REPORT ON THE AMPHIPODA. 1'29 



"Corpus elongatum, compressum, articulatum ; styli caudales inferiores, superioribus 

 longiores; oculi magni, reniformes ; antennffl superiores articulo primo elongato, socundo 

 quintuplo longiore, articiilis aliis minutissimis ; autennaa iiiferiores articulo primo brcvo, 

 secundo valde elongato, artioulis aliis exiguissimis ; pedes sequales, monodactyli," with the 

 type species Ennne 2^unrtafa, " Corpore hyaline, lutesceute, lateribus rubro punctatis ; chelis 

 minimis ; pedibus, secundo pari, longissimis, apice ovatis, acutis." This is obviously 

 Risso's Talitrus ruhropunctatus of 1816. Without noticing this synonym, the British 

 Museum Catalogue names it Allorchestes imndatus, as a doubtful species, and with the 

 alternative suggestion that it may be the young of AnqMthoe rubra ; but the description 

 of the antennre and gnathopods excludes both these identifications. Guerin, 1825, suggests 

 the genus Atyhis for the species rubrojmridatus. It is characteristic of Risso that while in 

 the generic description he gives "tons les pieds ^gaux, monodactyles," in the specific 

 account we find "la premifere paire de pattes grele, courte ; la seconde fort longue ; les 

 autres longues et ^gales." The species was found in the spring, far from the shore, 

 the female carrying transparent eggs. He says of the animals of this genus (p. 100), 

 that they " restent toujours en pleine mer, et on les voit souvent sautiller a la surface de 

 I'eau pendant les fortes chaleurs." This does not favour Guerin's suggestion above- 

 mentioned. 



Talitrus nicxensis, n. s., is described as " corpore glaberrimo, hyalino, vitreo, pellucido ; oculis 

 purpureo-nigris : antennis, pedibus tarsisque violascentibus." This pellucid species, more 

 likely to be one of the Hyperina than a Talitrus, might, one would think, be identified and 

 more fully described by some one residing at Nice or in the neighbourhood. The same may 

 be said of Afylus corallinus, n. s., which Spence Bate believes to be probably Dexamine 

 spinosa. The genus Eupheus, Risso, is thus re-described, "Corpus elongatum, postice 

 gradatim acuminatum ; caput quadratum ; oculi globosi ; tentacula duo filiformia, multiarti- 

 culata ; thorax quiuquearticulatus, segmento anteriore majore, filamentis duobus corpore 

 longioribus instructus," with the type species Eupheus ligioides, of which its author says, 

 " le corps de cette esptce est compose d'un segment assez large, rattache a cinq autres plus 

 etroits, qui sont suivis d'un meme nombre plus petits, le dernier termine par deux courtci 

 appendices garnis chacun d'un long filet trts mince ; la tete est tronquee au-dovant ; I'ceil 

 petit, noiratre ; les antennes inegales ; les quatre paires de pattes sont cilices ; une belle 

 teinte jaune, blanche et verdatre le colore de toute part." Risso fancies that the genus has 

 much in common with Ligia. Bate and Westwood, following the lead of Desmarest, make 

 it a synonym of Apseudes, Leach, in the Tanaidai, among their Isopoda aherrantia. 



The Crustaces L^modipodes form the fourth Order. The first section includes Caprella, with 

 the species of his earHer work, " C. linearis" and " C. punctata" and NympiTwn, Leach, with a 

 new species "■N. arachnoideus," quite out of place in this group. The second section includes 

 Pygnorjonum (Fab.), Ciame, with a species "P. ceti, C. de la haleine," apparently a Cyamus, 

 although the habitat assigned " sur les baleinopt^res et les scombres " implies some confusion. 

 It includes also the new genus Hexona, " Corpus ovatum, postice abrupte acuminatum ; 

 thorax sexarticulatus ; cauda subtrigona, quinque articulata ; pedes sex ajquales, unguibus 

 curvatis, acutis, armati," with the species Hexona parasitica. As its habitat is on Bopyrus, 

 there seems to be little doubt that it is the male of Bopiyrus which Risso had observed 

 in its ordinary jjosition. Another new genus included is Zuphea " Corpus oblongum, 

 convexum ; caput subtriangulare ; ocuU magni, convexi ; thorax quinque articulatus, 

 articulis integris, approximatis ; cauda sex articulata, ultimo articulo elongato, triangulare ; 

 pedes sex sequales," with the species Zuphea sparicola, the habitat of which is sur les spares 

 (gilt^head), "dans le sillon des nageoires dorsalcs." This, like the preceding genus, is 

 probably an Isopod, the description corresponding with the Praniza form of the genus 

 Ariceus. 



(ZOOL. CHALL. EXP. PART LXVII. 1887.) XxX 17 



