368 MR. J. BESWICK PERRIN ON THE 
and their farinaceous pulp. A few short hair-like stems were intermingled with the 
mass, probably fibres from the same plants from which the seeds or beans were obtained. 
I obtained a few specimens of almost perfect beans; they are somewhat smaller than 
the smallest specimens of the English bean. Their envelopes are hard, and of a pale 
brownish red colour. 
On opening the crop, the mucous lining was found to be exceedingly strong. In 
the cesophagus it was plicated longitudinally, asin higher animals. The plice traverse 
both segments of the crop in an arcuate fashion, becoming larger, more numerous, and 
more corrugated. The terminal point between the two segments is marked off by a 
strong vertical stem or modiolus, over which the mucous membrane is perfectly smooth. 
The total number of corrugations opposite the modiolus, and in the second segment, is 
twenty-seven. The plice are marked by transverse ridges. About eight of the plica- 
tions spring independently from the modiolus, and converge towards the pylorus of the 
crop. 
The mucous membrane is strong and thick. 
The whole conformation of the crop, especially on its posterior aspect, resembles the 
gizzard more than a crop. That the food undergoes rapid and powerful digestion in 
this alimentary cavity there can be no doubt, from the appearance which the contents 
presented. There is a slight constriction simulating a pyloric valve at the distal end of 
the crop. 
DESCRIPTION OF THE PLATES. 
PLATE LXIII. 
Figs. 1 & 2. Feather-tracts of Opisthocomus cristatus, after Nitzsch and Sclater. 
Fig. 3. Crop, large pectoral muscles, &c. 
tr. Trachea. cp". Lower segment of crop. 
o. Cksophagus. pe mg. Pectoralis magnus muscle 
cp’. Upper segment of crop. tb. Sternal tubercle. 
PLATE LXIV. 
Fig. 1. a. Concave surface of pectoralis magnus for reception of crop. 
6. Anterior and outer surface of pectoralis magnus. 
1, 2, 3. Factors of the extensor longus alaris. 
