308 



DE. E. W. SHTJFELDT's MORPHOLOGICAL 



PI. XA^II. fig. 2 of the present memoir. This muscle arises from 

 the inner surface of the skin at the lower part of the neck, 

 its fibres convergiug as they pass towards the shoulder to 

 terminate in a small and delicate tendon, which accompanies the 

 tendon of the tensor patagii longus in the free marginal fold 

 of the patagium, and merges with it about halfway between the 

 humerus and carpus. When I come to discuss this muscle iu 

 the Ilinindinidw I will enter more fully upon it, its relations, 

 and tlie birds wherein I have thus far detected its presence. 



14. The musculature of the lower larynx of Ampelis cedrorwn 

 is of a very perfect Acromyodian type; I distinctly make out 

 five pairs of intrinsic muscles inserted, as usual in Passeres, into 

 the ends of the three upper bronchial semi-rings ; and, in addition 

 to these, there is a well-developed pair of sterno-tracheales. 



These lower laryngeal muscles are here not only firm and 

 fleshy, but easily individualized — a feat best accomplished with 

 a pair of dissecting-needles, under the 2-inch objective of a good 

 microscope. 



Both in structure and position, then, the syrinx of A^iipelis is 

 of a typical Passerine type. 



15. Turning next to th.Q pectoral muscles, I find all three — the 

 pectoraUs major, the p. secundus, and p. tertius — to be present 

 and fully developed. They also have their usual origins and 

 insertions. 



16. In examining the muscles of the thigh, with their vessels 

 and nerves, I find that the ambiens and accessory femoro-caudal 

 are both absent, while the femoro-caudal, the semimembranosus, 

 the semitendinosus, and accessory semitendinosus are all present. 

 The main artery is the sciatic ; the main nerve the sciatic nerve; 

 and the main vein the femoral. 



In all of these particulars Ampelis cedrorim agrees with the 

 highest types of Passerine birds. 



17. At the lower third and at the back of the tarso-metatarsus 

 I find in both leet that the tendons of the flexor longus liallucis 

 and ihe flexor profundus digitorum are not connected by a fibrous 

 vinculum. This is also another Passerine character. 



18. In examining the heart and great vessels, I find but one 

 carotid artery — the left one — passing up in frojit of the vertebrae 

 in the neck. 



19. I find the nostrils in Ampelis but very feebly partitioned 

 from each other by a median membro-cartilaginous septum. 



