DESCRIPTION OF AN APPARENTLY NEW TOOTHED 

 CETACEAN FROM SOUTH CAROLINA 



By remington KELLOGG 



bureau of biological survey, u. s. department of agriculture 



(With Two Plates) 



Mr. Earle Sloan of Charleston, South Carolina, has given me per- 

 mission to study the skull of a fossil dolphin from that state. An 

 account of a geological section ' near where this specimen was obtained 

 was published in 1908. The fossil may be described as follows : 



XENOROPHUS, new genus 



Type. — Xenorophus sloanii, new species. 



Diagnosis. — Resembling Agorophiiis and Archaeo del phis in the 

 presence of an intertemporal constriction. Differing from these 

 genera (so far as their characters are known) in the following pecu- 

 liarities : premaxilla widened posteriorly so that it extends conspicu- 

 ously outward under the maxillary in the interorbital region ; lachry- 

 mal very large, sheathing most of the upper margin of the orbit ; 

 maxillary abruptly sloping in region immediately in front of orbits, 

 its anterior and posterior portions horizontal ; palatine extending 

 forward as far as the anterior margin of the alveolus for the last 

 molar. Teeth with finely serrated cutting edges and rugose enamel. 

 Seven are double-rooted. In front of these the remaining portion of 

 the rostrum bears the alveoli of two single-rooted teeth. 



XENOROPHUS SLOANII, new species 



Type. — Cat. No. S. 402 W., Sloan Collection (now on deposit in 

 Section of Vertebrate Paleontology, United States National Mu- 

 seum). Incomplete skull, including the interorbital region and the 

 major portion of the rostrum. Six molars are in place and an addi- 

 tional one was found imbedded in the matrix above palate. 



* Sloan, E., Catalogue of the mineral localities of South Carolina. Bull. No. 

 2, ser. 4, South Carolina Geol. Surv., Columbia, p. 286, No. 402, 1908. 



Smithsonian Miscellaneous Collections, Vol. 76, No. 7 



