22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8l 



anterior edge of posterior emargination, 5.6 (8.2) ; least width of 

 palate between toothrows, 1.2 (4.0) ; maxillary toothrow (alveoli) 22.0 

 (22.4) ; alveolar width of pin^, 5.8 (5.2) ; height of ni^ from grinding 

 surface to root, 15.0 (14.0). Mandible of an individual with teeth 

 in same stage of wear as those of type: distance in alveolar line from 

 posterior margin of m^ to anterior margin of incisor, 36.0 ; distance 

 from tip of incisor to posterior edge of grinding surface of m-i, 38.0 ; 

 diastema, lo.o; distance from tip of incisor to anterior margin of 

 crown of pmt, 15.8; depth from inner margin of alveolus of piih to 

 l)Osterior point of symphysis, 14.4; length of symphysis, 22.4; length 

 of toothrow, grinding surface, 22.2, alveoli, 24.0; alveolar width of 

 pMi, 5.8. Mandible of an individual with crown of m^ entirely worn 

 flat : distance in alveolar line from posterior margin of m-i to anterior 

 margin of incisor, 37 ± (46.6) ;^ diastema, ii± (18.8) ; depth from 

 inner margin of alveolus of ptih to posterior point of symphysis, 17 ± 

 ( 19.0) ; length of symphysis, 23 ± (23.0) ; length of toothrow, grind- 

 ing surface, 24.2 (22.0) ; alveoli, 25.0 (22.4) ; alveolar width of puii, 



54 (5-0). 



Specimens examined. — One palate, six mandibles and four isolated 

 cheekteeth. A mandible and two of the isolated teeth were found in 

 the caves near I'Atalaye, the rest of the material came from the large 

 and small caves near St. Michel. 



QUEMISIA gen. nov. 



Plate 4, figs. 2, 2a 



Type. — Queinisia gravis sp. nov. 



Characters. — Size and general features probably as in the Porto 

 Rican Elasmodontomys. Enamel pattern of mandibular cheekteeth 

 (pi. 4, fig. 2a) like that of Elasmodontomys (pi. 4, fig. la) but reentrant 

 folds less transverse to the axis of the toothrow, the axis of the folds 

 slanting forward at an angle of only 21° instead of about 50°. 

 Mandibular symphysis extending backward beyond level of middle 

 of mi instead of barely to middle of pm^ ; shaft of lower incisor not 

 extending behind symphysis, its base lying beneath anterior half of 

 Wi (in Elasmodontomys the shaft of the incisor extends far beyond 

 the symphysis to terminate beneath middle of W2) ; shaft of femur 

 more flattened than in Elasmodontomys. 



^Measurements in parenthesis are those of an adult Caproinys pilorides (No. 

 143150). 



