CRETACEOUS FOSSILS. 421 



GASTEROPODA. 



SIPHONOSTOMATA. 



FASCIOLAKIIDJ]. 

 Genus FASCIOLARIA Lam 



FASCIOLARIA (CRYPTORHYTIS) FUSIFOUMIS. 



Plate 12, fig. 12. 



Rostellaria fusiform i ft H & M.., Mem. Aia. Acad. Arts and Sci., vol. v, 2d ser., p. .3.3.3, 



PI. iii, fig. 10. 

 Gladius ? cheijennensis M. & H., Proc. Acad. Nat. Sci. Phil., vol. 12, p. 422. 

 Gladins cheyennerms (IM. & H.) Meek, Smitbsouiau Check list luveit. Foss., p. 20. 

 Fasciolaria {Cryptorhyth) cheyennensis Meek, Pal. U. S. Geol. Surv. Terr., p. 365, PI. 



19, fig. 13. 



Shell of moderate or large size, fusiform, spire elevated, composed of 

 six or more somewhat rounded or slightly ventricose volutions, gradually 

 increasing in size to the last, which is rather more gibbous above the middle, 

 very rapidly contracted below, and extended to form a slightly twisted 

 anterior beak of moderate length, which, with the aperture, forms rather 

 more than one-half the entire length of the shell. Aperture obliquely-ovate, 

 obtusely pointed above, prolonged and extended into the canal below ; outer 

 lip thin and sharp ; inner lip thin and slightly coated ; volutions marked by 

 strong, flexuous, vertical plications or folds, and by finer intermediate stria^ 

 of growth; suture deep and distinct The vertical folds terminate abruptly 

 just below the suture line, leaving a narrow, smooth, and slightly concave 

 space bordering the suture. Columellar fold not seen on our specimens. 



This is a distinct and well-marked species, and will not be readily con- 

 founded with any other described from American rocks. It is most nearly 

 related to F«<sws martinez Gabb (Geological Survey California, Paleontology, 

 vol. 1, p. 83, PI. 18, fig. 3), but will be readily distinguished by the absence 

 of the revolving lines of that species. Mr. Meek compares it with VoJuta 

 monodonta Binkoi'st, a European species, and with Voluta rigida Bail}', as 

 identified from India under the name Fasciolaria rigida by Stoliczka ; but 



