CYOLOPIOERA. 



55 



imperceptibly serrated at the apex; palp slender, 

 bearing one very long and one short terminal seta. 

 Maxilla (fig. 5) 2-branched, each branch elongated, 

 digitiform, simple, and armed apically with three long 

 and stout set^. Anterior foot-jaw (fig. 7) 2-jointed, 

 and armed with a long doubly-curved claw; second 

 pair (fig. 8) longer, 3-jointed, with a long and 

 slender falciform claw. First four pairs of feet (fig. 9) 

 short and stout, nearly equal in size, both branches 

 3-]ointed; fifth pair (fig. 11 a, a) 2-jointed, the 

 terminal joint broadly ovate, bearing two marginal 

 spines and three apical setae. First abdominal somite 

 in both sexes large, quadrangular, sharply emarginate 

 in the middle, and having its lateral angles produced 

 into sharp spines posteriorly; the second somite is 

 about half as long and similarly angulated, and so 

 also is the third in the male, though not in the female ; 

 the second and third somites in the male are equal in 

 length, but in the female the second is considerably 

 shorter ; the fourth somite in the male is short, being 

 about equal in length to the caudal segments, which 

 are stout, and a little longer than broad; terminal 

 setse four in the male, five in the female, finely 

 plumose, two about as long as the abdomen, the rest 

 short. Colour pale brown, the feet smoky black, a 

 character which at once distinguishes the animal 

 amongst others. Ovisacs two, large, nearly spherical, 

 and divergent. Length ^th of an inch (1*2 mm.). 



This fine and very distinct species is generally dis- 

 tributed, but seems to occur in greatest abundance on 

 the north-east coast of England. I have notes of its 



