| OCR Text |
Show 1867.] MR. H. ADAMS ON NEW SHELLS. 307 mellari paulo minore, ilii parallela ; perist. simplici, margine dextro vix expansiusculo, intus medio unidentato, columellari calloso, dilatato. Long. 4, diam. 2\ mill.; ap. 2 mill, longa. Hab. Port Louis Harbour, Mauritius. PLECOTREMA EXIGUA, H. Ad. (Pl. XIX. fig. 15.) P. testa profunde rimata, ovato-conica, solida, spiraliter valde sulcata, longitudinaliter striata, pallide fulva; spira conoidea, apice mucronata; anfr. 8, planiusculis, infra suturam sulco profundo et lato exaratis, ultimo basi attenuato, pone aperturam valde cristato; apertura subobliqua, angusta; plicis parie-talibus 2, superiore tuberculiformi, altera bipartita ; plica columellari compressa, subhorizontali ; perist. simplici, marginibus callo crasso junctis, dextro intus incrassato, tridentata, dente superiore minuto, columellari dilatato, patente. Long. 6, diam. 3^ mill. ; ap. 2 mill, longa. Hab. Trou d'Eaux Douces, Mauritius. 8. Descriptions of New Species of Shells. By H E N R Y ADAMS, F.L.S. (Plate XIX.) NANINA (?ROTULA) CONULUS, H. Ad. (Pl. XIX. figs. 16, 16a.) N. testa imperforata, trochiformi, tenui, oblique striata, superne liris spiralibus obsoletissimis signata, rubello-cornea, ad carinam et ad suturas pallidiore; spira conoidea, apice obtusius-cula, sutura distincta; anfr. 6, convexiusculis, ultimo non descendente, carinato, basi convexo; apertura subobliqua, te-tragono- lunari; perist. recto, acuto, marginibus convergentibus, columellari verticali, superne breviter reflexo. Diam. maj. 11, min. 10, alt. 12 mill. Hab. Newera Ellia, Ceylon (Coll. F. Layard). . This species, which is closely allied to N. concavospira, Pfr., was obtained by Mr. Frederick Layard from Newera Ellia, Ceylon, at an elevation of 6500 feet above the level of the sea. I have referred it with doubt to the subgenus Rotula, the animal of the typical species, N. detecta, not being known. In the figure given of the animal, in this case, the truncature of the foot is distinctly shown ; while the animals of certain Indian species, considered by Mr. W . T. Blanford to belong to the same subgenus, are without such truncature, the mucus-pore being above the flattened posterior extremity. BULIMULUS (ENA) PUSILLUS, H. Ad. (Pl. XIX. fig. 17.) B. testa sinistrorsa, rimato-perforata, cylindrico-turrita, tenui, incequaliter striata, vix nitidula, olivaceo-fusca; spira elongata, sursum parum attenuata, apice obtusiuscula, sutura distincta |
