1. The earlier stages in the development of the pectoral skeleton of the salmon are fundamentally the same as those of the stickleback (p. 370).
2. The mesocoracoid appears late in the development of the salmon, and is associated with the rotation of the glenoid border into a transversely horizontal position (p. 368).
3. There is no sign of a mesocoracoid during development in the stickleback, and this is associated with the rotation of the glenoid border into a vertical position (pp. 370 and 371).
4. Those Teleosts without a mesocoracoid probably constitute a group separate and not originating from those Teleosts with a inesocoracoid (pp. 377 and 378).
5. The postcoracoid process, which is so prominent a feature during development, represents the metapterygium (pp. 373 and 374).
6. The so-called "interclavicle" of the stickleback is not a part of the coracoid, but arises as a separate dermal ossification. It is not homologous with the bone of the same name in the sturgeon, and should therefore receive a different name, e.g. infracleithrum (p. 379).