236 TRANSACTIONS OF THE [mMay. 13, 
tions and combinations of the four type heads of origin and 
their insertion. 
I. Gleno-radial alone. 
A typical instance is presented by Talpa europea. Geohe- 
gan * describes the muscle in this animal as follows: The Bi- 
ceps is single-headed, arising just above the glenoid articular 
surface by a long tendon which passes through a groove in the 
extreme anterior end of the humerus; this groove is at first a 
tunnel]. It is only after it has passed the elbow that the muscle 
becomes fleshy. Insertion below the middle of the radius. 
Welcker + corrects this statement to read that the insertion is 
above the middle of the radius. 
Other forms presenting the Glenro-radial muscle are: Nycti- 
pithecus, Stenops, Horse, Ruminants,{ Lutra vulgaris.§ 
Il. Coraco-radial alone. 
This form of the Biceps muscle is presented by Orycteropus 
capensis, Rhinoceros, Frog, Toad, Lacerta, || Phoca vitulina.{] 
In this animal the muscle arises from the coracoid process, 
is inserted into the radial tuberosity, and is combined with a 
short head, which is connected with the Brachialis anticus. 
Ill. Gleno-ulnar alone. 
The muscle occurs in this form in Hyrax capensis and in Ro- 
dents generally.** 
IV. Coraco-ulnar alone. 
Humphry,+} in describing the muscular system of Crypto- 
branchus japonicus gives the following account of the Coraco- 
brachialis longus. 
“This is the largest muscle arising from the coracoid. It 
arises from the hinder edge of the coracoid and divides into two 
portions. Of these the larger and inner or lower division is in- 
serted into the ulnar edge of the humerus for a quarter of an 
inch above the internal condyle; the other division, being nearly 
_*Geohegan, Myology of the Fore-limb of Talpa europea, Proceedings Dublin 
Biolog. Assoc., Vol. I., 1875, p. 5. 
+ Welcker, H., Archiy f. Anatomie und Entwicklungsgeschichte, 1878, p. 23. 
t Krause, op. cit., p. 223. 
2 Lucae, J. C. G., Die Robbe und Otter (Phoca vitulina und Lutra vulgaris) in ihrem 
Knochen und Muskelskelet, Frankfurt @/ y,, 1873, p. 204. 
|| Krause, op cit., p. 223. 
{ Lueae, op. cit., p. 199. 
** Krause, op. cit., p. 223. W. Krause, Anatomie des Kaninchens, p. 107. 
tf Op. cit., p. 33. 
