260 Transactions. — Zoology. 



against which it impinges, are fringed with numerous short 

 stiff setae. 



I had previously thought that this species might perhaps 

 be identical with Montagua marina, Spence Bate, and it cer- 

 tainly appears to resemble that species pretty closely, but 

 whether it is identical or not I cannot venture to say until I 

 have an opportunity of comparing specimens of both species. 

 It may perhaps be the same as Moniagna longicornis, Has- 

 well,''' but the description of that species is too brief to enable 

 one to decide. 



I have lately taken this species at Port Chalmers also. 



Seba saundersii, Stebbing. 



1875. Scha saundersii, Stebbing, Ann. and Mag. Nat. Hist., 

 ser. 4, vol. xv., p. 2, pi. xv., figs. 2, 2a-2c. 



1884. Tcraticum typicwn, Chilton, Trans. N.Z. Inst., vol. xvi., 

 p. 257, pi. xviii., figs. 1, la-lf. 



1885. Seha tyjnca, Chilton, N.Z. Journal of Science, vol. ii., 

 p. 320. 



1886. Seba tyjjica, Thomson and Chilton, Trans. N.Z. Inst., 

 vol. xviii., p. 148. 



1888. Seba saundersii, Stebbing, " Eeport on the ' Challen- 

 ger ' Amphipoda," p. 783, pi. xlix. 



In the full description given of this species by Mr. Stebbing 

 in the " Challenger " Eeport he unites my Teraticum typicitm 

 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 Steb- 

 bing'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 Steb- 

 bing — 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 



* Catalogue Australian Crustacea, p. 22G. 



t For description see Trans. X.Z. Inst., vol. xvi., p. 257. 



