272 



CHIKOPTEEA 



essentially as in large premolar except that the antero-internal 

 basal cusp is barely indicated, the cutting edges of the main cusp 

 are less developed, and the crown is narrower externally than 

 internally ; large upper premolar with crown area about equal 

 to that of first molar and double that of small premolar, its 

 anterior and posterior borders very slightly concave, the antero- 

 internal basal cusp small but evident, the main cusp with well 

 developed anterior and posterior cutting edges, and antero-internal 

 and postero-external longitudinal groove ; lower premolars 

 essentially alike in form, the crown area of the posterior tooth 

 about equal to that of canine, that of the two others successively a 

 little less, the outline squarish, with antero-external angle tending 

 to become rounded off, particularly in the posterior tooth ; cusp of 

 first about half as high as canine, that of second slightly higher 

 than first, that of third nearly as high as main cusps of molars ; 

 cingulum well developed, forming in each tooth a small but 

 evident antero-internal basal cusp. First and second upper 

 molars with posterior border deeply and almost angularly 

 emarginate near inner edge of tooth, the anterior border nearly 

 straight ; protocone low but rather broad ; hypocone clearly 

 indicated but not distinct from posterior commissure of protocone ; 

 paracone and metacone nearer outer edge of crown than usual, 

 leaving a wide, pit-like median concavity, metacone slightly the 

 higher of the two cusps ; styles and commissures well developed, 

 Wpattern normal ; third upper molar with crown area about 

 half that of first, its width through metacone slightly less than 

 half length of anterior border, its three cusps and three 

 commissures normally developed. Lower molars with no special 

 peculiarities, the second triangle of m 3 narrower than first, but 

 of about the same area. 



Measurements. — Adult male and female from Neuchatel, 

 Switzerland : head and body, 59 and 59 ; tail, 58 and 60 

 tibia, 20 and 19; foot, 10 and 9 '4; forearm, 45 and 44 • 6 

 thumb, 7 and 7 ; third finger, 92 and 92 ; fifth finger, 53 and 54 

 ear from meatus, 12 '6 and 12 ; width of ear, 12 and 12. Adult 

 male and female from Corinth, Greece : head and body, 57 and 

 56; tail, 57 and 55; tibia, 18 ■ 6 'and 19; foot, 10 and 9 6; 

 forearm, 44 and 45 ; thumb, 6 ■ 6 and 7 • 2 ; third finger, 92 and 

 90 ; fifth finger, 54 and 53 ; ear from meatus, 12 and 12 ; width 

 of ear, 12 and 12. Two adult males from Silos, Burgos, Spain 

 head and body, 60 and 60 ; tail, 60 and 57 ; tibia, 19 and 19 -4 

 foot, 11 and 9- 6 ; forearm, 44 and 44 ; thumb, 7 '4 and 7 -4 

 third finger, 93 and 89 ; fifth finger, 55 and 56 ; ear from meatus, 

 11-4 and 11-6; width of ear, 13-4 and 12-6. Two adult 

 females from the same locality : head and body, 59 and 59 ; tail, 

 60 and 59 ; tibia, 19 ■ 6 and 20; foot, 9'8 and 10; forearm, 

 45-4 and 46 ; thumb, 8 and 7-4 ; third finger, 93 and 93; fifth 

 finger, 55 and 55 ; ear from meatus, 12 and 11 • 6 ; width of ear, 

 12 '6 and 12 • 6. For cranial measurements see Table, p. 274. 



