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 ])leasure in naming this handsome species 

 after Mr. Walter Crouch, the author of several useful papers 

 on the MoUusca and other branches of the zoology of Essex. 



Mitra Fultoni, 



Testa ovato-fusiformis, omniiio nigra, ?ed ad apieem leviter erosa ; 

 anfractus 8, convcxiusculi, sutura obliqua sejuncti, lineis incre- 

 mcnti obsolete pliciformiLus iiistructi, sulcisquo angustis spiralibus 

 remote sed rcgulariter punctatis (in anfract. penultimo 5, in ultimo 

 circiter 14) ciucti, ultimus infra medium leviter constrictus, supra 

 caudam oblique tenuiter liratus ; apertura carulco-albida, longit. 

 totius h toquaus ; columella fusca, callo tenui superne albo-calloso 

 induta, plicis quatuor obliquis albidis, suprema maxima, infiraa 

 minima, instructa, 



Longit. 39 millim., diam. 13 ; apertura 19| longa, 5 lata. 



Hah. 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 stride 

 which adorn the surface of that species are 

 scarcely indicated in the present form. 



Mitra Fultoni is named after Mr. II. 

 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 Schneider*. 



In the comparative investigations of various cells and tissues 

 of Coelenterates, which I commenced at Naples in the mouth 

 of J^larch, I arrived at certain histo-morphological results, of 



* Traualatod from the * Zoologi.''cber Anzeiger,' xiv. Jahrg., 1S91, 

 no. 37o, pp. .'570, .'^71, and no. ,'i7l), pp. .'{78-381. 



