318 PROCEEDINGS OP THE ACADEMY OF 



D'Orbigny's figures (on pi. 23) in being more compressed near the dorsum, and 

 in having only about half as many nodes around its dorsal and ventral 

 margins. It also differs in having scarcely any traces of costas near the dorso- 

 lateral nodes (where they arc strongest on D'Orbigny's figure just cited) while 

 they are strongest near the middle of its sides. 

 Locality. Komooks, eastern shore Vancouver Island. 



Nautilus Campbelli. Shell large, subglobose, or somewhat oval in form, 

 moderately convex ; dorsum and sides rounded, or very slightly compressed ; 

 volutions increasing rather gradually in size, deeply embracing within, and 

 rounding into the umbilicus on each side ; umbilicus very small, but not quite 

 closed ; septa separated by spaces less than one third the transverse diameter of 

 the whorls at the point of measurement, and arching slightly backwards on the 

 sides and dorsum ; aperture nearly circular, but deeply sinuous on the ventral 

 side for the reception of the inner whorls. (Siphuncle and surface markings 

 unknown). 



Length or greatest diameter, 4-83 inches ; breadth or transverse diameter at 

 the aperture, 3-07 inches. 



This species is more nearly like N. Clemenlinus of D'Orbigny, (Pal. Fr. Ter. 

 Cret. tome 1, pi. 13 bis) than any other with which I am acquainted. It 

 differs, however, in having a more rounded aperture, and a more broadly 

 rounded dorsum, the entire shell being less compressed. 



It may be at once distinguished from Nautilus Dekayi of Morton, which 

 probably also occurs in the Cretaceous beds of Vancouver's Island, by its much 

 more compressed form, and consequently narrower aperture, as well as by its 

 slightly open umbilicus, that of N. Dekayi being entirely closed at all ages. 

 Its whorls are likewise more compressed on the sides, and more concave in the 

 region of the umbilicus. 



The specific name of this fine Nautilus is given in honor of Mr. Archibald 

 Campbell, the commissioner in charge of the North-West Boundary Survey. 

 Locality, same as last. 



Description of New Species of Cretaceous Fossils from New Jersey, Alabama 



and Mississippi. 



BY W. M. GABB. 



The following species are described from specimens, either in the collection 

 of ihe]Academy of Natural Sciences, or in my own. The types are mostly in 

 the shape of casts, but are all undoubtedly distinct. It is an unfortunate cir- 

 cumstance, that, except in the Ripley Group, this formation, east of the Missis- 

 sippi, rarely yields the shells of the species. In fact, the study of cretaceous 

 fossils, in this region, is to a great extent, a study of internal casts. The 

 Pectens, Oysters, Belemnites, and some other genera, are usually exceptions 

 to this rule ; though, sometimes, we find striking instances in which the shells 

 of other genera are beautifully preserved. The following descriptions are pre- 

 liminary. Fuller descriptions and illustrations will be published hereafter. 



Action Montf. 



A. cretacea. Subglobose. spire elevated, whorls five, convex (in casts) 

 and sloping on the sides, obliquely truncated above. Body whorl sub-com- 

 pressed, most convex above, width about equal to the length of the mouth. 

 Mouth narrowed above, wide below, rounded anteriorly. Two folds on the 

 columella ; the upper one heavy and rounded, lower or anterior one, obsolete. 

 The columellar edge of the body whorl in one of the casts is marked by acute- 

 angular striae, one branch extending directly upwards on the outside of the 

 whorls (inside of the shell), and soon becoming obsolete ; the other branch runs 

 into the columellar cavity. 



[Oct, 



