242 Dr. C. Cliilton on a Neio-Zealand 



was dcsciibcd by Thomas Scott in 1803, but was referred to 

 the genus with some doubt, as it possessed several characters 

 that seemed rather to indicate that it should be pUiced under 

 Stajoplax *. Some contusion aheady seems to have crept 

 into the discussion, for while Haswcll's description in his 

 Catalogue says that the superior antenniu are without a secon- 

 dary flagellum, and this description is quoted in full by 

 8tebbiiig, yet the latter describes his species Cyproidia dam- 

 noJiiensis as having a minute one-jointed secondary tiagellum 

 on the superior antenna^, without indicating in any way, so 

 far as I can find, that in this res])cct his species differs from 

 the generic description given by Ilaswell. It was apparently 

 this that led Scott to say that Cyproidia and Steyoplax differ 

 in " the apparent presence {Cyproidia) or absence [Stegoplax) 

 of a minute secondary appendage to the superior antennie " f, 

 though a few lines further on he recognizes that in possessing 

 no secondary appendage to the superior anteniue his species, 

 ? Cyproidia brevirostria, " agrees belter with Has well's amended 

 description than with that of the Eev. Mr. Stebbing, as well 

 as exhibits a close affinity with Stegoplaxy Whatever the 

 author of Cyproidia may have intended, it appears that his 

 genus is fated to be considered as having the possession of a 

 minute secondary appendage to the u])per antennae for one of 

 its characters, for Sars, in his recent work, in comparing the 

 genus with his Stegoplax, speaks of Cypjroidia^ " as recently 

 redescribed by Mr. Stebbing," as possessing a secondary 

 appendage, though he also points out other differences, as, 

 indeed, previous authors had also done |. 



Delia Valle places both Cyproidia and Stegoplax as syno- 

 nyms of Peltocoxa, Catta §, as had been previously suggested 

 by Stebbing il; but with the discovery of new species it is 

 hardly likely that these genera will be allowed to drop, and, 

 on the other hand, Stebbing has quite recently establislied a 

 new genus I'aracyjnoidea, differing from Cyproidia in several 

 small points, for the species Cyproidia lineata, Haswell^. 

 At the same time he also established the new genus Tetra- 

 deion for the species Cyproidia ? crussa that I provisionally 

 referred to Cyproidia in l^H'l **, but though both genera 

 belong to the Amphilochidai, Tetradeion is very different from 

 the true Cyproidia. 



* Ann. & Mag. Nat. Hist. ser. G, vol. xii. 189.j, p. 244, pi. xiii. 

 t L. c. p. 245. 



j ' Crustacea of Norway,' i. p. 232. 



§ ' FauDa iind Flora des Golfes Neapel/ Monograph 20, p. 647. 

 11 * Itepoit on the ' Clialleuger' Amphipoda,' p. 441. 

 ^ Ann. & Mag. Nat. Ili.'-t. ser. 7, vol. iv.p. 207. 

 ** ' Transactions New ZeahiLd Institute,' xv. p. fcO, pi. iii. lig. 1, 



I 



