ME. ST. GrEOEGrE MIYAET ON THE SKELETON OE THE PEIMATES. 
331 
portion is greatest in Tarsius, and the Lemuridee other than the Indrisinee. It is least 
in the Gorilla and Man. 
The breadth of the ilium (as measured by a straight line drawn between its anterior 
— in Man superior — spinous processes), compared with the length of the spinal column, 
is greatest in the Gorilla, where it is more than three-tenths of the length of the latter. In 
the Orang and Man it is a little more than a fifth, and a trifle less in the Chimpanzee. In 
Hylobates it is about three-twentieths, and in the rest of the order it is between that and 
one-twentieth, except in Lemur and some of the Nycticebinse, in which it is rather less. 
The proportion borne by a line following the curve of the crest of the ilium to a 
straight one joining its anterior (in Man superior) spinous processes is greatest in Man, 
Hylobates, the higher Cebidse, and the Chimpanzee and Gorilla. It is least in Galago, 
the Nycticebinse, and Tarsius. 
The length of a line extending from the ilio-pectineal eminence to the nearest point 
of the tuberosity of the ischium, as compared with that of the spinal column, does not 
vary much. It is greatest in the Gorilla, viz. as 21 '8 to 100 ; then in the Chimpanzee, 
17-7 ; in Man and Simia, 16 ; the rest vary between this and the proportion one-tenth, 
except Chrysothrix and the Nycticebinse, where it is less. 
The antero-posterior (in Man vertical) diameter of the acetabulum, as compared with 
the length of the spinal column, is greatest in the Orang, where it is as 8 to 100, then 
in Man and the Gorilla. It is smallest (under 3 '5 to 100) in Arctocebus, Chrysothrix, 
and Hapale. 
When the same dimension of the acetabulum is compared with the length of the os 
innominatum, the proportion appears to be greatest in Man, then in the Orang, and 
least in Hapale and some of the lower Simiidse. 
The length of the symphysis pubis, compared with that of the spine, appears subject 
to great variation in the same species; but it is greatest in the Simiidse *, where it 
sometimes exceeds one-tenth; in the rest it ranges between this and one-twentieth, 
except in Man, Galago, Nycticebus, and Lemur, where it is a little less, and least of 
all in Arctocebus, Loris, and Perodicticus, where it is sometimes only as 1*7 to 100. 
The length of the os innominatum, as compared with the greatest transverse diameter 
of the pelvis, is greatest in Loris, viz. as 442-4 to 100, then in the Pitheciinge, 340-2 
to 100 ; the rest vary between this and 211, except in Man, in whom, at least sometimes, 
it is a little under 2 to 1. 
The breadth of the brim of the true pelvis, as compared with its conjugate diameter, is 
greatest in Man, where alone the former is in excess j’, viz. as 105-5 to 100. Some- 
* Professor Huxley remarks of Hylobates, “ The subpubic arch, distinct in all the other great Apes, has 
almost disappeared, the symphysis pubis being inordinately long” (Med. Times, 1864, vol. i. p. 618). And 
of the lowest Simiidoe he says, “ The symphysis is exceedingly long, the subpubic arch being very much 
reduced ” (Joe. cit. p. 672). 
t Not always so, however, Professor Huxley has observed. See ‘Medical Times,’ 1864, vol. i. p. 344. See 
also Mr. Jonx Wood’s article on the Pelvis in Todd’s ‘ Cyclopaedia,’ vol. v. pp. 150 & 151, 
MDCCCLXYII. 2 Z 
