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Show 306 MR. H. ADAMS ON NEW MAURITIAN SHELLS. [Mar. 14, gularibus subdistantibus munitis; apertura vix obliqua, subcirculari ; perist. simplici, marginibus approximatis, callo junctis, margine dextro recto, columellari mediocriter expanso. Diam. maj. 14, min. 12, alt. 17 mill. Hab. The Pouce Mountain, Mauritius. CYCLOSTOMUS SCABER, H. Ad. (Pl. XIX. fig. 11.) C. testa profunde umbilicata, globoso-turbinata, tenuiuscula, costulis subdistantibus et longitudinaliter striis decussata, basi costulis spiralibus propioribus, in umbilico pallide carnea, fascia rufa angusta infra peripheriam ornata; spira turbinata, apice obtusiuscula; anfr. 5, convexis, ultimo rotundato; apertura verticali, circulari; perist. simplici, recto, continuo, superne subangulato, breviter adnata. Diam. maj. 12, min. 10, alt. 11 mill. Hab. The Pouce Mountain, Mauritius. OMPHALOTROPIS COSTELLATA, H. Ad. (Pl. XIX. fig. 12.) O. testa umbilicata, ovato-conica, tenuiuscula, spiraliter costulis filiformibus subdistantibus, circa umbilicum remotioribus, superne fere obsoletis munita, pallide carnea, versus apicem rubida, strigis fulguratis rufis picta ; spira conica, apice sutura profunda ; anfr. 7, convexiusculis, ultimo in umbilico liris eequalibus munito ; apertura subverticali, ovali; perist. recto, acuto, marginibus callo tenui columellari subincrassato, expaniusculo. Long. 10, diam. 7 mill.; ap. 6 mill, longa. Hab. The Pouce Mountain, Mauritius. OMPHALOTROPIS PICTURATA, H. Ad. (Pl. XIX. fig. 13.) O. testa perforata, ovato-conica, oblique confertim striatula, corneo-rufa, maculis et strigis albis notata ; spira conica, acuminata, sutura submarginata et crenulata ; anfr. 6, convexiusculis, ultimo rotundato; apertura subverticali, oblgngo-ovata; perist. simplici, margine dextro recto, columellari expansiusculo. Long. 6, diam. 3 mill.; ap. 2 mill, longa. Hab. The Pouce Mountain, Mauritius. " The animal in this species has the tentacles yellow, tipped with dark brown ; the foot almost white; the mantle a kind of gre) (varying), with its sides dark brown, and the same colour between the tentacles."-G. Nevill. CASSIDULA PARVA, H. Ad. (Pl. XIX. fig. 14.) C. testa subperforata, ovato-conica, solidula, spiraliter confertim costulata (prope suturam costulis majoribus), longitudinaliter minute striata, sordide alba; spira conica, apice mucronata; anfr. 6, convexiusculis, ultimo basi attenuato, antice crista munito; apertura subobliqua, ovali; plica parietali 1, compressa, subtransversa, nodulo supero obsoleto; plica colli- |
