660 Mr. R. Shelford on the Pterylosis of the 
Carpal remex fy covert are present: the former is very much 
smaller than the latter, which is not 
readily distinguishable from the tect. 
majores of the cubitus. 
Cubitus. 
Cubitals. 12. Decreasing in size from before backwards, 
Nos. 11 and 12 being quite minute. 
Tectrices majores. Proximally continuous with the para- 
pteron. 
Tect. mediae. 11 + 1 which belongs to the ala spuria: 
that is, the series commences by just 
one member in front of the tect. 
majores, and terminates by just one 
member short of it, and there is a 
broad gap between the two series. 
Tect. minores. 10+2 which belong to the ala spuria. 
I can distinguish only one row. 
Tect. marginales. Distally one row, which is short and 
composed of 9 units only, behind 
the 3rd unit the second row begins ; 
this is composed of 12 units: behind 
its 4th unit the third row begins and 
runs along the anterior border of the 
patagium to join the pt. humeralis. 
Ala spuria . 4 trichoptiles, in addition to those already 
alluded to as constituting the distal 
members of the t. mediae and t. minores. 
Inner Aspect. 
Manus . A few minute points, the forerunners of 
the t. minores inf. 
Cubitus . Nothing as yet has made its appearance. 
The egg-tooth is still prominent; the eyes are not yet 
opened. The foot now more nearly approximates in appear¬ 
ance to that of the adult; the second digit is the shortest, 
the third the longest, and the claw on the hallux is now seen 
to be a trifle longer and less curved than those on the other 
toes. The tarso-metatarsus is covered with transverse scutes, 
those on the dorsal surface being the larger and more dis¬ 
tinct ; each digit is dorsally covered with one row of transverse 
scutes, which laterally pass more or less abruptly into the 
reticulated surface of the planta. 
Stage 3 (PI. XIII. C, and figs. 4, 5, p. 661).—A nestling 
with a total length of 145 mm. is taken as typical of this 
