254 SoutJieni Cross. 



Pleon. Two segments are visible in the curve of the last thoracic, 

 the terminal one is ovoid with the small uropods placed laterally 

 some little distance from the extremity. 



First antenna. Small, reaching about one-third the length of 

 the fourth joint of the second antenna. Second joint of peduncle 

 longest. 



Second antenna. Very long, half as long a,gain as the body. 

 Peduncle five-jointed, the three proximal ones being short and stout, 

 the two distal ones being long and slender, sub-equal in size. The 

 flagellum is multiarticulate, not so long as the two distal joints of 

 the flagellum. 



Mandible. Cutting edge consists of a long slender three-lobed 

 tooth and a group of stout setae. Molar expansion well developed 

 and somewhat widely separated from the cutting edge. Palp three- 

 jointed, rather stout, first and third joint sub-equal, third the 

 longest. 



First maxilla. Normal. 



Second maxilla. Inner lobe truncate, with two long setae, 

 among others, on the inner margin, outer lobe and palp with very 

 long, stout terminal setae. 



Maxillipede. Masticatory lobe witli inner margin straight and 

 four small spines just above the middle. Extremity truncate and 

 outer margin rounded. Palp of five joints, of which the distal two 

 are proportionately slender, the next two are much expanded. The 

 epignath is large curved, truncate posteriorly, less so anteriorly. 



Thoracic limbs. The first is comparatively short and stout, sub- 

 chelate, meros and carpus expanded ; propodos ovoid, dactylus about 

 half its length and slender. The second pair of appendages were 

 missing, the remainder are long, slender, and increase in length to 

 the last, they are alike in structure. 



Uropods. Small, simple. 



Three specimens were taken off Cape Adare in 20 to 26 fathoms. 

 Temperature 28 • 9° Fahr. 



This is another species closely allied to a form described by 

 Dr. Pfeffer (24) for which he established the genus Haliacris. 



ECHINOZONE. 



This genus is one of four into which Professor Sars has divided 

 liis genus Ilyaraelma (29). Five species belong to the original genus, 

 but one of them is doubtful ; the other genera each contain a single 

 species. All but one are European or Arctic forms. 



