This joint is durable, secure and easily made; it allows for expansion and by its use the risk of pipe sockets being cracked is avoided.
The anterior margin of the sternum, between the right and left anterior lateral processes receives in sockets the feet of the coracoids.
This method, however, was not found satisfactory: the projecting feet were liable to be broken off, and in 1799 or 1800 Jessop abandoned them, using instead separate cast-iron sockets or chairs, which were fastened to the sleepers and in which the rails were supported in an upright position.
Further examination of the enormous collections gathered by the author, and preserved in the Museum of Yale University at New Haven, Connecticut, showed him that this last bird, and another to which he gave the name of Apatornis, had possessed welldeveloped teeth implanted in sockets in both jaws, and induced him to establish (v.
In addition to the absence of prehensile power in their tails, douroucoulis, also known as night-apes, are distinguished by their large eyes, the sockets of which occupy nearly the whole front of the upper part of the skull, the partition between the nostrils being in consequence narrower than usual.