LICHOMOLGUS. 47 



the outer margin has a long spine at a little distance 

 from the apex, and is fringed with closely-set cilia ; 

 the inner margin has, near the middle, a series of five 

 or six stout setee. The abdomen is slender, the first 

 segment swollen, and twice as long as any of the rest, 

 second, third, and fourth segments about as long as 

 broad ; caudal laminae longer than the last abdominal 

 segment, and about thrice as long as broad, bearing one 

 short seta about the middle of the outer margin, and 

 three at the apex, of which two are long and one very 

 short, the innermost about equal in length to the four 

 abdominal segments. The ovisacs of the female are 

 large and divergent, reaching nearly to the extremity 

 of the abdomen. Length Ysth of an inch (1'9 mm.). 



I have seen only three specimens of this species, 

 one of which was dredged off Battery Point, Cumbrae, 

 one off Robin Hood's Bay, in a depth of thirty fathoms, 

 and one off Seaton Carew (Durham), in four fathoms, 

 on a sandy bottom. There can be no doubt of its 

 specific distinctness, but various details of structure 

 remain yet to be worked out. 



4. LiOHOMOLGUS Thoeellii, Brady and Bohertson. PI. 



LXXXVIII, figs. 1-9. 



Lichomolgus Thorellii, B. & R. Brit. Assoc. Report, p. 197 

 (1875). 



Anterior antennae (fig. 1) 7-jointed, the last joint 

 very small, third about twice as long as the seventh. 



