160 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



bones; and an odorous gland occupies the top of the rump. Verte- 

 bne : C 7, D 14, L 5, S 4, C 7. 



Professor Cope "■ refers the known species of Tayassu " to three 

 subdivisions, which may be at some future time regarded as genera." 

 He places the Brazilian Sus tajacu Linnaeus in IVotophorus Gray, 

 and the Texan Dicotyles angulatus Cope in Dicotyles Cuvier. On 

 the following page he describes what he considers to be intermediate 

 between T ay assu 'tajacu and T. angiilatum, from Costa Rica, and in 

 conclusion observes : " It appears, then, that the latter [Tayassu 

 angulatum] must be regarded as a subspecies [of Tayassu tajacu'] 

 rather than a species." His subdivisions would, in such a case, have 

 only the value of subspecies instead of genera. On page 134, in his 

 amendment to the definitions he had previously given of the sub- 

 family Dicotylinai, of the family Hippopotamidm, and of the two 

 included genera, Dicotyles and Platygonus, he says : " That of the 

 subfamily ' Digits three ' should be supplemented by the words ' on 

 the anterior foot, and four on the posterior.' " Inadvertently the 

 extra digit was placed on the wrong foot, the digital formula being 

 4-3 instead of 3^. 



Subgenus TAYASSU Fischer (1814). 



Tayassu, Meeriam, Proc. Biol. Soc. Wash., XIV, p. 122, July 19, 1901. Re- 

 stricted to the tajacu-angulatns group." 



Notophorus Gray, Proc. Zool. Soc, 1868, p. 4.3. Type and only species, Sus 

 tajacu Linn»us. Preoccupied by Notophorus Fischer, 18n=Tayassu 

 Fischer, 1814. 



Tagassu, T. S. Palmeb, North American Fauna, No. 23, 1904, p. 955. 



Characters. — Smaller than Olidosus^ with the skull less massive. 

 Sides of rostrum excavated over premolars, and divided into upper 

 and lower parts by continuation of the zygomatic ridge (fig. 4a) ; 

 palate narrowed between canines and molars, with a sharp ridge run- 

 ning from first premolar to inner side of canine. Teeth smaller and 

 relatively narrow anteriorly ; second lower molar very much smaller, 

 with anterior cusp high and slender, the posterior cusp nearly obso- 

 lete. (Fig. 6a.) 



TAYASSU ANGULATUM (Cope). 

 TEXAS PECCARY. 



Dicotyles angulatus Cope, American Naturalist, XXIII, No. 266, Feb- 

 ruary, 1889, pp. 146, 147 (original description) ; JIareh, 1889, pp 

 134, 135. 



Dicotyles tajacu, Elliot, Field Col. JIus. Zool. Ser., II, 1001, p. 33, pi. 

 XI (Synop. Mam. N. Am.). 



"American Naturalist, XXIII, 1889, p. 134. 



"Subgenus OUdosus Merriam, Proc. Biol. Soc, Wash., XIV, July 19, 1902. 

 For "the nlhirostris group" { = nicotyles Gray, Proc Zool. Soc, 1868, p. 4.5^ 

 Type, D. laUatus Cuvier, Preoccupied by Dicotyles Cuvier, lSn=Tayassu 

 Fischer, 1814). 



