368 ME, E. DEGEN ON ECDTSIS. 



tlieiv sequence of growth), and not, as one would have expected c', (/', and c', were 

 they making their appearance in synchronism with c, d, and e. Four specimens show 

 this phase of moult, viz. Nos. 7 (diagr. C, Plate XXXVI.), 8, 9 (partially in arrear), 

 and 10 (see also Plate XXXVI., diagr. D), partially in advance of development. So 

 well, however, does the latter one (No. 10) mark this stage and also the following, 

 viz. that of (/ in its beginning, which latter is the moult of primary VII., that it has 

 been added also to the series of diagrams, in which it is marked D, as illustrating a 

 case of transition for the two stages. 



Diagr. D, showing transition between stages /'and ff. (Plate XXXVI.) 

 This represents specimen No. 10, and referred to above. This individual is very 

 asymmetric in moult, both for bilateralism and left-sided development. It exhibits 

 the somewhat rare occurrence on its left-side cubitus of synchronously shedding no 

 less than three remiges : viz. X. belonging to stage /"', II. stage g', and very prema- 

 turedly VI., as belonging to a much later stage, /. e. that of k'. Its right side fairly 

 ajjrees with the normal condition. 



DiAGK. E (stage </). (Plate XXXVII.) 



Stage ff, or the replacement of metacarpo-digital remex VII. and synchronous in 

 growth with cubital remex II. (g') (as referred to for the last specimen, No. 10), is not 

 clearly defined in either of the five or six individuals which share this phase of the 

 moult. For instance, in No. 12 this phase is shown in the cubital portion only; 

 while in its hand portion the changes are in progress only as far as remiges VI. on 

 both sides. Similarly No. 13 for its left side, while the right side of this specimen 

 shows stage g in a normal condition. 



An otherwise clear case of this stage of development obtains for specimen No. 15 ; 

 but this individual, being a later acquisition than No. 14, which represents a typical 

 case of the next following phase, or that of h, I have consequently not admitted to the 

 diagrams, because of the desirability for conforming to the order in the succession of 

 the dates as near as possible. 



Specimen No. 11 therefore has been substituted to supply the present Diagr. E, 

 Plate XXXVII. , as supplementing the part development of this stage of g, referred to 

 in the previous diagram D. 



Diagr. G (stage h). (Plate XXXVIl.) 



The next phase in the moult is that of metacarpo-digital remex VIII., or stage of h, 

 which appears in regular sequence in the numerical order of the feathering of the 

 hand portion. Corresponding in synchronous development on the cubitus with this 

 quill is remex III., lettered h' . 



As mentioned above, specimen No. 14 shows this phase distinctlj', though in its 



