OCR Text |
Show 128 MR. G. B. SOWERBY ON NEW SPECIES OF SHELLS. [Mar. 2, 6. MITRA INDUTA. (Plate XXIV. fig. 9.) M . testa acuminato-fusiformi, epidermide atro-fusca induta, leevigata, obsolete striata, basin versus valide sulcata; spira acuta; basi leviter attenuata; anfractibus 9, subrotundatis ; apertura oblonga, carnea ; columella rectiuscula, triplicata ; labio externo arcuato, tenui, minutissime crenulato; intus Icevi. Long. 33, maj. lat. 11 ; anfr. ult. maj. long. 21 ; apert. long. 16, lat. 4 mill. An acuminately fusiform Mitra, covered with a dark brown epidermis, nearly smooth, very obscurely striated, but strongly grooved towards the base; spire acute; base somewhat attenuated; whorls 9 in number, rather rounded ; aperture oblong, flesh-colour ; columella nearly straight, three-plaited; outer lip arched, thin, very minutely crenulated ; interior smooth. Obs. A species quite distinct from any hitherto described; it makes an addition to the Mitrce with dark epidermis, such as M. 'orientalis, nigra, &c. 7. OVULUM DEPRESSUM. (Plate XXIV. fig. 1.) O. testa elongata, angustata, depressa, antice producta, utrinque attenuata et bicuspidata, polita, minutissime striata, alba, ex-tremitatibus aurantiaco tinctis; basi concavo-depressa; apertura angusta, postice dilatata. Long. 21, maj. diam. 5, min. 2 mill. Hab. North-west Australia (Capt. Denicke). A narrow depressed Ovulum, produced in front, both ends attenuated and terminating in two points, polished, very finely striated, white, tinged with orange at the extremities; base concavely depressed ; aperture narrow, rather more open towards the hinder part. 8. ADMETE TABULATA. (Plate XXIV. fig. 3.) A. testa oblongo-turrita, spiraliter costata (costis planato-con-cavis), longitudinaliter obscure plicata, albida, epidermide pallide fuscescente induta; anfractibus 7, convexis, superne angulatis, supra angulum subconcavo-depressis; apertura oblongo-ovata ; columella rectiuscula, minute plicata. Long. 22, maj. lat. 10 mill., apert. long. 9, lat. 4^ mill. Hab. Arctic Ocean. A n Admete of an oblong turreted form, spirally ribbed, ribs slightly concave; longitudinally obscurely plicated; whitish, covered with a pale brown epidermis ; whorls 7 in number, convex, angled above, concavely depressed above the angle; aperture oblong-ovate; columella nearly straight, minutely plicated. Obs. The species of the genus Admete (Moller), by some included in Cancellaria, are all northern; the type is A. viridula (Gould) ; and the species at present known are A. crispa (Moller), couthoyi (Jay), grandis (Forbes), abnormis (Gray), borealis (A. Adams), and ciliata (Kriiger). |