184 



THE VOYAGE OF H.M.S. CHALLENGER. 



of Deg^er, while Gammarus roeselii, Gervais, is entered without reference to Eoesel. The 

 genera assigned to the first family, Crevettines, are Orchestia, Talitrus, Lijsianassa, Gammarun 

 Ampliithoe, PhJias, " Is<xa," Leucothoe. To the second family, Podoc^rides, are assigned 

 Erichtonius, Atylus, Unciola, Cei'apus, Podocerus, CoropMum. On " Corophia longicorne" 

 d'Orbigny's observations are as usual quoted. To tlie third family, Hyp^rines, are assigned 

 the genera, " Vibilia, Hyperia, Phornis, Lestrigon, Daira, Themisto, Hieraconyx, Dacfylo- 

 cerus, Anchylomera, Phronima, Primno, TijjJiu, Pronoe, Oxycephalies." The descriptions of 

 Gu6rin's genera are given with great fulness. To each of the species " Vibilia Peronii," 

 M.-Edw., " Phorcus Reynaudii," M.-Edw., Lestrigon Fahrei" M.-Edw., " Daira Gabertii," 

 M.-Edw., the remark is attached, " Cette esp^ce est encore in^dite," as though the species 

 were still iindescribed, but it is obvious that, wlien a new genus is established for a single 

 species, the characters of the genus are for the time tliose of the species also. Part of 

 Plate 17 and the whole of Plate 18 are devoted to figures of Amphipoda, but the figures are 

 not original. The names of Cei'apus tuhularis and Corophium longicorne are interchanged 

 on Plate 18. 



1840. Milne-Edwards, Henri. 



Histoirc naturelle des Crustaces, comprenant ranatomie, la j)hysiologie et hi 



classification cle ces animaux. Tome troisieme. Ouvrage accompagne de planches. 



Paris, 1840. 



This volume opens with the Edriophthalmes of Leacli as second legion of the subclass " Crustaces 

 niaxilles." To mark them off from other Crustacea, MQne-Edwards points out that they 

 have the body divided into three very distinct parts, head, thorax, and abdomen, the rings 

 of the two latter being almost always distinct and free to move ; they have no carapace, no 

 movable peduncle to the eyes, although like the Podophthalma they have the mouth armed 

 witli mandibles and maxilla;, and the thoracic limbs all or almost all in the form of ambulatory 

 feet. They do not, however, breathe by branchias properly so called but by the help of a 

 portion of the locomotive limbs, wholly or in part modified for the purpose ; " tantot c'est 

 I'appendice llabelliforme des pates thoraciques qui aflecte la forme d'une grande vesicule 

 membraneuse h, texture delicate, et qui devient ainsi propre k servir d'instrument a la respira- 

 tion." In the small number of species in which the inner structure is known, " le foie est 

 remplac6 par trois paires de canaux biliaires, le coeur a la forme d'un vaisseau dorsal situ6 

 tantot dans le thorax, tantot dans I'abdomen, et los organes gdnitaux se rapprochent, par 

 leur structure, de ce qui se voit chez les Insectes." They form, he says, three natural classes 

 thus distinguished : — 



Edriophthalmes 

 ay ant, 



Des vesicules branchiales sous le thorax. 

 Membres abdominauxdes cinqpremieres 

 paires heteromorphes et serx'ant a la 

 locomotion. ..... 



I'abdomen bien d^veloppe 



et pourvu de cinq ou six ■{ Presque jamais 

 paires de membres. 



de v^siculos branchiales 

 sous le thorax. Membres abdominaux 

 des cinq premieres paires a jieu pres de 

 nieme forme, impropres k la locomotion, 

 et paraissant remplir les fonctions de 

 branchies. ...... 



I'abdomen rudimentaire dont la forme est celle d'un petit tubercle sans 

 appendices bien distincts. Des v(^sicules branchiales suspendues au 

 thorax, ............ 



Amphipodes. 



Isopodes. 



LcPmodipodes. 



