PITYLOOEW OF THE PAL.EOnXATILE A\|) XEOOXA't'llE. 289 



Pig. 3. A neossoptile of lilim amrrirnnn (p. TG4): neither tlic main nor Llie aflersliaft 

 have a distinct rliachis. The main shaft is represeuted by three stiffened 

 rami, prnduced into filaments as in Tinamnns and Ostrich, the aftersluift by 

 nnmerous slender rami. 



Fig. 3 a. A portion of a radius from fig. 3 (p. 104). Note tlic aliscnce of fila. 



Fig. 4. A neossoptile of Dronnt'titi iiora'-JinUaiidiii- (p. l^\'l). 'i'lie aftershaft is barely 

 distinguishable ; the main shaft well developed : compare with figs. 3-7. 



Fig. 4 a. A portion of a radius of fig. 4. Fila are yet represented but arc small. 



Fig. 5. A jKirtinn of a radius of ('r/siKin'n.s casiiarins, showing the still further 

 suppression of the fila. 



Fig. G. A neossoptile oi yljjfef//x nioufclli (p. 103). There is no aftershaft. 



Fig. G a. A poitidu of a radius of fig. G. Note that fila are numerous and large, 

 indicating a less degenerate condition than figs. 4 a and 5. 



Fig. 7. A neossoptile of tStnitlilo irnneJiis, showing the three peculiarly modified 

 rami described on p. 104, and representing the main shaft, and the numorons 

 downy rami representing the aftershaft. 



Fig. la. A portiou of a radius of fig. 7. These arc flattened as in (^'nji>tnri (fig. 2). 

 Note the " eye-spots." 



Fig. 8. Dissection of the air-sacs of the left side of a (kisiiarhis intajipeniJiciilatiis 

 (p. 252), showing the three divisions of the anterior intermediate sacs and the 

 positions of the ostia throughout. Note the position of the anterior end of 

 the posteri(;r abdominal air-sac — forcing down the roof of the posterior inter- 

 mediate. The posterior abdominal, furthermore, is seen to take the form of 

 a more or less sausage-shaped sac adherent to the inner wall of the posterior 

 intermediate. It encloses a part of the kidney. 



Fig. 9. Dissection of the left lung of C<tsif(fr/us uiiajjjicrid/atlafiis (p. 252), to show 

 the costo-]iulmonary muscle, meso-, ecto-, aud euto-bronchia and their 

 ramifications. Note that the ento-bronchia 1 and 3 between them supply all 

 the tubulae of the ventral surface of the lung described on p. 252. The 

 systems fed by ento-br(jnchium 1 have been exposed by dissection, those fed by 

 ento-bronchiiim 2 lie caudad of these and are concealed by the aponeurosis. 



Fig. 10. Ventral aspect of a dissection of the wing of an adult Cus/iariiis vasuariKS, 

 to show the hypertrophied calami described on p. 1C5. 



Fig. 11. Dorsal aspect of a preparation of the wing of an Ostrich. After 

 Wraij. 



Fig. 12. Dorsal aspect of a portion of the wing of Jllica americauu (p. 150), to show 

 the remarkable distribution of the coverts in transversely oblique bundles. 



Fig. 13. Ventral aspect of the wing of Aptenjx mantclli (p. IGl), to show the number 

 of remigesand their remarkable resemblance to the young Cassowary described 

 on p. 105. 

 VOL. XV. — PART V. No. 24. — Ikcemher, 1900. 2 s 



