274 Description of two additional Crania of the 
developed ; yet not to an old one, as appears from the cir- 
cumstances, that the points of the molars are but very slightly 
worn, and the crests on the top of the head and occiput, are 
but imperfectly formed. Its size, as well as that of all the 
other crania of this species which have been measured, when ; 
compared with that of T. niger (Chimpanzée), and a well- 
marked Negro head, may be learned from an inspection of R 
the following table. 
Tasre I.—Measwrements of the Orania of T. gorilla, of T. Niger, and i 
of the Cranium of a native African, in inches and tenths. Nos. 
2, 6, 7, and 8, are in inches and lines. ; 
* Troglodytes gorilla. T. niger. 
Males. Females. |Male./Female. 
: 
Man, : 
f 
id 
Lee) Ou 00 fev. | ¥.- | V1) Mae Pee 
Length of head from oc- 
ciput to edge of incisive 
alveolus 
11:2} 11°4 |11:0 |10°2| 9°10) 9-0} 8-0} 7:9 | 9-6 
Greatest breadth across 
post-auditory ridges 
Smallest diameter behind 
orbits . 
Diameter of Pree: across 
zygomatic arches 
Diameter of face oo 
6:1) 6:10) 64] 5:9) 5:2 | 56] 5:0) 4:6 | 5-4 
2:5) 3:3 | 2:9) 2°7/ 2:5 | 2-4] 26] 2:8 | 3-4 
6°5| 66 | 7:0] 6-4/5°5 | 5°3| 50) 4:8 |.5-7 
of the middle of the or- 49| 60 | 5:8] 57/43 | 48) 43] 4:0 | 4:9 
bits 
From occiput to most pro- 
minent part of supra-}| 7°3| ... | 7°6| 65/65 | 61| 5:4} 5:3 | 7-2 
orbitar ridge 
From supra-orbitar ridge 
to edge of incisive al- }| 4:8 D7) GO) ope) os. 4:0 |= aed SS 
veolus 
Breadth of zygomatic fossa M7} eB Oy ES Tea a5 eS ae een 
Inter-orbitar space SY Es OWS [0:24 Del L-Oh Usd) 0:8) enOie de? 
Transverse diameter mt 9/18! 1-6/141]216!/ 2:5] 16 | 16 
orbits . “ 5 
Vertical ‘ 1:6) 1:7 | 1-6} 2:6) 1:4 197 11-3) Paes aes 
Length of bony palate 
from outer edge of in| ST | PASE Ne, MASS 4 BSN cae Sa 17 
| cisive alveolus. 2 
From anterior edge of fo- 
ramen gun oe 7:2 7-4| 3-5 
edge of incisive alveolus 
Crania I. and V. were the ones brought by Dr Savage to this country ; 
IL, VI., Vil. and VIIL., are the crania described by Professor Owen ; III. and 
IV. are the crania which were obtained by Dr Perkins ; IX. the cranium of a 
Negro born in Africa, in whom the characteristics of the race were well 
marked, and which belongs to the Cabinet of the Boston Society for Medical 
Improvement. (See Catalogue of Society’s Cabinet, Specimen No. 61.) 
