REPORT ON THE AMPHIPODA. 255 



In " Familia II. Gammaridse. Mandihiilx palpigsrse. C'oijms saepius compressum. Anfennx 

 flagello confectse, non pediformes. SfijU rawlaJe^ duo postici sive longi sive breves. 

 Animalia salfafuria vel nafafuria," he gives the following arrangement, "Subfamilia I. 

 Lysianassinaj. Antennx jjiimx basin erassK. Epiinera grandia. Pedes sex postici non 

 prehensiles," including Lysianasaa BrcailieJifn's, Uristes ffi'jas, Sfenia Mafjellanira. " Sub- 

 familia II. Gammarinre. Aniennx prinix'basmiQ\v\i(i&. EpimerarAve grandia, sive angusta. 

 Pedes sex postici non prehensiles. Genus I. Gammarus. Pedes primi secundique subcheli- 

 formes, digito uni-articulato, reliqui non prehensiles, sex posticis similibus. Aniemix 

 secimdae sub primas insitie, jirimfe apijendiculatre," with the species described under various 

 sections and subsections, of two main divisions, "I. jNIanus pedum 2dorum pollice elongate 

 non armata," containing the species, asper, Suluensis, alhidui<, liii-sutirornis, eiidiisitiu^, 

 tenuis, furcicornis, tenelhis, nrientalis; "II. Manus una paris secuudi validissime 

 cheliformis, pollice valde elongato; altera parvula. {Gen. Maira, LeacJiii.)," containing 

 Gammarus {Mxra) quadrimanus, Gammarus (Mxra) va/idus, Gammarus {Mxra) setipes, 

 Gammarus (ilxra) pilusus. ''Genus II. Amphitoc. Gammaro affinis. Antennx 

 superiores non appendiculatce. A. Antennas superiores longiores," including in this 

 division, under sections and subsections, species named peculans, fissicauda, puhesrens, 

 Amphitoe {Melita) inxquistylis. Peruviana, tennicornis, Indica, riihella, fucorum, 

 Tdur/ensis, peregrina, lirevipes, and under " B. Antennaj superiores breviores. (Genus 

 Iphimedia, Rathke.)," Ipliimedia simple.i- and " Iphimedia (Acanfhosoma, Owen) nod,i.--a." 

 " Genus III. OJdicerus. (Kroyei-). Amphitoe pedes 4 anticos membraque buccalia affinis. 

 Pedes septimi valde elongati,^tenues, fere flliformes. Epimera mediocria," with the species 

 CE'Hcerus Novi-Zealandix. " Genus IV. Erichthonius? {M. Edirards.). Antennx 

 elongataa. 'Pedes primi plus minusve chelifornies, secundi valde cheliformes, digito 

 biarticulato, pollice promincnte. Epimera sat angusta aut latiuscula. Cauda subsaltatoria. 



" Erichthonii gressorii (cauda non saltatoria), jNI. Edwardsio auctoritate, et epimera carentes. 

 Forsan genus hie descrijjtum Erichthonio discrepat et novum. Hoc credente, genus 

 Pyctilus (a irvKT-q';, pugil) in manuscriptis auctore institutum est," with the species 

 Erichthonius (Pyctilus?) macrodactylus a,ud Erichthonius {Pyctilus?) ptugnax. 



" Familia III. Corophida;. Corpus phis minusve depressum, lineare, abdomine recto, articulos 

 normali, epimeris angustissimis vel obsoletis. Mandiliulx palpigeros. Antennx pediformes. 

 Animalia gressoria. Genus 1. Corophium. Pedes secundi non subcheliformes digito 

 nullo 2-articulato. Antennx 2da3 flagellis carentes," has only the obscure species Corophium 

 quadriceps, described from a specimen perhaps not adult. " Genus II. Clydonia. {Dana). 

 Corpus elongatum, paulo depressum. Abdomen 6-7 articulatum. Antennae quatuor; 

 dua3 elongataj, stylifornies, recta; et rigidas, articulo basali brevi, reliqua parte longissimi^ 

 subulata obsolete multi-articulatu. Pedes tenues, 6 postici longv filiformes, quintis 

 longissimis," has the species Clydonia gracilis and Clydonia longi-pes, " C. gracili, similis." 

 Bovallius, 1886, identifies this genus with 2'yro, Milne-Edwards. 



" Familia IV. Icilidffi. Corpus valde compressum, latum, vix lineare, abdomine articulos 

 normali, valde inflexo. Pedes plerumque late expansi instar Aranei. Ardennx quatuor 

 flagellis confectaj, non pediformes. Animalia gressoria. Gemis Icilius. Antennx elongata;, 

 secundfE longiores. Pedes non prehensiles, toti vergiformes, apicem unguiculati. Slyli 

 raudales sex furcati." This genus receives the single species, Icilius oralis, of which the 

 specific name was afterwards changed without notice into the better Latin elhpticus. In 

 regard to his Amphitoe hrevix^es, in which the second gnathopod is large in the male but 

 small in the female, Dana adds to his description the remark, " Jlicrocheli, generi non 

 vero, ut mihi videtur, femina A. hn ripedix forsan pertinet." 



