SECTION III. 



GASTEROPODA OF THE MIOCENE DEPOSITS OF NEW JERSEY. 



Class GASTEROPODA. 



Order PECTINIBRANCHIATA 



Family MURICID^]. 



Genus MUREX Linnaeus. 



Murex Shilohensis. 



Plate xvn, fig. 1. 



Murex Shilohensis Heilprin : Proc. Acad. Nat. Sci. Phila., 1887, p. 404. 

 f Murex sp.f Heilprin : List, Proc. Acad. Nat. Sci., loc. cit. 



" Whorls about seven, angular, flattened on the shoulder, which is crossed 

 diagonally by the variceal ridges ; varices about eight on the body- whorl, 

 subequal, spinosely elevated on the shoulder angulation, and crossed by 

 four subequal revolving ridges, which appear double on the crests of the 

 varices; only two such ridges on the whorls above the body- whorl. 



" Aperture somewhat more than half the length of the shell, key-hole 

 shaped, with the canal broadly reflected. Length nearly .75 inch." 



The type specimen of this species has the spines on the angle of the 

 volution so strongly marked and tube-like as to give the shell very much 

 the character of the genus Typhis, still they do not appear to be quite in 

 the nature of tubes, but seem to be deflected backwards, aild open more 

 decidedly on the anterior side than behind ; enough so at least to induce 

 one to place it rather with Murex than in Typhis. As only a single indi- 

 vidual has been observed, it is somewhat difficult to say how far it may have 

 varied in this particular. 



Locality: The specimen is from Mr. Ayers' pits in the Miocene marls, 

 near Shiloh, N. J., and belongs to Miss Emma Walter, of Philadelphia, 

 from whom it was borrowed through Prof. Heilprin. 



97 



mon xxiv 7 



