1885.] trochilidjE, caprimulgid.*:, and cypselid,e. 915 



EXPLANATION OF THE PLATES. 



[All the figures in the Plates were drawn by the author 

 from the specimens.] 



Pr,.\TE LVIII. 



Fig. 1. Skull of Trochihcs alexandri, superior aspect, with mandible removed, 

 X 4. Pm.r. premaxillarv ; a, an ossiflcatiou from the same ; m.Tp, 

 niaxillo-palatine ; ]Sa, nasal ; I, lacrymal. 



2. Right lateral view of Trochiius alexandri, X 4, same .specimen; 



q, quadrate; Vo, vomer; pp, pars plana; and other letters as in 

 fig. 1. 



3. Lender view of the skull of Trochiius ahxavdri, X 4, same specimen, 



mandible removed. Ff, pterygoid ; Fl, palatine ; and other letters 

 as before. 



Plate LIX. 



Fig. 1. Eight lateral view of the skull of Chordedlles acufipennis fcxensis, x 2; 

 letters as in Plate LVIII. 



2. Inferior view of mandible of the same specimen as in fig. 1. Life- 



size. 



3. Superior aspect of the skull of Chordediles acutijpennis tcxensis, X 2; 



same specimen as before; mandible removed. Letters have the 

 same meaning. 



4. Inferior view of the skull of Chordediles acutipcnms texends, X 2 ; 



same specimen as in fig. 1 ; mandible removed ; h.jit, basisphenoid. 

 Other letters as before. 



Plate LX. 



Fig. 1. Pectoral aspect of sternum of Vanyptila saxaf'dh, X 2. 



2. Slioulder-girdJe of I'ani/pfila saxaiilis, same spe'-imen, X 2 ; cl, cla- 



vicle ; z, the ledge it develops on the outer side of its head for the 

 coraroid ; c, coracoid ; s, scapula ; s' and cV, same as z and cl, but 

 the bone they refer to is a front view of the furcula, shown in side 

 view at cl. 



3. Pectoral aspect of sternum of Trochih's alexandri, X 4. 



4. Eight lateral view of the sternum of Fanyptilu saxaiilis, x 2, same 



specimen as shown in fig. 1 . 



5. Anterior aspect of right coracoid of Trochiius alexandri, X 4 ; same 



specimen as in Plate I. Compare this bone with the Swift's coracoid 

 shown in fig. 2. 



6. Eight lateral view of stej-num of Trochibis alexandri, x 4 ; same speci- 



men as in Plate I. Compare this sternum with the very differently 

 formed one from a Swift in fig. 4. 



Plate LXI. 



Fig. 1. Left pectoral limb of Chordediles acufipennis fcxensis. life size, palmar 



aspect ; same specimen as shown in Plate II. h, humerus ; u, ulna ; 



r, radius ; re, radiate ; tie, ulnare ; p, pollox ; i', index metacarpal ; 



i" and i'", its phalanges; m', middle metacarpal; 7/i", its digital 



joint. 



2. Shoulder-girdle and sternum, from the same specimen as in fig. 1, left 



three-quartering view ; life-size. The several bones in situ. 



3. Left jjectoral limb of Trochiius alexandri, X 4 ; from the same speci- 



men as in Plate LVIII. Letters have the same significance as tiiose 

 in fig. 1, with s, s', s", and s'", se.samoids; /, )3rocess of index phalanx. 



4. Left pectoral limb of Pant/ptila scixal/iis, x 2 ; from the saiae speci- 



men used in former figures ; both these limbs are, with the exception 

 of radius and ulna, seen upon aneonal aspect, the excepted bones 

 being rotated nearly to the radial view. Letters have the same sig- 

 nificance as those in figs. 1 & 3. 



