262 



THE AMERICA N NA TI RA LIST [\'ol. XLI 



still contains much yolk it is less swollen and more elon^^ated while 

 the alxlomen is relatively larijer and it is more useful as its telson 

 hears a fringe of setiie. 



The limbs are changed but little, yet they now hear some setx 

 though these are too small to show nnder low nuignifications, 

 figure (i. 'J'he rostrum is still triangular, hnt sharp, and though it 

 is still l>entdoN\n hctw(>('n tlu^ (wc. it can he M-ni from a .lorsal 

 view an<l aho fro.n a .i<lr n ieu , lignrc (i. ulim- it. i)aM- i. ^i.ihle 

 near the lycs which are now dcci<ledly stalked. 



The first antenna had six segments in its exojxxlite and in its 

 endopodite and the former bore five sense setje, three on the 

 termiiuU and two on the fifth segment. The ear was a wide open 

 cavity with three or four finely barbed seta^ along its external 



The second antenna now had a long spine and a row of 19 or 20 

 plumose seta' on its scale and its filament contained .'U segments 

 some of which seemed to he dividing. 



The mandible edge was now no longer smooth hut ha<l six or 

 seven teeth on its free edge and three above the j>alpus. 



^rhe spines at the lips of the chehe, fig.nv L>(). >too<l at about 

 right angle, and were but slightly recurved, .\long ea-li edge of 



narrow blade, {iuMur L'o' which k'mkI.mI to be cracked or .trialed 

 a<-n... it. lenglh. The.e <-u)ting or ra.pin- .pine, are a .peciali- 



