GENERAL CHARACTERS. 



Table of tlie External Organs of tlie Amphipoda, with the Letters respec- 

 tively attached to each, as emploj^ed throughout the engravings in this work. 



C Cephalon .... Head. 



H to Pereion Body. 



P to Z Pleon Tail. 



(C) a Eyes Eye. 



Superior antennre : 1, first; 2, 

 second ; 3, third joint of pe- 

 duncle; 3", secondary appen- 

 dage ; 4, flagellum. 

 Inferior antenna3: 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. 



e First maxilla. 



(H to 0) h 



(P to Z) }) 

 <I 



Eyes 



Superior antennre: 1, first; 2, 

 second; 3, third joint of pe- 

 duncle; 3", secondary ap- 

 pendage; 4, flagellum. 



Inferior antennaj: 1, first; 2, 

 second ; 3, third ; 4, fourth ; 



5, fifth joint of peduncle ; 



6, flagellum. 

 Mandible; d" mandibular ap- 

 pendage. 



First maxilla, or first siago- 1 

 nopodos * . . . j 



Second maxilla, or second | 

 siagonopodos . . ( 



Maxilhpede, or third siago- ? 

 nopodos . . . S 



1st Gnathoiwdos, represent-"! 

 ing the 2nd maxillipede, > 

 or fourth siagonopodos. J 



2nd Gnathopodos, represent- 1 

 ing the Srd maxillipede, > 

 or fifth siagonopodos . J 



1st Pereiopodos 



2nd do. 



Srd do. 



4th do. 



5th do. 



1st Pleopodos. 



2nd do. ... 



/ Second maxilla. 



g Foot-jaw or pedipalp. 



h 1st 1 



2nd 



}-legs. 



k Srd 



I 4th 



w5th 



n 6th 



7th j 



1) 1st ) 



q 2nd V natatory legs. 



r Srd do r Srd ) 



s 4th do. or 1st Uropodos * 1st \ 



t 5th do. 2nd do. . t 2nd [ caudal appendages. 



V 6th do. Srd do. . v Srd j 



z Telson ... . 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, 

 the type. 



1 Coxa 



We take one of the Gnathopoda as 



1" Branchia 



1'" Plate of incubatory pouch 



2 Basos " . . 



3 Ischium 



4 Meros; 4", inferior angle 



5 Carpus; 5", inferior angle . 



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



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

 margin. 



7 Dactyios ; 7", Unguis . . . . 



Coxa. 



Thigh. 



Knee. 



Metacarpus ; 4", inferior angle. 



Wrist ; 5", inferior angle. 



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

 6'", infei-ior margin ; 6"", supe- 

 rior margin. 



Finger ; 7", Nail. 



* This name is here suggested as the Greik equivalent for the LaHii name of the five pairs 

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

 Cuvier, Sa\igny, &c. The Idvres superieui e and inffirieure of these authors are omitted for 

 the reasons assigned in the following page. — (I. O. W.) 



B 2 



