LICHOMOLGUS. 49 



segments differ scarcely at all from those of the 

 female. 



I have not met with this species except off the coasts 

 of Durham and Yorkshire, in which district I have 

 memoranda of its occurrence as follows : Off Marsden, 

 twenty-five fathoms, amongst coarse, shelly sand, one 

 specimen only ; off Hawthorn, twenty-seven fathoms, 

 one specimen ; a few in a dredging, chiefly of Filagrana 

 implexa, in thirty-five fathoms, off Robin Hood's Bay. 



5. LICHOMOLGUS FUBCILLATUS, Thorell. PL LXXXVIII, 



figs. 1014. 



Lichomolgus furcillatus, Thorell. Om Krustaceer i ascidier, p. 74, 

 tab. xiii, fig. 20 (1859). 



The anterior antennas (fig. 10) are 6-jointed, the 

 second joint once and a half as long as the third ; 

 third, fourth, and fifth equal; last joint less than one 

 half the size of the preceding. Mandibles (fig. 11) 

 very slender, and but slightly ciliated near the base. 

 Inner branch of the fourth foot 2-jointed. Fifth foot 

 (fig. 14 a), narrow, oblong, bearing two apical setaa. 

 First abdominal segment in the female nearly as long 

 as the three following segments ; second, third, and 

 fourth equal, not quite as long as broad ; caudal ap- 

 pendages twice as long as the last segment, and about 

 four times as long as broad, bearing one short seta 

 beyond the middle of the outer margin, also four apical 

 setae, two of which are short, and two long, the 

 VOL. in. D 



