1905. | ANATOMY OF THE FERRET-BADGER. 23 
The posterior cerebellar arteries are asymmetrical in their 
origin from the basilar, the left being considerably in front of the 
right. 
The middle cerebellar arteries arise in front of the sixth nerve. 
$ Some Notes on the Muscles. 
The muscular anatomy of the Carnivora has been lately treated 
of in an exhaustive fashion by Messrs. Windle and Parsons*, As 
a supplement to that paper (which does not deal with Helictis) I 
am able to offer a few notes upon the musculature of Helictis 
personata. 
The Sterno-mastoid consists from the very beginning of two 
parts: the larger of these is inserted on to the mastoid next and 
superficial to the cleido-mastoid muscle; the smaller part crosses 
the cleido-mastoid and joins the cephalo-humeral. This latter 
portion of the muscle has been spoken of as a portion of the 
trapezius, with which, indeed, it is plainly confluent above. 
The Sterno-hyoid and Sterno-thyroid appear to arise from the 
sternum as one muscle. I could find no tendinous intersection. 
The Omohyoidis apparently completely absent. I could find no 
trace of it. This muscle is usually present in Mustelide. 
The Omotrachelian has exactly the relations described by Windle 
and Parsons. 
The Rhomboideus profundus, which arises from the supra-spinous 
fossa of the scapula near to the root of the spine, is a slender muscle 
inserted on to the atlas deep of the omotracheal. It is perfectly 
distinct at its origin from the Rhomboideus cervicalis. Its 
discovery in Helictis gives further support to Messrs. Windle and 
Parson’s belief that the muscle is eminently characteristic of the 
Mustelidee. 
The Rhomboideus capitis has only asingle origin in common with 
the Rhomboideus cervicalis, not the double origin of Jctonya (a near 
ally of Helictis) as figured by Windle and Parsons. 
The Dorso-epitrochlear is contiguous to and hardly if at all 
distinguishable from the extra head of the Z’riceps occurring in 
this as in many other Carnivora. The Dorso-epitrochlear itself is 
of course part of the Latissimus dorsi; in passing by the scapula it 
receives a mass of fibres from the lower border of that bone and 
thence becomes continuous with a sheet of fibres arising from the 
Teres and constituting, as I imagine, the “extra head” of the Z'riceps 
of Messrs. Windle and Parsons, which those anatomists state to be 
characteristic of the Mustelide. 
The iceps has only one head. 
Helictis appears to possess two distinct Palmaris longus muscles. 
The Sartorius is Single and fused at its insertion with the also 
single Gracilis. 
The Pectineus, often a double muscle, is single in Helictis. 
* P. Z.S. 1897, p. 370, & 1898, p. 152. 
