Amphilochidae, Amphilochus 149 



Synopsis of genera: 



, iSide-plates 3 and 4, contiguous margins not 

 ) exactly fitting — 2. 



j Side-plates 3 and 4 (Fig. 40), contiguous 

 ' margins exactly fitting — 5. 



j ]\randible, molar small or obsolete — 3. 



\ Mandible, molar large and prominent — 4. 



I j\Iaxilla 2 normal 1. Gen. Amphilochus . . . p. 149 



) Maxiila 2 degraded 2. Gen. Amphiloehoides . p. 152 



( Maxilla 1, palp 2-jointed 3. Gen. Gitanopsis . . . . p. 153 



\ Maxilla 1, palp 1-jointed 4. Gen. Gitana p. 155 



. Side-plates 1 — 4 combined in forming lateral 



I shields 5. Gen. Tetradeion . . . . p. 157 



\ Side-plates 1 and 2 (Fig. 40) not foi-ming 

 l const 



constituents of lateral shields — 6. 



I Mandible, molar wanting 6. Gen. Cyproidea . . . . p. 157 



) Mandible, molar developed — 7. 



) Uropod 2 not reaching so far as uropod 3 7. Gen. Stegoplax , . . . p. 158 

 \ Uropod 2 reaching at least as far as uropod 3 — 8. 



, Gnathopod 1, 4th Joint not greatly or acutely 



) produced 8. (Jen. Peltocoxa p. 159 



) Gnathopod 1, 4th Joint greatly and acutely 



l produced 9. Gen. Paracyproidea . . p. 160 



1. Gen. Amphilochus Bäte 



1862 Amphilochus (Sp. un.: A. manudens). Bäte, Cat. Amphip. Brit. Mus., p. 107 ] 

 1888 A., T. Stebbing in: ßep. Voy. Challenger, v.29 p.743 | 1892 A., G. 0. Sars, Crust. 

 Norway, v.l p. 215 | 1893 A., A. DellaValle in: F. Fl. Neapel, v. 20 p. 593 | 1876 Calli- 

 merus (Sp. un. : C. acudigitatä), T. Stebbing in: Ann. nat. Hist., ser. 4 v. 18 p. 445. 



Body rather stout. Rostrum curved acuminate, lateral angles of head 

 projecting, postero-antennal corners obsolete. Side-plate 1 small, obscured, 

 2*^ — 4**^ large and deep, 4*^ rather strongly emargiuate behind, bind lobe of 

 5*^ the deeper. Antennae small, peduncles rather long, flagella short. 

 Antenna 1 larger in ö than in 9 , without accessory flagellum. Epistome rounded 

 in front. Upper lip distally incised, low er lip without inner lobes. Mandible, 

 cutting edge narrow, denticulate, accessory plate only on left mandible, 

 molar feeble, 3^ Joint of palp rather long. Maxilla 1, inner plate very 

 small, outer probably with 7 spines, palp 2-jointed. Maxilla 2, inner plate 

 broader than outer. Maxillipeds, inner plates elongate, outer of moderate size, 

 palp long, 4*^^ Joint short. Gnathopods 1 and 2 subchelate, palm distinct, 5*^ 

 Joint more or less produced. finger long; gnathopod 2 the larger. Peraeo- 

 pods 1 — 5 slender, subequal; peraeopods 3 — 5, 2^ Joint expanded. Uropod 2, 

 rami unequal, uropod 3, peduncle longer than the subequal rami. Telson 

 conically tapering, entire. 



5 species accepted, 3 doubtful. 



Synopsis of accepted species: 



, Gnathopod 1, front margin of 6th joint acutely 



^ ) produced 1. A. manudens . . p. 150 



^ Gnathopod 1, front margin of ß^^ Joint not acutely 

 ' produced — 2. 



