144 THE VOYAGE OF H.M.S. CHALLENGEE. 



In the Hist. nat. des Crustac^s, Milne-Edwards gives a description of his " Ampliitoe Prevostii" 

 differing very little from his account of Amphitoe pontica, as he calls the Hyale pontica of 

 Kathke. Eathke in his Norwegian Fauna, p. 81, names a species, " AmpJiitJioe Prevostii, 

 M. Edwards ?," which he thought had no telson, and was thereby distinguished from his 

 own Crimean species Hyale pontica. But the want of a telson in such an Amphipod is 

 obviously only an accidental defect. Eathke subsequently, p. 264«, without giving any reasons, 

 makes his Norwegian specimen a separate species as " Amp>hithoe Nilssonii." This species 

 Spence Bate in the British Museum Catalogue, p. 38, accepts under the name " Allor- 

 ckestes Nilssonii," with references to Eathke, while Amphitoe Prevostii, Milne-Edwards, is 

 made a synonym of Nicea prevostii^aX p. 53. Milne-Edwards' species will stand as Hyale 

 prevostii whether Hyale nilssonii be a synonym of it or not. Hyale pontica is a distinct 

 species. 



1831. Lateeille, p. a. 



Cours d'Entomologie, ou de I'laistoire naturelle des crustaces, des arachnides, 

 des myriapodes et des insectes. Ouvrage accompagne d'un atlas. A Paris, 1831. 



The class of Crustacea is discussed from js. 311 to p. 469. The Lsemod ipoda are here the third 

 order, without alteration within the order itself. The genus Neinpredia, Latreille, evidently 

 founded on an imperfect specimen of a Proto, is still retained. 



The Amphipoda are here the fourth order. "Envisages sous la consideration des habitudes," he 

 says, " les amphipodes peuvent etre partages en trois sections, les sauteurs, les marcheurs et 

 les parasites. Les premiers composeront la famille des crevettines, les seconds celle des 

 podoc(5rides, et la derniere celle des hyperines de M. Milne-Edwards. Les deux premieres, 

 composees d' amphipodes errans ou vagabonds, se distinguent de celle-ci par les caraotferes 

 suivans : pieds-machoires (ceux de la premifere paire, et presentant I'apparence d'une levre 

 inf^rieure recouvrant les autres parties de la bouche) pluriarticuMs, et r^unis seulement h 

 leur naissance ; deux paires de lobes triangulaires, et dont les deux superieurs plus grands, 

 mais n'atteignant pas I'extremit^ de ces organes dans leur entredeux, et annexfe a leur 

 cote interne." 



In the first family, Cbevettines (Gammarin^), while waiting for the new distribution by Milne- 

 Edwards, Latreille forms two sections, one containing Leucothoe (leucothoe) Leach ; the 

 other containing Ceevette (gammarus) ; Pherdse (pherusa), Leach, (including in this 

 latter genus " plusieurs autres de ce naturaliste, tela que ceux d'ampithoe, de mcera, meliia 

 et dexarnine") ; Talitre (talitnis), and Orchestie (orchestia). 



In the second family, Podocerides (Podocerides), he mentions Gorophium, with M. d'Orbigny's 

 account of its habits, Podocerus, Jassa, Cerapus, Atylus. 



In his account of the third family, Htp^rines (Hi'PERiNiE), he alludes to the genera " lestrigon 

 et daira de M. Edwards." He also says, " Le genre DACTTLOcfeEB (dactylocera, Latr.; 

 vihilia, Edw.) se distingue de tous les suivans par plusieurs caracteres. La tete est de 

 grosseur ordinaire ou moyenne. Au-devant de la fausse Ifevre inf^rieure, h. I'origine de ses 

 lobes latcraux, est de chaque cote un petit corps palpiforme ; les antennes superieures sont 

 tres courtes et terminees par un grand article lameUiforme. M. Edwards exposera les 

 autres caractferes de ce genre dans sa Monographie des amphipodes: j'y rapporterai la 

 phrosine en croissant de MM. Eisso et Desmarest." He then gives an account of Typhis, 

 Phro7iima, Themisto, in regard to the latter explaining the origin of his term decentpMes. 

 The first four feet being small and closely appHed to the mouth, he regarded them rather as 

 mouth-organs than as legs in Tliemisto, in his own genus Hyperia, and in that which in 

 the new edition of Cuvier's Regne animal, he had called Phrosine, with phrosine gros-ail of 



