272 CUIKOPTERA 



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 extei-nally than 

 internally ; large upper premolar with crown area about equal 

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

 anterioi' and postei'ior borders very slightly concave, the antei'O- 

 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 S(iuarish, with antero-external angle tending 

 to become I'ounded off", jiarticulai'ly in the posteiior tooth ; cusp of 

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

 than tii'st, 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 iniier edge of tooth, the anterior border nearly 

 straight ; protocone low but rather broad ; hypocone clearly 

 indicated but not distinct from posterior commissure of jirotocone ; 

 pai'acone and metacone nearer outer edge of crown tlian 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 anterioi- border, its three cusps and three 

 commissures normally developed. Lower molars with no special 

 peculiarities, the second triangle oi vi.^ 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 ; 

 til)ia, 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 bod}^ 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 9:! ; 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. 



