316 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



podite. It is membranous, the proximal half being 

 flattened laterally and the distal half dorso-ventrally. 

 The exo podite (ex.) is long and slender and consist's of a 

 long proximal segment, which is as long as the endo- 

 podite, and a distal many-jointed tlagelluin (flag.) 

 which in its natural position projects inwards at right 

 angles to the proximal segment. During life this 

 flagellum is exceedingly active. From the outer side of 

 the protopodite arises the long flabellum (flab.) (or 

 epipodite). This is a long narrow membranous plate which 

 passes back into the branchial chamber above the gills. 

 The proximal portion of the flabellum is broad and leaf- 

 like. 



The Second Maxillipede (PI. II, fig. 10) has the 

 exopodite and flabellum in the same position as in the 

 previous appendage. The flabellum {flab.), however, is 

 much shorter than that of the first maxillipede, and lies 

 along the upper portion of the thoracic epimera and below 

 the gills. The protopodite is much reduced, but the 

 proximal coxopodite* (C.) and the distal basipodite (B.) 

 can still be made out. The endopodite is comparatively 

 larger than the same part in the first maxillipede. It 

 arises from the basipoclite and is divided into five 

 movable segments. The first or proximal segment — the 

 ischio podite (I.) is small. The second segment or 

 rneropodite (M .) is the longest, and equal in length to the 

 other four segments. The three distal segments are 

 small, and between the second and third segment the 

 endopodite turns inwards, the distal segments being at 

 right angles to the rneropodite. The names of the third, 

 fourth and fifth segments are carpopodite (C. 1 ), propo- 



* The following abbreviations are sometimes used '.—coxa = 

 coxopodite; basis = basipodite ; ischium = isohiopodite ; mere* = 

 rneropodite ; carpos = carpopodite ; propos = propodite ; dactylos = 

 dactylopodite. 



