46 BRITISH COPEPODA. 



Delavalia reflexa was dredged by Mr. D. Robertson 

 and myself five miles off Hartlepool on a sandy bottom ; 

 several specimens were taken. 



3. DELAVALIA ROBUSTA, Brady and Robertson. PI. LI, 



figs. 1521. 



Delavalia robusta, B. & B. Brit. Assoc. Report, p. 196 (1875). 

 Spio brunnea, Idem. Ibidem. 



Rostrum as in D. palustris ; anterior antenna (fig. 



15) curved, profusely setose, first joint the longest, 

 fifth shortest. Basal joint of the mandible-palp (fig. 



16) of moderate length, branches about equal and 

 nearly as long as the base ; palp and digits of the 

 upper foot-jaw (fig. 17) small and simple. Inner 

 branch of the posterior antenna 3-jointed. First pair of 

 feet like those of D. reflexa, but that the terminal setae 

 of the inner branch (fig. 19) are stronger and the 

 principal one plumose ; the second, third, and fourth 

 feet have both branches equal (fig. 20), each joint 

 being produced into a strong spine at the distal 

 extremity of the outer margin. Fifth feet like those 

 of D. reflexa, but more profusely setose. Caudal 

 segments as in the two preceding species. Length y^th 

 of an inch ('85 mm.). 



This species was dredged in depths of twenty-five to 

 thirty-five fathoms in several places off the coasts of 

 Durham and Yorkshire ; off Staiths and Robin Hood's 

 Bay (Yorkshire) ; and off Hawthorn (Durham) ; in all 

 these places it occurred very sparingly. 



