DEVELOPMENT OF EUPHAUSIA SUPERB A 97 



postero-lateral spines (Fig. 25 b). There is only one spine posteriorly, and with this con- 

 dition the posterior border is reduced so that the lateral borders approximate to each 

 other and are in alignment with the lateral borders of the median spine. Three postero- 



Table XXXVII. Occurrence of Sixth Fur cilia 

 One terminal, three postero-lateral spines on telson 



lateral spines are still present, the innermost flattened and wide throughout most of its 

 length ; the middle spine is rather reduced but bears the normal spinules on the inner 

 and dorsal surfaces. The telson is roughly double the length of the sixth abdominal 

 segment. 



13 



