. The structure and classification of birds . radistinction to what we find in other birds,they are inserted by a common orifice. These cseca dwindle gradually in diameter towards thetip, and are provided internally with a spiral valve of abouttwenty turns. I have attempted to compare these cseca withthose of the Martineta tinamou (see p. 488). In the latterbird the cseca are furnished with numerous short diverticula, E. Bemocohamps, Sur la Glande Gastrique du Nandou, Btdl. Ac. Belg. L<1880), p. 114. STRUTHIONES 507 which are the outward expression of a reticulate internal■structure, like a
. The structure and classification of birds . radistinction to what we find in other birds,they are inserted by a common orifice. These cseca dwindle gradually in diameter towards thetip, and are provided internally with a spiral valve of abouttwenty turns. I have attempted to compare these cseca withthose of the Martineta tinamou (see p. 488). In the latterbird the cseca are furnished with numerous short diverticula, E. Bemocohamps, Sur la Glande Gastrique du Nandou, Btdl. Ac. Belg. L<1880), p. 114. STRUTHIONES 507 which are the outward expression of a reticulate internal■structure, like a ruminants stomach. Towards the extremityof the caecum the folds cease to he so definitely arranged ina network, and some to present an indication of a spiral dis-position. Bhea has also very large caeca, and there aretraces of the spiral valve of the ostrich. The caeca of thecassowaries and the emu, as will be seen from the table ofmeasurement, are very much smaller than those of theostrich and Bhea. Gadow mentions an obscure formation of.
Size: 1422px × 1757px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
