REPORT ON THE AMPHIPODA. 175 



des Laemipodes et se distingue facilement des aiitres Edrioplithalraes par I'etat rudiiiicntiiiiu 

 de I'abdomen qui est reduit ii un simple tubercule. Elle se subdivise en deux petites 

 families naturelles : les Caprelloidieus ou Lsemipodes filiformes et les Cyamoidiens on 

 Lffimipodes ovalaires." In the first of these subdivisions, Leptomera, with the species rubra 

 and pedata, still holds the place which belongs to Proto ventricosa, 0. F. M., Proton pcdaturn, 

 being added from Desmarest to the synonymy of Leptomera pedata. Caprella has the 

 species seolopendroides of Pallas, and pjhasma of Montagu, with references to additional 

 species described by Latreille, Leach, Desmarest and Templeton. Under Cijamus, with the 

 "Espece. Cyame de la baleine. Ci/amus ceti," Cijamus ovalis, Roussel de Vauzeme is also 

 given, seemingly as a synonym. Latreille's unpublished East Indian species is mentioned, 

 and the observation made that, " suivant M. Roussel de Yauzcme, on aurait confondu sous 

 le nom de Cyamus ceti, trois especes de Cyames qui vivent toutes sur la baleine ; mais ce 

 naturalists ne parait pas avoir fait assez d'attention aux changemens de forme que I'age 

 anu-ne chez ces animaux. (Voyez Ann. des Sc. nat. 2^ serie. 1. 2.) " 



On the Amphipods, pages 299-317, a note points out that there are six pairs of abdominal feet, 

 instead of five as stated in the text, and where Lamarck says of the Amphipods, "c'est 

 toujours sur le cute qu'ils se posent," a note observes that " plusieurs amphipodes qui ne 

 lui etaient pas connus, n'out pas le corps comprime et nagent dans la position ordinaire," 

 The editor observes that the Amphipods form two natural families : — 



" 1° Les Crevettiniens qui ont le corps grCle et allonge ; la tete petite et les pattes-machoires 

 recouvrant toute la bouche et formant une espece de levre inferieure terminee par quatre 

 grandes lames cornees et deux longues tiges palpiformes et qui ne sont pas parasites. 



" Genres Crevette, Talitre, Corophie, etc. 



" 2" Les Hyperiniens qui sont plus ou muins parasites et ont en general le corps gros et bombe ; la 

 tete forte et , ies pattes-machoires tres-petites, recouvrant seulement la base des autres 

 appendices buccaux, terminees par trois lames cornees et depourvues de tiges palpiformes ou 

 n'en presentent que des vestiges. 



"Genres Hyperee, Phronime, Tiphis (p. 285), etc." 



On the species of Plironima, he remarks that they have seven thoracic rings, each with a pair of 

 ■ feet, the fifth of which ends in a didactyle hand; that they have also seven abdominal rings, 

 the fifth and sixth more or less coalescent, and the seventh laminar. He thinks that 

 PJiro7uma atlantira, Guerin, may be only the young of Plironima sedentaria. Hyperia, 

 Latreille, is given with three species, latreilUi, cyanex and pelagica. The last of these he 

 identifies with Say's Lanceola ppJaf/ira; the first with Hiella urliirpiii, Straus, and also with 

 " Onisais medusarum? Othon Fabricius," and " Marflw, Strom, Sondmor," both which he 

 subsequently transferred to Metoeeus Medumrum, Krdyer. "Hyperia Suerii" is likewise 

 here a synonym of LatreilUi, but later on under the name Lesueurii, Milne-Edwards speaks 

 of it as a distinct species. "Phorcus Reynaudi," M.-Hdw.; "Lesfrigo7i Fal/rei," M.-Edvc; 

 Daira Gabertii, M.-Edw.; Themisto GaucKchaicdii, Gui5rin ; Dactylocera, Latreille, and the 

 species Dactylocera Nicxensis, M.-Edw.; Hieraconyx abhrematas, Guerin; Primiio macropia, 

 Guerin; Aiicliylomera Blosserittii, M.-Edw.; Anchylomera Hunteri, M.-Edw.; Pronoe capito, 

 Guerin ; Oxycephalus piseatoritts, M.-Edw.; Oxyceplialus oceanicus, Guerin ; and Vihilia 

 Pei-onii, M.-Edw.; have met with remark in earlier notes. On Dactylocera the observation is 

 made that Phrosina wmilunata, Risso, "jiarait appartenir anssi h, ce genre, comme I'a tres 

 bien remarque Latreille (Regne anim. t. 4. p. 117)." On Vihilia the remark is made that 

 Templeton's Thaumalea depilis " parait devoir appartenir a ce genre." 



To the account of the genus Gammarus is added the note, "les Crevettes forment le type d'une 

 tribu particuliere de la famille des Crevettinions que nous avons designes sous le nom des 

 Crevettiiiiens sauteurs, et que Ton reconnait facilement au mode d'organisation de la partie 

 postfcrieure de I'abdomen. Ce groupe renferme anssi les Talitres et quelques genres 



