II 



APPENDAGES OF PHVLLOPODA 



excluding the gnathobase) being very mobile and attached to the 

 main stem by a definite joint. On the outer side are two pro- 

 cesses ; a proximal " bract," a flat plate with crenate edges, partly 

 divided by a constriction into two, and a distal process, cylindrical 

 and vascular, called by Sars and others the " epipodite." In 

 other Branchipodidae we have essentially the same condition, 

 except that the fifth endite often becomes much larger than in 

 Artemia, throwing the terminal endite well over to the outer 



A B 



Fi<:. S. A, Thoracic limb of ('//ir<t<->-/ihit?itx iti'it/i/nunix ; B, i>ivlic]i-.ilr thoraci' 1 liinli 

 of male Esthcria. //, (inathobase ; 1-6, the moiv .li~t.il endites. 



of the limb; such a shift as this, cont iuucd farther, might 

 well lead to the condition found in the Limnadiidae, or Apodidae 

 when; the loin; which seems to represent the terminal endite of 

 Artemia is entirely on the outer border of the limb, fonuin- 

 what most writers have called the exopodite (Lankester's 

 " flabellum "). 1 In the two List -named f;iniilics the basal exile 

 or bract of the Branchipodidae does not appear to be represented. 

 The limbs of the Apodidae ;ne remarkable in t\\o ways; 

 those in front of the genital opening very constantly leu pairs) 



1 The nomenclature liero adopted is not iliat of 



