256 Dr. K. C. Schneider on some 
respects it resembles, in the more sloping dorsal margins, in 
having fewer and much more elevated costx, 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 sejuncti, lineis incre- 
menti obsolete pliciformibus instructi, sulcisque angustis spiralibus 
remote sed regulariter punctatis (in anfract. penultimo 5, in ultimo 
circiter 14) cincti, ultimus infra medium leviter constrictus, supra 
caudam oblique tenuiter liratus ; apertura cruleo-albida, longit. 
totius 3 cquans ; columella fusca, callo tenui superne albo-calloso 
induta, plicis quatuor obliquis albidis, suaprema maxima, infima 
minima, instructa. 
Longit. 39 millim., diam. 13; apertura 193 longa, 5 lata. 
Hab, 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 MM. ortentalis, 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 striz 
which adorn the surface of that species are 
scarcely indicated in the present form. 
Mitra Fultont is named atter 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 Celenterates. 
By Dr. Kart CAMILLO SCHNEIDER *, 
In the comparative investigations of various cells and tissues 
of Ceelenterates, which I commenced at Naples in the month 
of March, I arrived at certain histo-morphological results, of 
* Translated from the ‘Zoologischer Anzeiger, xiy. Jahrg., 1891, 
no, 375, pp. 370, 371, and no, 376, pp. 878-881. 
