Seba saundersii, Stebbing.

1875. Seba saundersii, Stebbing, Ann. and Mag. Nat. Hist., ser. 4, vol. xv., p. 2, pl. xv., figs. 2, 2a-2c.

1884. Teraticum typicum, Chilton, Trans. N.Z. Inst., vol. xvi., p. 257, pl. xviii., figs. 1, 1a-1f.

1885. Seba typica, Chilton, N.Z. Journal of Science, vol. ii., p. 320.

1886.Seba typica, Thomson and Chilton, Trans. N.Z. Inst., vol. xviii., p. 148.

1888. Seba saundersii, Stebbing, “Report on the ‘C hallenger’ Amphipoda,” p. 783, pl. xlix.

In the full description given of this species by Mr. Stebbing in the “Challenger” Report he unites my Teraticum typicum with his Seba saundersii, saying that he thinks it must be identical with it. I originally had three specimens of my species, and I still have two of them (now mounted in Canada balsam), and, after having carefully compared them with Stebbing's full description and figures, I am quite convinced that he is right in making Teraticum typicum a synonym. The only point in which they differ is the one referred to by Stebbing—viz., the length of the first joint of the upper antenna. In both my specimens this is only as long as the second, while in his specimen, described in 1875, the second joint is “a little the longer,” and in the “Challenger” specimen “decidedly longer.”

His “Challenger” specimen is a female; and so, probably, therefore, was my third specimen, which resembled it in the shape of the first gnathopoda. This specimen was sacrificed for dissection in drawing up my original description. My two remaining specimens differ very considerably in the form of the first gnathopoda, and are probably males.^†

The “Challenger” specimen was taken off Patagonia, and Mr. Stebbing's original specimen either from South Africa or