126 BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



tal line, the palatal separated from the posterior by a prominet flauge. 

 The first premolar is less than half the size of the second. It is in the 

 dental line, but, owing to its minuteness, it appears to be depressed 

 when seen in profile. Molars with well-defined cingula; first and sec- 

 ond molars as in J.. /«sc^^5, except that no trace of heel is seen. The 

 third molar with outer surface more deeply fluted thaniu A.fuscus and 

 the rudiment of the second V-shaped figure is longer. 



Mandibular teeth. — None of the teeth crowded. This remark is es- 

 pecially applicable to the incisors and premolars. Incisors arranged 

 in a V-shape row, flat, trifld, first and second touching, but the third 

 separate li-om the second and the canine. Canine not curved back- 

 ward, presenting nowhere a concave surface. Very prominent flange 

 between the posterior and lingual surfaces. Cingulum prominent, 

 forming two cingules, one anterior — tlie larger — and one posterior 

 (talon?). First premolar small, with entire robust cingnlum scarcely 

 touching canine. Molars C[uite as in VespertiUo and allies. Aery high 

 cusx) points and pointed apex, which is subequal with V, 



Variations. — In sj)ecimen the upper central incisor was bicuspid. 



*%»?/.— Tlie mesencephalon is 2"""; the length of skull, 13'"'"; the 

 greatest width, 7"'"'; the least width, 3'""'. The posterior temporal 

 crests are apparently absent. The sagittal is faintly expressed ; it is 

 not visible beycnul the middle of the vertex. The anterior temporal 

 impressions are defined. The nasal eminence is absent. The entire 

 region depressed with a linear ridge on either side. The fronto-maxil- 

 lary inflation is conspicuous above the orbit, forming a bold obli<j[ue 

 ridge, which is considerably raised above the level of the imsal bones. 

 Both lachrymal and infraorbital foramina conspicuous. A line from 

 the upper border of the anterior nasal aperaturo falls directly back of 

 the canine. The paroccipital process is small rounded, and not pro- 

 duced below the level of the paroccipital. The intermediate si)ace is 

 incised below. The lingual tongue reaches the tympanic bone; the 

 tympanic bone is incomplete above. The pterygrid process is fur- 

 nished with a rather long style. The masseteric impression reaches 

 the lower border of the horizontal ramus. The angle produced beyond 

 the condyle and deflected ontward so as to intersect the outer edge of 

 the condyle. In a specimen from Carlisle, Pa., having unicuspid max- 

 illary incisor the temporal crest is absent, and the two sagittal tem- 

 poral impressions do not meet, at the same time that the post-temporal 

 crests are more marked than in most specimens. The mandebe is dis- 

 posed to be entire, i. e., the halves do not fall apart as readily as in 

 other species. 



Notes on the Skeleton. — Coracoid process of scapula, broader at base 

 than at the free end, Avliich is furnished with two coequal processes. 

 Glenoid region with large concavity on the outer surface. Humerus 

 so similar to that of V. vesperiis that with the exception of size (it is 

 2imm loug) the two might be of the same species. Proximal rudiment 



