412 yni. E. DEGEN ON ECDTSIS. 



(3()) I'vCKAi-r, W. P., A.L.S. — "Some Facts concoriiiiig tlie so-called ' Aqiiiutocubitalism ' iu the 

 Uird's Wing/' Joum. Linn. Soc. Lond., Zool. vol. xxvii. July 1, IS'J'J, pp. 2.'56-2.j(;, 



pis. M-in. 



(40) ScHLEGEL, Dr. IIkhmaxn. — " Sendschreiben an die am G'*" Julius 1853 zu Altenburg versam- 



melten Naturforscher," Naumaiinia, 18o2, ii. Ikl. ii. Heft, No. 1, pp. 19-21 &,c. 



(41) ScHLnaiiL, Dr. IIeumann. — "Vcrfarbung das Geficders," Journ. i'. Oruith. i. Jalirg. 1858, 



i.Heft, No. 1, p. C)7. 



(42) ScHLEGEL, Dr. Heii.man'x. — "Ueber das Wachsthnra und die Farbenveranderungen dor 



Federn der Vogel," idid. iii. Jahrg. 1855, ii. Heft, No. 19, p. 255. 



(43) SuNHEVALL, C. J. — " Ucbcr die Flugel der Vogel," ibid. ii. Jahrg. 1855, ii. Heft, No. 1 1-, 



pp. 118-163. 



(44) WiTTMEK Stone. — " The Molting of Birds, with special reference to the Plumages of the 



smaller Land-Birds of Eastern North America," Proc. Acad. Nat. Sc. Philadelphia, 189'!, 

 pp. 108-127. 



(45) Wray, R. S., B.Sc. — "Note on a Vestigial Structure iu the Adult Ostrich representing the 



Distal Phalanges of Digit III.," Proc. Zool. Soc. Loud. 1887, pp. 283 & 284, text- 

 figures 1-4. 



(46) Wray, R. S., B.Sc. — " On some Points in the Morphology of the Wings of Birds," i/jid. 



pp. 343-355, pis. xxix.-xxxii. 



XI.— EXPLANATION OF PLATES XXXVI.-XXXVIII. 



The Roman figures placed at the head of each diagram denote the numerical order of the flight- 

 feathers, as counted from the wrist-joint, outwards for the digital portion, inwards for the cubital 

 portion of the left and right wing respectively. 



The broader dark vertical bars indicate those remiges which are in progress of moult. 



The symbol 0, placed over the bar indicated by dots only, signifies this particular remex is 

 shed off. 



The numbers placed immediately above the bars express the actual length of growth of the remex 

 represented by that bar, in millimetres. 



The proportionate growth of the remiges in moult may be read off on the scale from 0-100 

 (100 standing for full growth), which is provided for each diagram. 



The small letters beneath each diagram indicate the chronological appearance of the remiges on 

 the two portions of the wing — plain letters for the metacarpo-digital ; with a dash, thus ', for the 

 cubital portion. 



