CLETODES. 95 



A. M. Norman) ; and in thirty-five fathoms off 

 Marsden, Durham coast. The number of specimens 

 found in each case was very small. The two figures 

 (16 and 17, in PI. LXXVII) show tail-segments of 

 different shapes, but whether they belong to male and 

 female of the same species, or to entirely distinct 

 species, I have not been able to satisfy myself. 



4. CLETODES LINEARIS, Claus. PL LXXX, figs. 1 14. 



Lilljeborgia linearis, Claus. Die Copepoden-Fauna von Nizza, 



p. 22, t. ii, figs. 18 (1866). 



Orthopsyllus B. & R. Ann. and Mag. Nat. Hist., vol. xii, 

 p. 138 (1873). 



Body elongated, nearly straight, cylindrical ; first 

 segment about as long as the three following. Ros- 

 trum moderately long. Abdomen as thick as the 

 thorax, and constituting half the length of the body. 

 Caudal segments very broad, scarcely equalling in 

 length the last abdominal segment; the posterior 

 borders of all the body-segments, except the last, are 

 fringed with rows of short rectangular teeth. An- 

 terior antennae short and stout, 4-jointed; in the 

 female (fig. 3) the inrer margin of the second joint 

 forms a very large and stout spine ; the third joint is 

 as long as the second, but only about half as broad, 

 the fourth is short and nearly square, truncate, bear- 

 ing several stout, short setae, and a curved spine at 

 the upper apical angle ; the second and third joints 

 also have several strong setae, and the ensiform appen- 



