404: R. S. LuU—Neiu Camels. 



that it is distinct from the paratypes of the cameloides 

 description, especially the upper dentition (No. 7915, 

 A. M. N. H.). It seems fitting, therefore, to name it in 

 honor of Doctor Jacob L. Wortman, the describer of 

 P. cameloides, who for a time rendered so eminent a 

 service to the science of vertebrate paleontology. 



Peterson,^ speaking of Oxydactylus, says this phylum 

 appears to be divergent from that of the true camels and 

 that we are at present able to trace it with some certainty 

 to the genus Protomeryx of the Upper Oligocene. Mat- 

 thew,* however, restricts the use of the term Protomeryx 

 to the two species P. lialli Leidy and P. campester Mat- 

 thew, and uses the new subgeneric term Paratylopus to 

 include what were originally described as Gomphother- 

 ium st ember gi (Cope) and G. cameloides Wortman, 

 together with his new species primcevus, which he makes 

 the type of Paratylopus. His derivation of Oxydactylus 

 is from Paratylopus through Miolahis, the restricted 

 Protomeryx being in the direct line of camel evolution 

 and leading to Protolahis and Procamelus. As Peterson 

 considers Protomeryx to be a sjmonym for Gomphoides 

 (preoccupied), it is probable that he and Matthew are 

 referring to the same group under different names, and 

 hence their statements agree. The Yale material thus 

 briefly described certainly bears this out, as it differs from 

 the later Oxydactylus mainly in its greater primitiveness. 



' O. A. Peterson, Ann. Carnegie Mus., 2, 472, 1904, 



* W. D. Matthew, Bull. Amer. Mus. Nat. Hist., vol. 20, 211-215, 1904.. 



