130 BEITISH COPEPODA. 



2. NoTODELPHYS CERUJ^EA, Thorell. PL XXVII, figs. 



10—13. 



Notodelphys cerulcea, Thorell. Log. cit., p. 37, tabs, iii and iv, 



fig. 4 (1859). 

 ? tenera, Thorell.. Ibid., p. 36, tab. iii, fig. 3. 



This species differs scarcely at all from the prece- 

 ding. The posterior antennse (fig. 11) have near the 

 margin of the apical joint two subcrescentiform rows 

 of small cilia, the branches of the fifth pair of feet 

 (fig. 13) are somewhat shorter and wider than in 

 N. ascidicola, and the first foot has the outer margin 

 of its first joint (fig. 12) either smooth or very finely 

 denticulated. The ova and ovaria are said to be blue. 

 Length of female |-th — ^th of an inch (3 — 4^ mm.), 

 of male -jVth — T^th of an inch (1^- — If mm.). 



I cannot find any good reason for separating this 

 from the foregoing species, but for the present retain 

 it, giving drawings of the more prominent distinctive 

 characters. 



I have notes of its occurrence in the following 

 British localities : — In Ascidia parallelogramma, off 

 Hawthorn (Durham Coast) ; in Ascidia parallelo- 

 gramma and A. venosa, Shetland, and from between 

 tide-marks, Roundstone (Rev. A. M. Norman). 



3. Notodelphys agilts, Thorell. PL XXVI, figs. 



1—10. 



Notodelphys agilis, Thorell. Loc. cit., p. 40, tabs, iv, v, fig. 6 (1859). 



The caudal segments of the abdomen are here more 



