GENERAL CHARACTERS. 



(C) 



C Ceplialon 



H to Pereion . 

 P to Z Pleon 



TABLE of the External Organs of the Amphipoda, with the Letters respec- 

 tively attached to each, as employed throughout the engravings in this work. 



Head. 



Body. 



Tail. 



Eye. 



Superior antennae : 1, first ; 2, 

 second; 3, third joint of pe- 

 duncle ; 3", secondary appen- 

 dage ; 4, flagellum. 



Inferior antennas : 1, first ; 2, 

 second; 3, third; 4, fourth; 



5, fifth joint of peduncle; 



6, flagellum. 



d Mandible or jaw; d" man- 

 dibular appendage or 

 palpus. 



a Eyes ..... 



b Superior antenna: 1, first; 2, 

 second; 3, third joint of pe- 

 duncle; 3", secondary ap- 

 pendage ; 4, flagellum. 



c Inferior antennae: 1, first; 2, 

 second; 3, third; 4, fourth; 

 5> fifth joint of peduncle ; 

 6, flagellum. 



d Mandible; d" mandibular ap- 

 pendage. 



(II 



Foot-jaw or pedipalp. 



legs. 



natatory legs. 



caudal appendages. 



(P to Z) p 



2nd do. .... 



3rd do 



4th do. or 1st Uropodos 

 5th do. 2nd do. 



6th do. 3rd do. 



z Terminal joint or middle 

 tail-piece. 



The corresponding joints of all the limbs are marked with the same number, 

 and bear the same names throughout. We take one of the Gnathopoda as 

 the type. 



1 Coxa Coxa. 



I// Branchia 



1"' Plate of incubatory pouch 



2 Basos 



3 Ischium 



4 Meros; 4", inferior angle . 



5 Carpus; 5", inferior angle . 



Thigh. 



Knee. 



Metacarpus ; 4", inferior angle. 



Wrist ; 5", inferior angle. 



6 Propodos ; 6',palma ; 6", inferior angle ; Hand; 6', palm ; 6", inferior angle ; 

 '" superior 6'", inferior margin ; 6"", supe- 



6'", inferior margin; 6 

 margin. 

 7 Dactylos; 7", Unguis . 



nor margin. 

 Finger ; 7", Nail. 



* This name is here suggested as the Greek equivalent for the Latin name of the five pairs 

 of appendages succeeding the mandibles, which were collectively termed pates-mdchoires by 

 Cuvier, Savigny, &c. The 16vres superieure and infe"rieure of these authors are omitted for 

 the reasons assigned in the following page. (I. 0. W.) 



B 2 



