, as just stated, collected for theStanford University of California by Mr. Snodgrass, differsfrom sanguinea, Gray, in its much smaller size, distinctcoloration, being blackish purple instead of madder-brown,and more numerous ribs, these being flatter and thicker in. Cyprcea galapagensis. proportion. But the chief peculiarity consists in the shiningenamelled callosity over the whole centre of the dorsal region,completely obliterating the sulcus, if any exists, which I: Two Species of Cypraja. 209 doubt, and further rendered conspicuous by two white spots,one towards either extremity, at the point of junction of theribs wirh the callosity, and both quite covered by it. Affinity also exists between galapagensia and prdla, Gask.,and likewise subrostrata, Gray, both inhabitants also of theGalapagos group. These small species are much of the samesize, the latter possessing a decided sulcus, and with beakedextremities—hence its trivial name; whilst puUa is lessglobose, having tine ribs, with hardly any definition even ofa sulcus. No trace of any dorsal callosity has, so far as I am aware,ever been found in any other Trivia such as exists in thespecies before us. Cyprcea (Trivia
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