388 



SCHIZOPODA. 



The adult characters are very gradually acquired in a series of suc- 

 cessive moults ; the later development of Euphausia resembling in this 



Fin. 213. LAKVJE OF EUPHAUSIA. (After Claus.) From the side. 



A. Protozosea larva. B. Zoaea larva. 



HI;/, and mx". maxillse 1 and 2; mxp^. maxilliped 1. 



respect that of the Phyllopods. On the other hand Euphausia differs from 

 that group in the fact that the abdominal (caiidal) and thoracic appendages 

 develop as two independent series from before backwards, of which the 

 abdominal series is the earliest to attain maturity. . 



This is shewn in the following table, compiled from Glaus' observations. 



All the appendages following the second pair of maxillae are biramous, 

 and the first eight of the.se bear branched gills as their epipodites. It is 



