394 



MORPHOLOGICAL STUDIES OP THE MACEOCHIRES. 



Plate XXII. 



Fig. 24. Eight lateral view of the skull of Micropus melanoleucus, S ; X ^ 

 Lettering of parts as before. This is the same specimen from whic 

 I drew the basal view in a former memoir on the Macrochires (P. Z. S. 

 1885, p. 899, fig. D). 



25. Eight lateral view (X 2) of the skull of Tachycineta thalassina, c?. 

 Lettering of parts as before. 



26. Superior view ( X 2) of the skull of Tachi/cineta thalassina, mandible 

 removed. This figure and figure 25 refer to the same specimen from 

 which I drew the figure in my former memoir (P. Z. S. 1885, p. 899. 

 fig.F). 



27. Eight lateral view of the skull and mandible of TrocMlus rufus, adult 



; X 4. Same lettering as before. 



28. Outer aspect of the muscles of the right arm in Trochilus platycercus. 

 Very much enlarged, t, triceps ; tp. b, tensor patagii brevis ; tp. I, 

 tensor patagii longus ; c. m. r. I, extensor metacarpi radialis longus ; 

 tn, a tendon to the tensor patagii brevis. 



29. Outer aspect of the muscles of the right arm in Chcetura pelagica. 

 Enlarged rather more than twice. Lettering same as in fig. 28. 

 This figure and the last were drawn by the author directly from his 

 own dissections. 



Plate XXIII. 



Fig. 30. Ventral aspect of the pelvis of Micropus melanoleucus, X 2. 



31. Ventral aspect of tlie pelvis of Trochilus rufus, X 3|. 



32. Eight lateral ^ iew, life-size, of a day-or-two-old nestling of Jrochilus 

 Calliope. 



33. Anterior aspect of the trachea of Trochilus rufus, X 4;^. 



34. Digestive tract of Trochilus platycetcus, X 2 J. 



35. Anterior aspect of Trochilus Calliope, adult, with the chest-wall and 

 other parts removed to show the relative size and position of organs. 

 I. c, left carotid ; H, heart ; r. I, right lobe of liver ; I. I, left lobe of 

 liver. X 2^. 



36. Same view and similar dissection of Micropus 'melanoleucus. 8, 

 stomach, with other lettering as in figure 35. Somewhat enlarged. 



Plate XXIV. 



Fig. 37. Left lateral view of a plucked specimen of Micropus melanoleucus. 



38. The same of Chcutura 2>elctgica. 



39. The same of Trochilus platycercus. 



These are all life-eize figures of male birds obtained by careful contour traces 

 directly from the bodies of the specimens, and are not intended to show any 

 part of the pterylography. 



