133 



M 



& 



ist Walking Legs 



2nd 



3rd 



4 th 



r ist Swimmerets. 



o v 



2nd Swimmerets. 



3rd, 4th, and 5th 

 Swimmerets 



6th Swimmerets. 



Same as chelae, but smaller. 

 Each bears a gill (podo- 

 branch). 



... Same as 1st pair. Each bears 

 a gill (podobranch). The 

 female has an opening on, 

 the base of each leg (female 

 genital apertures). 



... Not chelate. Each bears a 

 gill (podobranch). 



Not chelate. Each bears a 

 gill (podobranch). The 

 male has an opening on 

 the base of each leg (male 

 genital apertures). 



Exopodite absent. Protopodite and 

 endopodite fused and rolled in, 

 male, so that the two appen- 

 dages form " tubes " for con- 

 veying the seminal fluid to the- 

 female. These Swimmerets are- 

 rudimentary in the female. 



Same as first pair in male. In the- 

 female the protopodite two- 

 jointed, and bearing a small: 

 filamentous endopodite and exo- 

 podite. Aid in swimming, and 

 carry eggs. 



Protopodite two-jointed, and bear- 

 ing a small filamentous endo- 

 podite and exopodite (in both 

 sexes). Aid in swimming, and 

 carry eggs in female. 



Protopodite stout. Endopodite a 

 broad plate ; the exopodite- 

 similar and hinged. These swim- 

 merets form, with the telson,, 

 the swimming paddle. 



