DEVELOPMENT OF EUPHAUSIA SUPERB A 



Table XX (cont.) 



59 



Note 24. The antennal inner ramus consists of two basal segments and a three-segmented flagellum. 

 Within the integument of the flagellum can be distinguished a much greater number of segments— 

 si.x or eight in number at least. 



five, five to three and three to one, but that, as might be expected in arthropods whose 

 development is so undefined, by no means all the larvae conform to this scheme. 



PosTERO-LATERAL TELSON SPINES. In none of the larvae in this sample is the number 

 of postero-lateral spines reduced from three to two as eventually happens. In the seven- 

 spined larvae the state of development of the innermost postero-lateral is shown in 



8-2 



