50 BEITISH COPEPODA. 



longest being in length about equal to the abdomen. 

 Length yg-th of an inch (1-5 mm.). 



A few specimens only of this species have been 

 found, and though they differ in some respects from 

 those of L. furcillatus, as figured by Thorell, more 

 especially in the characters of the caudal segments and 

 the fifth pair of feet, the differences do not seem 

 sufficiently pronounced to warrant their separation 

 from that species. The British habitats are the fol- 

 lowing : In the branchial sac of Corella parallelo- 

 gramma, Shetland (from specimens collected by the 

 Rev. A. M. Norman) ; taken in the tow-net in Round- 

 stone Bay and Westport Bay ; dredged in a depth of 

 7 8 fathoms, amongst muddy sand, in Lough Swilly ; 

 and in Mulroy Lough (Donegal), ten fathoms. Single 

 specimens only were found in each case. 



6. LICHOMOLGUS FORFICULA, Thorell. PL LXXXV, figs. 



1216, and PL LXXXVI, 

 figs. 1418. 



Lichomolgus forficula, Thorell. Om Krustaceer i ascidier, p. 73, 

 tabs. 12, 13, fig. 19. 



Anterior antenna (PL LXXXVI, fig. 14) 6-jointed, 

 first three joints of equal length, about thrice as long 

 as broad, fourth rather shorter, fifth half as long as 

 the third, sixth half as long as the fifth ; second and 

 third joints clothed with unusually long marginal 

 hairs. Posterior antennas 3-jointed, having two stout 



