204 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



LIST OF SPECIES OF SINOPA AND ALLIED GENERA. 



[The names unci dates are those of tlie original description. Indeterminate species are placed in 



brackets.] 



1862. Prorirerrn ti/piat Rutimeyer. Egerkingen beds, Switzerland. 

 June 21, 1871. {Triacodon faUax 'Slsiriih.] Bridger foi'mation, Wyoming. 

 July 11, 1871. Sinopd rapax Ijeidy . Bridger formation, Wyoming. 

 July 29, 1872. [Triacodon aculeatus Cope.'] Bridger formation, Wyoming. 

 Aug. 3,1872. Stjipoloph us pnngens Cope. Bridger formation, Wyoming. 

 Aug. 7, 1872. Limnocyon agilis Marsh. Bridger formation, Wyoming. 

 Aug. 7, 1872. StypoJophus hrevicalcaratus Coiie. Bridger formation, "Wyoming. 

 Aug. 7, 1872. \_Stiipoloplius insectivorus Cope.] Bridger formation, Wyoming. 

 Aug. 7,1872. [^Triacodon grandis Msxsh..] Bridger formation, Wyoming. 

 Aug. 7,1872. \^Trkwodon nanus M.arsh..'] Bridger formation, AVyoming. 



1873. Cynohyxnodon cayluxi Filhol. Phosphorites, France. 



1873. Cynohyxnodon minor Filhol. Phosphorites, France. 



1874. Prototomus liverrhms Cope. Wasatch formation. New INIexico. 



1875. Prototomus secundarius Cope. Wasatch formation. New IMexico. 

 1875. Prototomus midticuspis Cope. Wasatch formation, New IMexico. 

 1875. Prototomus strenuus Cope. Wasatch formation, New Mexico. 

 1877. Stypolophus Mans Cope. Wasatch formation, New Mexico. 

 1882. Stypolophus whitise Cope. Wind River formation, Wyoming. 

 1892. \_Proviverra aniericana Scott.] Bridger formation, AVyoming. 



1901. Sinopa opistJiotoma Matthew. Wasatch formation, Wyoming. 



1902. Sinopa major Wortman. Bridger formation, Wyoming. 

 1902. Sinopa yninor Wortman. Bridger formation; Wyoming. 



Sinopa grangeri infra. Bridger formation, \Vyoming. 



HISTORY AND NOMENCLATURE. 



Provivenri Rutimeyer, t3^pe P. typica, was the first genus described. 

 It was ])ased upon the anterior part of a skull in fairly good preserva- 

 tion. The additional material referred to this genus is very incom- 

 plete and its identification doubtful. 



Sinopa Leidy, type S. Tdpax^ was based upon an incomplete lower 

 jaw. The first mention of the genus includes about a half a page of 

 description and the type was figured two years later. This specimen 

 has since been mislaid, but Leidj^'s excellent figures enable us to 

 identify more complete specimens in the American Museum collec- 

 tions and differentiate the genus from Provwen^a. The skeleton 

 described in this article represents a new species of Sinopa. S. opis- 

 thotoma Matthew also belongs here but is subgenericallj' distinct. 



Triacodon Marsh, type T. fallax., described shortly before Sinopa, 

 was founded upon the trigonid of a lower molar which may belong to 

 Sinopa., Ui))tac(/on, Limnocyon, or some other creodont or carnivore. 

 It is quite indeterminate. Three other species have been referred to 

 the same genus and are equally indeterminate. 



Stypoloplntx Co'^a., tA'pe S. pimgent<, was based upon a part of the 

 lower jaw of a species closely allied to Sinopa rapa.r, of which the 

 genus is a synonym. ! 



J*/'ototo)/tut! Cope, type P. viverrinns., was ])ased upon a palate and 



