REPORT ON THE AMPHIPODA. 123 



the species grossimana. "\^Tience he derives the names Boscia and Mulleria he does not 

 explain. He adds in a note that probably Gammarus crasdmanus, Viviani, belongs to 

 the genus Mxra. 



" Suhdividon II. Pieds des deux ■premVeres paires monodacfyles et semhJables dans les deux sexes." 

 In this are included three genera, "Crevbttb (Gammarus, Fabr., Latr., Lamck., Leach ; 

 Squilla, Degeer; Cancer, Linn.; Carcinus, Latr.)," with the species Gammarus pule.x, Fabr., 

 Latr.; Gammarus marinus. Leach; Gammarus locusta, Leach; and Gammarus camj}ylops, 

 Leach. Among the synonyms of Gammarus pidex may be mentioned, " Squilla fluviatilis, 

 Merret, Pin., pag. 192." Of Gaymnarus locusta, ho says, " M. Surriray, du Havre, a 

 remarqu^ qu'elle est phosphorescente." The next genus, Amphitlioe, has the species rubricata 

 of Tklontagu and caneellus of Pallas. The third genus is Pherusa, with the species /uce'coZa. 



" V" Division. Antennes eomposees de quatre articles; les inferieures etant les plus lonrjues et 

 pediformes ; le.i quatre pieds anterieurs monodadyles. 



" Subdivision I. Pieds de la seconde paire pourvus d'une grande nmin ; antennes inferieures de 

 bienpeu plus tongues que les superieures." Podocerus with the species variegatus, Jassa 

 with the species pulchella a,nd pelagica, are the genera included, Gorophium, Latr., being 

 given as a synonym to each. 



" Subdivision II. Pieds de la seconde piaire n'ayant pas la main dilatee ; antennes inferieures 

 Men plus tongues que les superieures." Corophiurn, with the species longicorne and its 

 accustomed synonyms, stands here alone. 



" Vie Division. Les quatre antennes tre^-grandes et fortes, jrresque aussi tongues les unes que les 

 autres ; les superieures formees de quatre articles, et les inferieures on laterales, de cinq." 

 Cerapus, Say, with the type species tubularis, occupies this division. 



In a note Desmarest here gives an account of several genera as probably belonging to the 

 Amphipoda, though from want of figures and sufficient description remaining doubtful. 

 These are Lepidactylis, Say, with the species dytiscus ; Laneeola, Say, with the species 

 pelagica ; Sperchius, Rafinesque, with the species lucidus, and a complaint that Rafinesque 

 should have chosen a name for his genus so near to Sperchseus employed by Fabricius among 

 the Coleoptera ; Lepleurus, Rafinesque, with the species rivularis ; Pisitoe, Rafinesque, with 

 the species bispinosa and Isevifrons. " Enfin, un genre nomm^ Aerope, appartenant aussi k 

 I'ordre des amphipodes, a ite crie par M. Leach ; mais il m'est inconnu, et M. Savigny a figur6 

 (dans ses M6m. sur les anim. sans vert., 1" part., 1" fasc), les parties de la bouche des deux 

 autres, qu'il nomme Ctmadusa et Ltcesta. Ce dernier me paroit trfes voisin du genre 

 Maera de M. Leach." 



The fourth order, Lxmodipoda, Latr., is distributed as follows: — 



" 1'^ Section. Corps trhs-etroit et lineaire ; des yeux composes dtues en arrihre des antennes 

 mperieures; point cVyeux lisses ; antennes stiperieures ayant le dernier article ausd 

 long que fous les autres ensemble; les inferieures un peu comprimces ; pieds en nombre 

 variable ; main de eeux de la seconde paire souvent dentee en dedans." To this section 

 he assigns Lepfomera, Latr., Lamck., with Squilla ventricosa,. Miiller, for type, observing 

 that Latreille founded this genus only upon published figures, and referred to it, besides 

 Miiller's species, which has no vesicular appendages figured at the bases of the legs, 

 also Slabber's species, " qui a un appendice en forme de lobe, a tous les pieds, les 

 deux premiers except^s," and Montagu's Cancer pedafus, "qui en a tous les pieds 

 pourvus, moins ceux de la pr&miere et des trois derniferes paires." To the same Section he 

 assigns "Proton (Proto, Leach, Latr.; Squilla, MuUer ; Lepfomera, Lamck). Dix pieds 

 disposes dans une s6rie continue depuis la tete jusqu'au quatrifeme anneau inclusivement, le 

 corps etant termini par deux ou trois articles, qui ferment une espfece de queue," etc., with 

 the tyjje species, " Le Proton pediairb. Proton pedatum, Nob.; Squilla pedata de Muller." 

 Though Desmarest says ho had himseK found it in abundance at Havre, there can be no 



