. On the anatomy of vertebrates [electronic resource] . some degree with that in Mammalia producedby the junction of the hypogastric plexus withbranches of two or three of the sacral termination of the sympathetic is formedby a ganglion impar near the end of thecaudal vertebras. The abdominal ganglionsin small birds lend themselves favourably to Sympathetic ganglion of a _ o r Greenfinch, magnified, as seen the demonstration oi the structure oi these under the compressor. n , , . ■■ centres oi the sympathetic system, becomingtransparent under pressure, and permitting the nerve-vesic
. On the anatomy of vertebrates [electronic resource] . some degree with that in Mammalia producedby the junction of the hypogastric plexus withbranches of two or three of the sacral termination of the sympathetic is formedby a ganglion impar near the end of thecaudal vertebras. The abdominal ganglionsin small birds lend themselves favourably to Sympathetic ganglion of a _ o r Greenfinch, magnified, as seen the demonstration oi the structure oi these under the compressor. n , , . ■■ centres oi the sympathetic system, becomingtransparent under pressure, and permitting the nerve-vesicles tobe well distinguished from the nerve-chords: the latter only arerepresented in fig. 50, showing the finer filaments, c, that bendround the periphery of the ganglion, as if by resolution of anddivergence from the main chords entering at a and emergingat b, b. § 140. Organ of Touch in Birds.—The epithelial papilla?2sheathed upon vascular ones of the corium3 on the sole of thetoes of most Birds relate to mechanical rather than to sensational. 1 Liv. p. 104. 2 xx-. vol. iii. p. 239, preps, nos. 1902-1906. 3 lb. preps. 1400 (Eagle), 1401 (Ostrich). OEGAN OF TASTE IN BIRDS. 129 ends, giving a closer grasp of the perch or the prey, and a firmertread of the hard ground. The digital villi are unusually long inthe Capercailzie (Tetrax urogallus) enabling it to grasp withmore security the frosted branches of the Norwegian integument of the toes is sparingly supplied with nerves inall Birds; but it may be supposed that the more delicatelypapillose slender flexible digits of the smaller nidificators guide,by sensations analogous to touch, in the complex interweavingsof the materials of such beautiful structures as the pensile, domed,and otherwise adaptively perfected nests fabricated by the Tailor-birds, and most Cantores. Actions indicative of tactile exploration have hitherto beenobserved to be performed by the bill, exclusively, in in most of th
Size: 1092px × 2287px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubject, booksubjectbirds, booksubjectfishes
