KNIGHT: DEVELOPMENT OF EUPHAUSIA GIBBOIDES 



larvae described and confirms their identification. 

 The juveniles examined ranged from 5.3 to 

 8.2 mm in total length and a dorsal spine ap- 

 peared on the 3rd segment of the abdomen at 

 a length of 6.8 mm. A 3-lobed eye was found 

 in a 7.2-mm individual. At 7.0 mm, the con- 

 striction between the upper and middle lobes of 

 the eye may disappear; the lower large lobe re- 

 mains well defined and, although the pigment 



Table 5. — Measurements of nauplius and metanauplius stages. 



still appears darker in the lateral position of the 

 middle lobe, the eye becomes increasingly 2- 

 lobed in appearance. The antennule may have a 

 small lappet in 6.3-mm individuals, but the 

 pointed triangular tip was not seen in animals 

 less than 7.0 mm in length, and then it was not 

 always directed outward as in the adult. The lobe 

 and keel of the 2nd and 3rd antennular segments 

 respectively were not developed. A rostral spine 

 may be missing or very small in the early 



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