246 ME. W. P. PTCEAFT ON THE 



the fold. These feathers help to form the periphery of the disc, which is continued down- 

 ward and forward to join its fellow of the opposite side heneath the jaw^ (PI. 26). 



Ramal area extends from the rhamphotheca of the lower jaw backwards to the 

 level of the region where the opercular and postaural folds coalesce. The peripheral 

 disc-feathers divide it into an upper and a lower portion (PL 26). 



Interramal area broad, sending off on either side a single row of feathers to join 

 the H a m a 1 area in the region where it merges with the pt. colli ventralls. 



Apt. colli laterale extending on to the circumaural fold as far as the peripheral disc- 

 feathers ; from its upper border, bounding the pt. colli dorsalis, it is continued as a very- 

 slender space on to the pteryla capitis, terminating at a point somewhat behind the level 

 of the region where the anterior ends of the pre- and postaural folds coalesce. 



Pt. colli dorsalis tapering from the head backwards. Lateral neck-folds of sUght 

 extent ; wdthout retractor-muscles. 



Pt. spinalis. — Branches of the interscapular fork arising about halfway dowTi inter- 

 scapular region ; arms short, 3 feathers in width, not extending to the end of the scapula. 



Branches of the lumbar fork represented ])y a single row of feathers arising far forward 

 on a level with the ends of the scapula ; they embrace the arms of the interscapular fork. 

 The stem of the fork bifurcated posteriorly, but terminating short of the oil-gland. 



Pt. ventralis. — Outer branch joined to the median by a single row^ of feathers, abruptly 

 expanded near its middle to 3 feathers in width. Median branch broad, with a strong 

 recurved limb springing from its free end — the " hook." Inner bi-anch broad, arising 

 from the median at the point where the latter passes over the acrocoracoid region from 

 the neck ; it follows the course of the furculum for some distance, then runs backwards 

 to join its fellow of the opposite side in front of the cloacal aperture. 



Pt. humeralis. — Not connected anteriorly witli tlie pt. ventralis. 

 Pt. alaris : — 



Metacarpo-digital remiges 11 ; the 11th a remicle, very small, little more than half as 

 large as its dorsal major covert ; the 6th remex the longest, giving the wing a short, 

 rounded appearance: the 5th to the 9th remex having the distal end of the outer vane 

 more or less emarginate ; outer vane of 10th serrate. 



Cubital remiges 15. 

 Tec trices : — 



T. major es. — Those attached to the dorsal surface of the cubital remiges of uniform 

 length, save the 6tli, which is distinctly shorter than the 5th or 7th. 



T. medicr. — 1-5 of the cubital remiges of the dorsal surface gradually increasing in 

 length, and distinctly the longest in the row. 



T. minores. — 1-5 of each row of the dorsal minor coverts markedly longer than the 

 remainder of the coverts of their respective rows. 



Pt.femoralis. — AVell developed; femoro-crural baud strong, terminating on the crus, 

 a short distance below the knee. 



Pt. criiralis. — Continued downwards over the acrotarsium and acropodium ; feathers 

 long and thickly placed. Plauta having the proximal end bare. Penultimate phalanx 

 of toes scale-covered. 



