Zoology. 139 



fi 



1. Manus tertise quarteecjue articulis tertio quart oque 

 instructs, et digit! articulis sequentibus coalitis. An- 

 tennae anticae appendicular, breves. Pedes primi 

 secundique subcheliformes. Phoxuk* (Kroyer). 



SlJBFAM. III. IsiEINJE. 



Pedes sex quatuorve postici subprehensiles. 



A. Antenna secundce subtus primas insitce. 



\ 1. Gammaro similis. Pedes decern postici similes. 



t Antennae sup. appendiculatfe. Iscea (It Edw.). 



2. Pedes tertii sexti septimique crasse cheliformes ; 

 secundi minores; primi quarti quinti minimi, Digiti 

 toti uni-articulatL 



Anisopus (Temple ton). 



/' 



1. Pedes decern postici subcheliformes, similes. Laphystius\ (Kroyer). 



Fam. III. CoROPHIDiE. 



a. Digiti duo 2-articulati. 



1. AntennsB totae flagellis confectre. Caput et seg- 

 mentum proximum in unum coalita. Pedes quarti, 

 quinti, sextique obsoleti ? Cerapodina (M. Edw.) 



2. Antennae flAgellis carentes. Cerapus (Say). 



b. Digiti nulli Q-articulali. 

 * Antenna inferiores flagellis carentes. 



1. Pedes eecundi non subcheliformes. Corophium (Lat.). 



-. Pedes primi secundique in bd tell formes. Podocerus\ (Leach). 



f Antennae quatuor flagellis gracilibufl confectae. 

 1. Pedes primi secundique Bubcheliformea Antenme 



•operioret appendicular. Vneicla% (Say). 



- Pedes primi secundique subcheliformes. Antennae 

 superiores non appendienlatse. Ah/lm (Leach). 



vtutcoua, inanu Iineari- imgue elon^ato ; pes secundi pans brevis, vaiwus. manu quaa- 

 »ta, ungue sublaminari apice setoso. Reliqui decern pedes validi, subcheliformes, 

 eanem ferine longitudine. Epimeramediocris ma-nitudinis ; quartum par in acumen 



mien* productum. 



««erue productum:' 



\ .The Siphonoecetes of Kroyer (Voy. Scand., etc., 1838-1840, pi. 20, fig. 1 ; Tids., 



• K i, 481, 1845) differs from Podneerus onlv in having the posterior legs longer 

 than the fnni. *%-~ jj t i • i • *.■ -. u MM « ^ irti . 



l aan the four preceding. 



rr° aciculart Ped- 5ti 6tique park minutissimi, *ed robust i, recurvau, arucuio 

 Pnino elavato, mgm furcato Pedes 7mi pari* graciles, reeurrafe, artieulo pnmo 



Aannnan, unjr U( . minutissimo furcato. Pedes abdominales lmi, 2di et 3tn pans nata- 



rbomboidali ; pedes in. 5tiqoe paria 



. r MUMW , rAU parls naxaionu, un i instructs lamina terminal" 



& Glaucunoine of Kroyer (ibid, pL H>. fig. 1 ; Tids., N. R, i, 4»1, 1845) has the 

 «anrjs and antennae of Uneiola. The following is the description, p. 501 :— 



Antennm subpediformes • superior* flagello ornatae appendicular! perparvo. 

 ^ minuti, parum distinct/. Jf< dibuhe apex in duos fissus rainoa qui dentibus 



