a.

1

  1.  [SUB- 20 b.] Somewhat of the nature of a notochord.

2

1872.  H. A. Nicholson, Palæont., 334. The vertebral column is sometimes composed of distinct vertebræ, sometimes cartilaginous or sub-notochordal.

3

1875.  Blake, Zool., 202. Endoskeleton cartilaginous, subnotochordal.

4

  2.  [SUB- 1 b.] Situated beneath the notochord.

5

1888.  Rolleston & Jackson, Anim. Life, 334. After the formation of the notochord a small sub-notochordal rod of cells is developed.

6

1909.  J. W. Jenkinson, Exper. Embryol., 134. Underneath the notochord is the subnotochordal rod.

7