I.)(i A.MIMIIl'OnA NOKMAI.IA. 



posteriorly el<!vated, Imt ii')l in-oducod into ;i tooth. Eyes oval. 

 Superior luitenna) one-third .shorter than the inferior; peduncle 

 half the length of the flageUum, fringed along the inferior mar- 

 gin with thick transverse rows of hairs ; flagcUum having the 

 articuli long (as long again as wide), with the inferior distal 

 o.Kti'emity of eaeh dilated into a \'illose tubercle, supporting a 

 fasciculus of simple hairs and two auditory cilia. Inferior an- 

 tenna3 half the length of the animal; peduncle half the length 

 of the superior antenna), fringed along the superior margin with 

 thick transverse rows of hairs ; flagellum having the articuli one- 

 third shorter than those of the flagellum of the supeiior antennae, 

 squaraose ; superior margin \'illose, distaUy dilated, and cariying 

 three stout hairs. Gnathopoda subequal ; propoda long-ovate, 

 not broader than carpi ; palmie imperfectly defined, continuous 

 with the inferior margins ; superior margin carrying six transverse 

 rows of cihatcd hairs. Three posterior pairs of pereiopoda having 

 the basa imequal ; antepenultimate not dilated ; penultimate a 

 little dilated ; ultimate largely dilated. Antepenultimate pair of 

 pleopoda reacliing as far as the ultimate, having the margins of both 

 rami fringed with short obtuse spines ; penultimate pair scarcely 

 reaching beyond the peduncle of the preceding ; ultimate pair 

 having the rami fonr times as long as the peduncle, and fringed 

 with cilia. Telson deeply chvided, each half carrying a blunt sub- 

 apical spine. 

 Length -|-^ths of an inch. 



Hub. Hermit Island {Antarctic Expedition). 



This species is remarkable for the viUose tubercles upon both the 

 superior and inferior antemiae ; they appear to be arranged as if 

 those upon one pair antagonized with those upon the other, and 

 as if the animal used these organs for the pui'pose of grasping certain 

 objects. 



4. Atylus Swammerdamii. (Plate XXYI. fig. 2.) E.M. 



Amphitoe Swammerdamii, Edwards, Ann. des Sc. Nat. xx. ; Hist, des 



Crust, iii. p. 35. 

 Dexamine Gordouiana, Spence Bate, Synopsis, ^-c, Ann. Nat. Hist. 



Feb. 1857. 



fMiite, Hist. Brit. Crust, p. 178. 



Cephalon produced into a minute rostrum. Pleon having the fourth 

 segment with a deep dorsal sinus, the anterior w^all of which is 

 produced into a small tooth, and the posterior elevated into a 

 large posteriorly directed tooth. Eyes broad-ovate. Antenna? 

 subequal, about one-half the length of the animal : peduncle of 

 the superior about half the length of that of the inferior : pe- 



