OCR Text |
Show 290 MR. F. E. BEDDARD ON THE [Feb. 16, for some of its fibres, instead of ending in the patagial tendons, are inserted on to the deltoid crest. The patagialis brevis tendon (fig. 2) is somewhat wide and diffuse ; it gives off a wristward slip near to its insertion on the forearm, from which arises a patagial fan joining the tensor longus tendon. The Biceps slip has already been referred to; it joins the tensor longus tendon. Fig. 2. Muscles and tendons of Patagian of Phaethon. Bi. slip, Biceps slip. The Anconceus, as in other Steganopodes, has besides its scapular origin a tendinous connection with the scapula and with the humerus. I could not find an Expansor secundariorum. The Latissimus dorsi anterior is less than half the size of the posterior. The most posterior portion of thelatter arises as a special slip below (covered by) the sartorius. The tendon of insertion of the posterior division is, as usual, inserted on to the humerus in common with the humeral attachment of Anconasus. There appears to be no Lat. dorsi metapataglalls. The two Rhomboidel are about equisized. The profundus springs aponeurotically. The Serratus superficlalls is as usual made up of an anterior and posterior portion. The anterior portion is composed of two slips arising respectively from the last cervical and the first dorsal rib ; its tendon of insertion is connected with the subscapular^ externus. The posterior division arises tendinously from dorsal ribs 2, 3, and 4. The Serratus profundus arises from the last cervical and the first two dorsal ribs; the several slips decrease in size from before backwards. The Serratus metapatagialis is a large muscle arising from the four ribs in front of the last. |