40 Shufeldt, Anatomy of the Passenger Pigeon. [j an< 



Icp. longus colli posticus muscle. (Fig. 3.) 



II. left lobe of liver. (Figs. 3, 4 and 5.) 



mi. museums intermedius of the gizzard. (Figs. 3, 4 and 5.) 



oc. oblique condyle of right humerus. (Fig. 2.) 



oc' oblique condyle of left humerus. (Fig. 2.) 



oe. oesophagus. (Figs. 3, 4 and 5.) 



of. os furculum. (Fig. 3.) 



P. pelvis. 



ph. pharynx or entrance to oesophagus. (Fig. 5.) 



Pm. pectoralis major muscle. (Figs. 2 and 3.) 



Pr. proventriculus. (Figs. 4 and 5.) 



pu. pubic bone of pelvis. (Figs. 2 and 3.) 



py. pygostyle. (Fig. 2.) 



r.c. right coracoid. (Fig. 3.) 



rg. rima glottidis. (Figs. 3 and 5.) 



rm. rectus capitis posticus major muscle. (Fig. 2.) 



s. lower larynx and bronchial tubes. (Fig. 5.) 



sk. skin of head and neck of the left side. (Fig. 2.) 



sk.p. parietal region of cranium. (Figs. 2 and 3.) 



T. tongue. (Figs. 3, 4 and 5.) 



tl. tracheo-lateralis muscle. (Fig. 7.) 



tm. teres et infraspinatus muscles. (Fig. 2.) 



tp. transversus peronei muscle. (Fig. 2.) 



tr. trachea. (Figs. 2, 4 and 5.) 



xa. anterior xiphoidal process of sternum of right side. (Fig. 3.) 



xp. posterior xiphoidal process of sternum of right side. (Fig. 3.) 



Plate IV. 



Fig. 2. Skinned head, neck and trunk of Ectopistes migratorius; nat. 

 size. The reversed skin attached to the base of the mandibles. Humeri 

 and femora still attached and partly covered with their muscles. Forearm; 

 hand; the pelvic limbs below the knee, and the uropygial glands have all 

 been removed. 



Plate V. 



Fig. 3. Neck and trunk of Ectopistes migratorius (same specimen). 

 Skull and associated parts anterior to aural apertures have been cut away. 

 Hyoidean apparatus, trachea and oesophagus drawn down considerably 

 below normal position. Crop empty and wrinkled up. Os furculum dis- 

 located at right shoulder, and right coracoid thrown out of its sternal articu- 

 lation. Right pectoral muscles and other structures dissected away from 

 sternum and drawn far to one side. Right side of sternum in full view. 

 Thoracic and abdominal cavities opened up ventrally, and heart, left lobe 

 of liver, gizzard, etc. exposed to view. 



