288 AMPniroDA normalia. 



third; first articulus of the flagellura longer than the peduncle 

 and as broad near the base, but gradually decreasing ; all the other ■ 



articidi are short and slender, shorter than broad near the base, 1 



but sUghtly increasing until they are longer than broad towards 

 the extremity. Inferior antennae a httlc shorter tluin the superior ; 

 peduncle longer than that of the superior ; the last joint is longer 

 than the two preceding and terminates truncately, ha\ing the in- 

 ferior distal margin anteriorly produced ; flageUum having the first 

 articulus nearly as long as the last joint of the peduncle, com- 

 mencing nearly as broad, but suddenly and immediately narro^^ing 

 to half the diameter ; all the other articuli are short and slender, 

 commencing as broad as long, and gradually increasing in length 

 untn each articulus is nearly three times as long as broad. Man- 

 dibles having a three-jointed naked appendage ; last joint longest. 

 Gnathopoda subequal, small : first pair haviag the meros and caqKis 

 inferiorly produced and tipped with several stiff spines ; propodos 

 narrow, tapering, the inferior margin serrated, the serrature being 

 formed by a series of teeth, each consisting of three, closely appHed, 

 and increasing in length anteriorly; dactylos sKghtly curved, sharp, 

 and armed upon the inner side with a serrature similar to that on 

 the inferior margin of the propodos, but less regular. Second pair 

 of g-nathopbda much resembling the first, but having the carpus a 

 little more infero- anteriorly produced; the propodos slightly longer, 

 and having the armatm-e on the inferior margin less conspicuous, as 

 also upon the dactylos. Pereiopoda subequal in size and length. 

 Antepenultimate pair of pleopoda having the rami subequal, 

 nearly as long as the peduncle: penultimate pair shorter than 

 the preceding, and not longer than the peduncle of the idtimate ; 

 rami siibequal, and as long as the peduncle : idtimate pair having 

 the inner margin of the peduncle slightly serrated; rami sub- 

 equal, half as long as the peduncle. Telson ovate, nearly half the 

 length of the peduncle of the posterior pair of pleopoda. 

 Length ^ths of an inch. 



Hah. Carrickfergus (Prof. Kinahan) ; Greenland (Kroijer). 



The antenna in the British specimen are shghtly longer than those 

 figured by Ki'oyer, and the inferior pair have the peduncle trun- 

 cated instead of being slender and tapering to the flageUum ; but 

 Kroyer's figure not being carefidly drawn, I am incHned to believe 

 that they are the same species, and that these shght differences are 

 owing to the inaccuracy of the artist. 



I am indebted to Professor Kinahan for this and the following 

 species. 



