118 BRITISH COPEPODA. 



This very well-marked species has occurred amongst 

 dredged material from several places, but except at 

 Red Cliff, where several examples were found, it seemed 

 to be extremely scarce. The following are the locali- 

 ties : In twenty-seven fathoms off Hawthorn, Durham ; 

 thirty to thirty-five fathoms off Staiths, Red Cliff, and 

 Robin Hood's Bay, Yorkshire ; Clew Bay, Ireland ; 

 off Callum's Hole, Bute, sixteen fathoms ; Oban, 

 twelve to sixteen fathoms (Rev. A. M. Norman). 



6. DACTYLOPUS BREVICORNIS, Glaus. PL LVII, figs. 10 



-12 ; PL LVIII, fig. 14. 



Dactylopus brevicornis, Glaus. Die-Copepoden-Fauna von Nizza, 

 p. 29, taf. iii, figs. 2025 (1866). 



Body elongated ; abdomen short and broad ; rostrum 

 of moderate length. Anterior antennae (fig. 10) ex- 

 cessively short and stout, thickly clothed with hairs, 

 five-jointed ; fourth joint short, fifth more than twice 

 as long and more slender. Inner branch of posterior 

 antenna 3-jointed. Mouth organs very similar to 

 those of D. tisboides. Lower foot-jaw short and stout 

 (fig. 11), the hand somewhat oblong-quadrangular and 

 bearing a stout, curved, terminal claw. Both branches 

 of the first pair of feet short and (PL LVIII, fig. 14) 

 nearly equal in length ; first and second joints of the 

 outer branch equal, twice as long as the third, which 

 is extremely short, truncate at the extremity, and 

 bearing five strong curved seta3, increasing gradually 



