REPORT ON THE AMPHIPODA. 1637 



1882. Costa, Achille. 



Rapporto preliniinare e somniario sulle ricerche zoologiche fatte in Sardegna 



durante la primavera del 1882. (Adunanza del dl 14 Ottobre 1882.) Eendiconto 



dell' Accademia delle Scienze fisiche e matematiche. Anno XXI. Napoli, 1882. 



pp. 189-201. 



The only remark upon Amphipoda is, at page 193, that to genera previously collected there are 

 added some species of Gammarus, still awaiting examination. 



1S82. Thomson, G. M. 



Additions to the Crustacean Fauna of Neiv Zealand. [Read before the Otago 

 Institute, 22nd November, 1881.] Transactions of the New Zealand Institute, 

 Vol. XIV. pp. 230-238. Pis. XVII., XVIII. 



Prior to describing Anonyx corpulentus, n. sp., pi. xvii. figs, la-/, Mr. Thomson remarks that 

 the characters on which the genus Anonyx " is separated from Lysianassa are very 

 insufficient, being mainly subchelate nature of the first pair of gnathopoda, and secondly 

 the cleft telson." The new species, he says, "is an Anonyx in all respects, except that its 

 telson is entire, which is the case also with A. plauttis, Kroyer, an European species." 

 Anonyx plautus is transferred by Boeck to Onisimus. "Anonyx exiguus," Stimpson, is 

 described and partly figured, pi. xviii. figs. 2a-e. Phoxus batei, Haswell, is described and 

 partly figured, pi. xvii. figs. 2a— e. This species appears to come near to Phoxus bassi, n. sp., 

 of this Report, but to be distinguished from it by the differently shaped first joint of the 

 fifth peraeopods, the more unequal rami of the third uropods, and the shorter telson ; the 

 differences in the antennae are probably due only to age or sex, and the very considerable 

 difference between the second gnathopods of the two forms is not necessarily specific. 

 Polycheria obtusa, n. sp., pi. xvii. figs. 3a-d, is in my opinion, as elsewhere stated, a 

 synonym of Tritxta anfardica, Stebbing. Leucothoe traillil, n. sp., pi. xviii. figs, la-a", is 

 described. Three varieties of Dana's Fiji species, Gammarus qwulrimanus, are noticed 

 under the name " Moera quadrimanus, Sp. Bate," with figures of the second gnathopod 

 of two of the forms, pi. xvii. figs. 4a, ib. Moera petriei, n. sp., pi. xviii. figs. 3a— f, 

 is described, a species afterwards identified by Mr. Chilton with Megamoera sub-carinata, 

 Haswell, and in this Report transferred to the genus Elasmopus, Costa, see p. 1024. In 

 the family Corophiida?., the new genus Iphigenia is thus described : — 



" Body much depressed and flattened. Antennas short and thick, subequal. Coxae of the 

 first four segments of the pereion very large, those of the succeeding segments small. 

 Basa of the three pairs of posterior pereiopoda dilated. Gnathopoda simple, unguiculate. 

 Three posterior pairs of pleopoda very small, curved inwards, with minute simple rami. 

 Telson single, entire. 



" The very remarkable Crustacean (Amphipod) for which this genus has been formed, appears 

 on first inspection to be an Isopod. It is only after closer examination that it is seen to 

 be allied to Trillins [Icilius], Dana, one of the most anomalous forms of the Corophiides. 

 From this genus it is, however, at once distinguished by the very large coxae of the four 

 anterior segments of the pereion, and by its short, thick, subequal antennae." 



The type species, Iphigenia typica, n. sp., is described and figured, pi. xviii. figs. Aa-g. As 

 already pointed out by Dr. v. Martens, the name Iphigenia is preoccupied and requires to be 

 changed. In many respects this curious little species seems to approach the equally 

 curious little Phlias serratus of Guerin, but while the latter is laterally much compressed, 



