DEVELOPMENT OF EUPHAUSIA SUPERBA 



57 



Note 18. There are six terminal telson spines and there will be five in the next stage. There is no projection 

 into the spine on the extreme left, so that in the existing stage it is the outermost spine on the right 

 which is probably wanting (cf. Note 16 supra). 



Note 19. Within the integument of the telson four quite well-defined spines are visible. There is no spine 

 projection into the existing spine on the extreme left. 



Note 20. There is asymmetry in the development of the appendages of this larva. The left mandibular palp 

 has one large seta, the right two setae on the terminal segment. The left antenna is more primitive 

 than the right, the outer ramus is not scale-like and the inner ramus is very indistinctly divided 

 into two, whereas the left antenna has a definite scale and a distinctly two-segmented flagellum. 



