. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 256 Dr. K. C Schneider on some respects it resembles, in the more sloping dorsal margins, in having fewer and much more elevated costse, in the style of colouring, and the greater inequality of the auricles. I have much pleasure in naming this handsome species after Mr. Walter Crouch, the author of several useful papers on the Mollusca and other branches of the zoology of Essex. Mitra Fultoni. Testa ovato-fusiformis, omnino nigra, sed ad apicem leviter erosa; anfractus 8, conv
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 256 Dr. K. C Schneider on some respects it resembles, in the more sloping dorsal margins, in having fewer and much more elevated costse, in the style of colouring, and the greater inequality of the auricles. I have much pleasure in naming this handsome species after Mr. Walter Crouch, the author of several useful papers on the Mollusca and other branches of the zoology of Essex. Mitra Fultoni. Testa ovato-fusiformis, omnino nigra, sed ad apicem leviter erosa; anfractus 8, convexiusculi, sutura obliqua scjuncti, lineis incre- ments obsolete pliciformibus instructi, sulcisque angustis spiralibus remote sed regulariter punctatis (in anfract. penultimo 5, in ultimo circiter 14) cineti, ultimus infra medium leviter constrictus, supra caudam oblique tenuiter liratus ; apertura caeruleo-albida, longit. totius k a?quans ; columella fusca, callo tenui Buperne albo-calloso induta, plicis quatuor obliquis albidis, suprema maxima, infima minima, instructa. Longit. 3(J millim., diam. 13 ; apertura 19g longa, 5 lata. Bab. Point Abreojos, Lower California. This species is well characterized by the punctate sulci, the punctures falling in regular longitudinal rows, through which pass well-marked impressed lines of growth. It has, I believe, been confounded with M. orientalis, Gray, by some conchologists ; but from that species it may be sufficiently distinguished by the above-mentioned feature and the difference of form. The whorls are more convex, the epidermis blacker, and the fine spiral strise which adorn the surface of that species are scarcely indicated in the present form. Mitra Fultoni is named after Mr. H. Fulton, from whom the specimens were obtained, and through whose agency the British Museum has obtained many valuable additions. XL.—Some Points in the Histology of Coelenterates. By Dr. Karl Camillo Schneidek*. In the comparative investigations of var
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