190 Goldman — A New Peccary from Costa Rica. 



forming supraorbital spots in some specimens; feet usually white or 

 yellowish white, but varying to nearly pure black. 



Skull. — In general outline resembling that of T. a. ringens, hut zygo- 

 mata more widely spreading; nasals broader, more abruptly tapering 

 anteriorly, the free ends usually shorter; maxillae considerably swollen 

 laterally above the alveoli of premolars as in T. a. rin'gens ; molars 

 broader; lower molariform toothrows broader posteriorly, narrower an- 

 teriorly; first lower premolars decidedly smaller with less prominent 

 anterior cusps. Contrasted with the skull of T. a. albirustris the follow- 

 ing differences are shown: Braincase more highly arched along median 

 line of frontal region; maxillae more swollen outward above the alveoli 

 of first premolars; palate narrower behind last molars; interpterygoid 

 fossa narrower; mandibular toothrows more evenly tapering; second and 

 third lower premolars much smaller and narrower anteriorly. 



Measurements. — No skin measurements available. Skull (type): Great- 

 est length, 280.5 mm.; condylobasal length, 245; zygomatic breadth, 

 120; interorbital breadth, 05; breadth across postorbital processes, 90; 

 length of palate, 17.8.7; maxillary tooth row. 70.7; mandibular toothrow, 

 82.8; alveolar length of second lower molar, 15.5; anterior breadth of 

 second lower molar, 11.9; posterior breadth of second lower molar, 14.7; 

 length of first lower premolar, 7.9; anterior breadth of first lower pre- 

 molar, 3.7; length of second lower premolar, 9.1; anterior breadth of 

 second lower premolar, 4.(1. 



Remarks. — The Costa Rican white-lipped peccary seems rather more 

 closely allied to T. a. ringens of southern Mexico than to T. a. albiroslris 

 as represented by three Brazilian skulls, but in combination of cranial 

 and dental characters it differs notably from both. From T. a. ringens 

 it is distinguished by broad molars and very small lower premolars. In 

 the breadth of the molars it is similar to T. a. alhirostris, but the indi- 

 vidual teeth are narrowed anteriorly, instead of quadrate, resulting, 

 especially in the lower jaw, in a more evenly tapering toothrow. This 

 condition is especially noticeable in the second and third lower premolars 

 when contrasted with those of T. a. alhirostris which are very broad and 

 massive across the anterior crowns. 



The molar crowns in T. a. spiradens show signs of wear early in life, 

 the cusps in the first and second molars becoming flattened on the tops 

 before the third molar is fully in place, while in T. a. ringens they remain 

 unworn for a considerably longer period. This difference in wear may 

 be due to the more abrasive character of the food taken by the Costa 

 Rican animal. 



Specimens examined. — Total number, 17, all from Costa Rica as follows: 

 Talamanca (type locality), 14; exact locality unknown, 3. 



