178 



HANDBOOK OF INVERTEBRATE ZOOLOGY. 



III. The Appendages. 



Having removed the abdomen, carefully disarticulate 

 its appendages, and the five pairs of pereiopods, and lay 

 them aside in order, for subsequent examination. Raise 

 up and disarticulate the third maxillipeds, and carefully 

 remove them, with their long flabella. 



a. Under thesfe notice the second and first pairs of max- 

 illipeds, much like the third pair, but more soft and mem- 

 braneous. Disarticulate the second maxilliped, and re- 

 moving it for examination, notice that it consists, like the 

 third maxilliped, of: 



(i.) A two-jointed proto- 

 podite (Fig. 93, p), which 

 carries two gills (^), and an 

 epipodite, or flabellum (f). 



FIG. 93. Outer surface of left 

 second maxilliped; natural size. 

 (Drawn from nature by W. K. 

 Brooks. ) 



y, (j. Gills. Other letters as in 

 Fig. 92. 



(ii). A long, slender exopodite (ex), much like that of 

 the third maxilliped. 



(iii.) A five-jointed endopodite (en), which is not flat- 

 tened to form an operculum, as in the third pair. 



b. Remove the first maxillipeds, and examining them, 

 notice that, while they have a close resemblance to the 

 others, they are soft and foliaceous (Fig. 94), and with- 

 out gills. The flabellum (/) and exopodite (ex) are 

 much like those of the second and third maxillipeds, but 

 the two joints of the protopodite, the basipodite (b) and the 

 coxopodite (ex) are greatly enlarged to form two hairy 

 jaws, on each side, while the endopodite (en) is unjointed, 

 soft, membraneous, and fused with the exopodite. 



FIG. 93. 



