roRoriTiiD.-E. 237 



and fifth much hmgcr, all having the dilated basa tapering to tho 

 distal extremity. Antepenultimate and penultimate pairs of plco- 

 poda unifdrm, having a few e(|uidistant obtuse spines upon the 

 upper margin and extremity of each ramus ; posterior pair reach- 

 ing beyond the preceding, having two short blunt spines upon tho 

 upper margin of the base, and a row of five or six on the upper 

 margin of the distal extremity ; outer ramus terminating in two 

 strong hooks ; the inner ramus styliform, armed upon the upper 

 side ^vith a few short blunt spines, and tipped ^\ith some fine haii'S. 

 Telson acute. 

 Length -i-Jths of an inch. 



Uah. Arctic Seas. 



This specimen belongs to the Huntorian Museum of the College of 

 Siu'geons, and was kindly lent to me for examination by the Council. 



6. Amphithoe Falklandi, n. s. (Plate XLI. fig. 6.) B.M. 



Female. — Eyes round. Superior antcnuEe half the length of the 

 animal ; third joint of the peduncle longer than the preceding ; 

 flagellum longer than the peduncle, slender, having each articulus 

 foiu" times as long as broad. Inferior antenna) two-thirds as 

 long OS the superior, having the peduncle longer than the pe- 

 duncle of the superior ; flagellum longer than the last joint of the 

 peduncle, having each articulus a little longer than broad. Gna- 

 thopoda uniform, each pair having the upper margin of the carpus 

 arcuate, the inferior produced to an obtuse point ; propodos long- 

 quadrate, superior and inferior margins nearly parallel ; palm 

 straight, defined by a right angle furnished with a few hairs ; 

 dactylos longer than the palm, nearly straight. First two pairs 

 of pereiopoda subeqtial, ha\dng the basa and the mera dilated, and 

 the distal extremity of the latter anteriorly produced ; third pair 

 shorter than the preceding, having the dactylos short, straight, and 

 revei"sed; last two pairs sube(iual, considerably longer than the third 

 pail", having their ductyla long, arcuate, and chrected anteriorly. 

 Posterior pair of pleopoda reaching beyond the preceding, having 

 the inner ramus foliaceous, the outer terminating with two short, 

 strong hooks. 



Length | of an inch. 



Jfah. Falkland Islands (Mr. W. E. Wn'f/ht). 



7. Amphithoe Australiensis, u.s. (Plate XLI. fig. 7.) B.M. 



Eyes small, oblong, oblique. Superior antenna) one-third the length 

 of the animal ; peduncle having the first joint as long as tlio 



