LONGIPEDIA. 7 



termination of the thorax, in the male to the middle 

 of the abdomen, the last joint constituting about 

 three fourths of the whole length of the limb and 

 bearing three terminal and three lateral spines. The 

 feet of the third pair (fig. 6) are rather larger than 

 those of the fourth (fig. 7), and bear a series of marginal 

 spines on the first and second joints of the inner, and on 

 the second joint of the outer branch. The fifth foot in 

 the male (Plate XXXIY, fig. 8) consists of a moderately 

 broad central lamina bearing about eight marginal 

 setse, two of which are much longer than the rest and 

 are situated near the apex ; the two lateral segments 

 are smaller, one bearing a very long curved seta, the 

 other a short apical filament only ; the fifth pair in the 

 female (fig. 9) is rudimentary, consisting only of four 

 short setse. The first segment of the abdomen of the 

 male (Plate XXXY, fig. 8) has two lateral spines on the 

 inferior angles, while the fourth segment is armed with 

 a long, downward-pointing posterior spine ; the female 

 abdomen has none of these appendages, and the caudal 

 segments (fig. 9) are much narrower and more diver- 

 gent than in the male ; the longest of the two principal 

 tail setas is equal to about twice the length of the 

 abdomen. Length, i^-th. of an inch (1'4 mm.). 



Longipedia coronata is often taken abundantly by the 

 dredge on sandy or gravelly bottoms in depths of from 

 one to thirty fathoms or more ; it also occurs, though 

 in less abundance, on muddy bottoms and amongst the 

 fronds of fuci between tide-marks. It is readily dis- 

 tinguishable from all other species by the great length 

 of the inner branch of the second swimming foot ; the 



