Ribs in Mammalia / by R.J. Anderson.

  • Anderson, Richard John, 1848-1914.
Date:
[1889?]
Catalogue details

Licence: Public Domain Mark

Credit: Ribs in Mammalia / by R.J. Anderson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    The Fox. The first rib is rounded and enlarged at the lower extremity. The second has a large tangential diameter below. The outer surface becomes the anterior above and gets narrower. The flattening of the third reaches half the length of the rib so that the tangential diameter is large in the lower half. The tangential breadth of the fourth is less than that of the preceding. The anterior and posterior borders of the 2°'^, 3''^, 4^^^ and fifth ribs are very sharp below. The posterior ribs are rounded and rod like. Where two measurements are given in the following table, the radial comes first. 1 2 3 4 5 6 7 8 9 10 11 12 13 A 30 50 65 85 100 105 110 110 110 105 95 80 75 B 15 20 25 30 35 40 45 50 C 8 6 4 4 4 3 3 4 3,5 3 3 2,5 3 D 8 8 9 5 5 4 3 4 3 3,5 4 3 3 E 3 4 5x2 4x3 4x3 4x2,5 3x3 3 3 3x3 3x3 3x3 3 P 30 10 17 20 23 30 40 30 A and D are tangential. C near lower end. D widest. E at angles radial and tangential. For general see Giebel in Bronn. Felis Leo. In the Lion the breadths of the first four ribs diminish gradually as they are traced up from the lower ends. The remaining ribs have tangential breadths at the lower ends greatly in excess of the radial but they breadths diminish immediately as the ribs are traced up. The following are the breadths in the specimen examined 1'* 20 mm., 2-1 19, 15, 4*1^ 17, 5*1' 18, 6*'^ IG, 7«' 15, 8' 18, 9t»> 17, 10^i> 14, 11' 16, 12' 17, 13*^ 10. In the Jlyacna the 4', 5 and ribs are broad tangentially. Narrow at the extreme end, then wider higher up.