112 PALEONTOLOGY OP NEW JERSEY. 



This species, known from internal casts only, dififers from all the other 

 forms from New Jersey in its greater size; greater angle of the spire; short, 

 ventricose volutions, which are strongly rounded with deep sutures; and in 

 the proportionall}' short, compact body volution. There are very faint 

 indications of vertical folds on the upper volutions, but too indistinct to fig- 

 ure or count. Casts apparently identical with this occur in the Cretaceous 

 in Texas, but have not been described. 



Formation and locality: This species is found at MuUica Hill, New 

 Jersey, and a very imperfect cast appears to have come from Freehold, New 

 Jersey. Both are from the Lower Marls of the Cretaceous. Those from 

 MuUica Hill are from the highly feiTuginous beds below the true marls. 



Genus ANCHURA Conrad. 



Anchura arenaeia. 



Plate XIV, Fig. 10. 



Rosiellaria arenarum Morton: Syn. Org. Rem. Cret., p. 48, PL v, Fig. 8. 

 Rostellaria ? arenarum (Mort.) Meek: Check List Cret. and Jur. Foss., p. 20. 

 Rosiellaria arenarum (D' Orb.) Gabb: Proc. Acad. Nat. Sci., 1876, p. 298. 

 Gladius arenarum (Mort.) Gabb; Synopsis, pp. 54, 75. 



Anchura arenarum (Mort.) Meek: Geol. Surv. N". J., Newark, 1868, p. 729; 

 Gabb, Proc. Acad. Nat. Sci., Phila., 1876, p. 298. 



The only New Jersey example of this species which I have seen is the 

 type specimen. Among all the collections examined none have appeared 

 that will satisfactorily agree with it. The specimen is a very imperfect 

 cast, and shows but indifferently the features of the species. It has been 

 a rather strong and robust form of about 2 inches in length, with strongly 

 rounded volutions, probably foiir and a half or five in number, and rapidly 

 decreasing in size upward; sutures very strongly marked; aperture nai'- 

 row, but the lip is unknown and the rostrum apparently quite short; volu- 

 tions marked by ten or twelve vertical plications or folds which are strongly 

 marked on the largest part, but become obsolete at the sutures above and 

 below, while on the body whorl they are not visible below the upper two- 

 thirds, the lower tliird being destitute of markings; on outer half of the 

 last volution the folds indistuact or obsolete; the folds appear to have 



