1903. 



PLANKTON OF THE FAEROE CHANNEL. 



131 



Text-fig. 13. ov . 



Text-fig 15. 



Text-fig. 17. 



Telsons of larvae attributed to Thysanoessa longicaudata, showing reduction of the 

 primitive seven pairs of spines and formation of the median unjointed spine 

 of the telson. 



Fig. 13. Early Calyptopis, 1'5 mm. long. 



14. Furcilia, 4'5 mm. long. 



15. Cyrtopia, 5 mm. long. 



16. Late Cyrtopia, 5 mm. long. 



17. 4 mm. long. 



9* 



