ANNULOSA : CRUSTACEA. 



223 



" endopodite." In this particular segment, the exopodite and 

 endopodite are greatly expanded, so as to form powerful pad- 

 dles, and the exopodite is divided into two by a transverse 

 joint. In the succeeding somites of the abdomen with the 



Fig. 83. Morphology of Lobster, i. Lobster with all the appendages, except the 

 terminal swimmerets, removed, and the abdominal somites separated from one 

 another, ca Carapace; t Telson. 2. The third abdominal somite separated. / 

 Tergum ; .$ Sternum ; p Pleiiron ; a Protopodite ; b Exopodite ; c Endopodite 

 One of the last pair of foot-jaws or maxillipedes. e Epipodite ; g Gill : the c 

 letters as before. 



other 



exception of the first, in which there is some modification 

 the appendages are in the form of swimmerets, essentially the 

 same as those attached to the penultimate segment, and differ- 



