550 THE VOYAGE OF H.M.S. CHALLENGER. 



1884. ChEVREUX, fiDOUAHD. 



Suite d'une liste des crustaces amphipodes et isopodes des environs du Croisic. 

 Association fran9aise pour I'avancement des Sciences. Congres de Blois. 1884. 



Forty-four species of Amphipods are here enumerated in addition to the forty recorded by 

 M. Chevreux in 1883. The actual numher of distinct species in the list will be rather 

 smaller, when allowance is made for the instances in which separate names have been given 

 to the different sexes of the same species. This will be understood in most cases from the 

 notes which M. Chevreux has appended. 



1884. Chilton, Charles. 



Additions to the Sessile-eyed Ct^stacea of New Zealand. {Read before the 

 Philosophical Institute of Canterbury, ^OYemhev 15th, 1883.) The Transactions 

 of the New Zealand Institute, 1883. Vol. XVI. WeUington, '1884. Art. 14. 

 pp. 252-265. Pis. XVII.-XXI. 



Of a whale-louse, found on Euphijsefes potdi, a species said to be "identical with Viagia 

 brevieeps of the northern hemisphere," Mr. Chilton writes, " I can find no important 

 character by which these specimens can be distinguished from Cyamus ceti, as described 

 and figured by Bate and Westwood. The penultimate joints of the last three pairs of 

 legs are not quite so stout as shown in their figure, but this is evidently a character liable 

 to variation according to age, etc. The young taken from the pouch of the female closely 

 resemble those figured by Bate and "Westwood on page 90." 



WyviUea lowjimanus, Has well, is identified by Mr. Chilton with Fodocerus cylindricus. Kirk, 

 and renamed Podocerus longimanus, figured pi. xvii. fig. 2, in regard to which see Xote on 

 Haswell, 1880.' 



A new genus, Teraticmn, is thus defined : — •" Body small. Eyes two. Coxse of first four 

 segments as deep as their respective segments. Antennas with short flageUa; upper antenna 

 with a small secondary appendage. Mandible with an appendage. First gnathopod larger 

 than the second, subchelate ; second slender, chelate. Posterior pair of pleopoda uniramous. 

 Telson single, undivided." This must, I think, yield to Seha of A. Costa. The type 

 species, Teraticum typiciim, seems to be identical with " Seha Saunderdi," Stebbing. 



A new genus, Paranssnia, is thus defined : — " Antennse subequal, superior with a secondary 

 appendage, both with multiarticulate fliigella. Appendage of mandible with three broad 

 setose joints, as in Podocerus. MaxiUipedes with well-developed plates on ischios and 

 meros. Gnathopoda subchelate, first small in both sexes, second small in female, very large 

 in male. Last pair of pleopoda biramous, rami styliform. Telson single, ending posteriorly 

 in two conical projections." This genus was instituted to receive Paranseiiia typica, n. sp. 

 pi. xix. fig. 1, Paransenia longimanus, n. s., pi. xx. fig. 2, and Mxra dentifera, HasweU, 

 pi. xxi. fig. 2. Of these the first and third have the coxjb of the third person-segment in the 

 males " large, and produced along the inferior edge of the second segment." In the females 

 and in the other species the coxie are normal. In describing the genus Gammaropda, 

 Lilljeborg, Boeck does not choose the same characters as those used by Mr. ChOton, but when 

 the description of Boeck's Gammaropsis erythrojMhaJmus {inelanops, G. 0. Sars) is added to 

 that of the genus, and in like manner Mr. Chilton's specific descriptions are added to that of 

 his genus, it becomes, I think, clear that Paranee7iia cannot be separated from GammarojMif. 



