FROM THE PHOSPHATE BEDS OF SOUTH CAROLINA. 221 



of the ridge is the more prominent and thick, and is convex and smooth. Its 

 anterior part is as it were cut away on each side, leaving a narrower median 

 extension forward. At the back part of the rostrum the intermaxillary ridge 

 verges on a wide shallow notch, communicating posteriorly and beneath Avith a 

 deep fossa. The latter appears to be an unoccupied portion of the usual supra- 

 vomerine canal. It widens in a triangular manner below to the broken floor of 

 the vomer, and on each side is bounded by a broken ridge which appears to be the 

 downward extension of the intermaxillary. Four pits, apparently the commence- 

 ment of vascular canals, are directed forward from the fossa into the rostrum. 

 Two of the pits form a pair below, the others are placed in the median line above 



the former. 



On each side of the upper back part of the rostrum there is a foramen com- 

 municating with a vasculo-neural canal directed downward and forward within the 

 intermaxillary bone. The two foramina are an inch and three-eighths apart. 



The right lateral margin of the rostrum is acute. The left margin is obtuse 

 and subsides forward. Above the margins a foramen opens from a canal directed 

 forward in a groove. The foramen on the right is an inch and three-eighths 

 behind that of the left side. 



The inferior surface of the rostrum presents three pairs of concave facets sepa- 

 rated by a median carina which is produced into a central prominence. The pairs 

 of facets successively decrease and become more shallow from behind forward. 

 The posterior largest pair appear to be the palatine articular surfaces. Vascular 

 foramina and grooves leading from them are seen in various positions of the under 

 surface of the rostrum. 



At the posterior broken border of the specimen a large foramen is observed 

 communicating with a canal directed inward and forward within the maxillary 



bone. 



The estimated length of the beak in its entire state from the nasal notch is 

 eit'ht and a half inches. The depth or thickness at the notch back of the inter- 

 maxillary ridge is an inch and seven-eighths. The distance between the most 

 prominent portion of the intermaxillary ridge and the central eminence of the 

 palatine carina is two and a half inches. 



PROROZIPHIUS. 



Proroziphius macrops. 

 Leidy: Proceedings Academy Natural Sciences, Philadelphia, 1876, 87. 



Since writing the preceding account, and presenting at a meeting of the Acad- 

 emy a notice of the remains referred to four species of Ziphioid Cetaceans, I have 



