482 COROPHIIDiE. 



is very much narrower than the body, and generally lies 

 bent up against the underside of the body of the animal. 

 The eyes are prominent. The superior antennas do not 

 reach beyond the extremity of the peduncle of the 

 inferior. The inferior antennae are nearly as long as 

 the animal ; the last joint of the peduncle is very long, 

 being quite as long as the three preceding ; the flagellum 

 consists of one very long and one or two minute termi- 

 nal articuli. The first pair of legs have the hands a 

 little longer than the wrist, with no defined palm, and a 

 strong curved finger. The second pair of legs have the 

 hands very much larger than those of the first pair, being 

 equal in length to the head and the first two segments 

 of the body ; they are oval in form, the upper edge being 

 more arched than the lower ; the palm is crenulated, 

 defined by a blunt tooth, and runs continuously with 

 the inferior margin ; the finger is longer than the 

 palm, narrow, and arcuate. The thighs of the three 

 posterior pairs of walking legs gradually increase in 

 dilatation, and the last two pairs are very much longer 

 than the others. The three pairs of caudal appendages 

 have subfoliaceous branches, and decrease posteriorly in 

 length, the last scarcely reaching beyond the extremity 

 of the terminal scale, which overlays them, and which is 

 circular and scale-like. 



We have only as yet received specimens of this 

 species from Mr. Webster, some of which he dredged 

 off Falmouth, the others he obtained on the beach, at 

 low water, at St. Michael's Mount. 



Some specimens (mixed with those of the genus 

 Podocerus) have long existed unrecognized in the Col- 

 lection of the British Museum, procured by Dr. Leach, 

 probably from the South Coast of Devon. 



The females of this species appear to differ from the 



