42 CRETACEOUS GROUP 



given different names to the same species ; but as his has 

 priority, I of course abandon mine. 



2. S. reniformis, (S. G. M.) pi. ii. hg. 6. 



Specific character. Ventricose in the middle, tapering ra- 

 pidly towards each end ; with numerous costee that bifurcate 

 laterally. 



Less than inch in length. 



A solitary and imperfect cast was found by Mr. Conrad 

 in the friable marl at Grove mill, near Borden town, N.J. 



Allied to S. striatus of the British chalk. 



Baculites. Faujas. 



1. B. ovatus, (Say,) pi. i. fig. 6, 7, 8. 



Journ. Acad. Nat. Sciences, vol. vi. pi. v. fig. 5, 6. Amer. 

 Journ. of Science, vol. xviii. pi. i. fig. 6, 7, 8. 



Sjiecific character. Transversely suboval, with semi-ellip- 

 tical lateral undulations ; septa six-lobed> and a smaller one be- 

 hind; lobes of the superior faces of the septa three on each 

 side, w T ith a minute one between each, dentated at their edges: 

 anterior lobe, (nearest the siphunculus,) small, not sinuous ; 

 second lobe with a single projection at each side, and sinus at 

 the tip; third lobe dilated, with a small sinus at each side, and 

 a more profuse and profound one at tip ; posterior lobe scarcely 

 larger than the lateral intermediate ones. 



The above description is derived from Mr. Say, ex- 

 cepting the undulatory sides, which is obvious in all the 

 more perfect specimens I have seen, as in iig. vi. of pi. i. 

 In other instances, (PL i. fig. viii.) these undulations are 

 scarcely perceptible, owing probably to attrition. Such 

 is the case with the original specimen described by Miv 



