Anatomy of the Alligator. 283 
versity, which I have compared with my own results. I feel 
indebted to him for having corrected an error in my former 
paper on the Crocodile, in which I confounded the gluteus 
minimus with the tensor femoris vagine muscle: this error 
has been avoided in the present paper; but I have adhered 
steadily to the other supposed errors pointed out by Mr. Hair, 
as he has failed to satisfy me that | am mistaken in my view 
of the true relations and names of the pelvic bones of the 
Alligator or Crocodile. 
In Pl. X. fig. 1 is represented the pelvic arch of the Alli- 
gator (left side), in which the parts, as named by me, are— 
BRS Sere ci) < ons eae Tsch. 
PAN kk sibinwte s 4 Singhs eins Ii. 
Mamaplale. 3.659% ¢esw wk ies m. 
rrp D. 
These bones are named by other anatomists as follows :— 
Mee or It, vas oe oe eee ilium, 
wets s gk Sl's oy at alate ae ischium. 
LE rarriry so. pubes. 
The weight of evidence is altogether in favour of the names 
given by me, so far at least as the muscles are concerned, as 
will appear to any comparative anatomist from the following 
description, by which it appears that the usual origins are left 
to all the muscles, and that no diffieulty occurs with respect to 
any muscle, except those named by me marsupiales (Nos. 44, 
45), which would be called obturators by those who take a 
different view of the pelvic bones. On the other hand, however, 
such anatomists would be required to explain why the ham- 
string muscles should take origin from the ilium and not from 
the tuber ischii, and why the pectineus should arise from the 
anterior border of the ischium rather than from its classical 
bi 2 on the pectineal line of the pubes. 
uch questions, however, relate to transcendental anatomy, 
with which at present we have no concern; and I hope the 
description here given of the muscles, with their weights, 
origins, and insertions, will be sufficient to enable any other 
anatomist to recognize them readily. 
I. Muscles of the Hind Limb. 
1. Sartorius. 0°34 oz. av. . O. from the anterior spine of 
the ilium. I. into the fascia of the inner side of the thigh, 
halfway down. 
21* 
