106 MURICIDiB, 



long ; canal very short, wide ; outer lip thickened and dentate 

 within. Varices nearly obsolete. 31. miliaris, Gmel. (xliii, 9). 



ociNEBRA, Leach. (Muricopsis and Corallinia, Bucq. and 

 Dautz.) Spire elevated ; canal more or less closed ; varices 

 foliated, sometimes spinose. M. erinaceus^ Linn, (xliii, 10). 



This group, as well as Muricidea, is made by Messrs. Adams 

 an omnium gatherum,mc\u.d\ng true Murices,purpuroid Murices, 

 Purpurse, Fusidse, etc. Muricidea as defined by them has no 

 really distinctive characters from Ocinebra, and Swainson 

 included species of Trophon, Triton, etc. I have suppressed 

 Muricidea, and retained Ocinebra for a group of small Murices 

 with numerous varices and purpuroid operculum ; the species 

 having muricoid operculum should be relegated to Phyllonotus, 

 from which they do not differ. * 



PTEROHYTUS, Conrad. Not characterized. The type has lamellar 

 varices like Gerostoma foliatiivi^hnt more numerous than in that 

 group, and the outer lip has a tooth. I think it may be safely 

 relegated to Phyllonotus, Swains. M. uinhrifer^ Conr. (xliii, 11). 

 Miocene ; Yirginia. 



Urosalpinx, Stimpsou. 



Syn. — Adamsia, Dunker. Agnewia, T. -Woods. 



Distr.—'iO recent species. Atlantic Coast of America, Cape 

 Horn, Cape of Good Hope, New Zealand, etc. U. Floridana, 

 Conr. (xliii, 12). 



Fusiform. No proper varices, which are replaced by longi- 

 tudinal ribs. 



Shell elongated oval, or short fusiform, longitudinally ribbed 

 or undulated and spirally striated ; aperture with a short canal ; 

 outer lip dentate and Urate within. Operculum somewhat like 

 that of Purpura, semicordate, with the nucleus at the outer edge 

 a little below the middle. Lingual dentition nearly like that of 

 Trophon. 



It differs from Trophon in its operculum, and from Ocinebra 

 in its smoother shell, want of distinct varices, and open canal. 



Urosalpinx cinerea occurs upon the Atlantic coast of the 

 United States from Maine to Florida. The animal is small, foot 

 scarcely covering the aperture, very little dilated at the front 

 angles, cream-colored, margined with lemon-color beneath, punc- 

 tured with light drab above ; siphon merel}^ surpassing the tip 

 of the canal ; head scarcely pi-otruded ; tentacula nearly united 

 at origin ; eyes black, at the outer upper third of tentacula, 

 which third is a mere filament, contractile. Motions sluggish. 

 Littoral. The eggs are contained in small transparent mem- 

 branous parchment-like vases, each of which is attached by an 

 expanded foot to some solid substance, usually the under surface 

 of an overhanging rock, a little above low-tide mark. Each 

 female deposits from ten or twelve to more than a hundred of 



