GAM MA HI DTE. ]'.ii) 



joint Ity joint : and a uniartitulatc socondaiy appondajije is attached 

 to the superior pair of anteiuue, which is lost iu the adiJt. 



2. Atylus Hiixleyanus, n. s. (Plate XXV. fig. 4.) B.M. 



Male. — Cophalon not produced into a rostrum. Last segment of the 

 pereion and fii-st three of the pleon earinated, and each pro- 

 duced posteriorly into a tooth. Eyes round. Superior antenna; 

 scarcely as long as the inferior ; flagellum three times as long as 

 the peduncle, ha\ing every third articulus inferiorly and distally 

 dilated and crested with auditory cUia. Inferior antenna) half as 

 long as the animal ; peduncle scarcely longer than the peduncle 

 of the superior ; flagellum having the articuli short, broader than 

 long, carn-ing upon the .superior distal extremity of each a fasci- 

 cidus of short hairs, which gives to the appendage a serrated ap- 

 pearance. Mandibles having the thu-d joint of the appendage 

 arcuate, and ciliated upon the concave margin with alternate 

 simple and long plumose hairs ; incisive margin multidentate ; 

 secondaiy plate powerfully bidentatc ; molar tubercle long, narrow. 

 Onatliopoda subcqual, ha\'ing the propodos in each oval ; palm 

 continuous with the inferior margin, imperfectly defined by two 

 spines fringed with short cilia ; dactylos armed wdth a series of 

 short, equidistant, solitary hairs. Pereiopoda subequal, three 

 posterior pairs having the dactyla not reversed. The penultimate 

 pair of pleopoda a little shorter than the antepenultimate ; ulti- 

 mate longer than the two lu-cccding, and edged with a few short 

 stout spines and plumose cUia. Telson long, narrowhig to the 

 apex, and cleft, but not deeply, at the apex. 



Length ^ths of an inch. 



Ilab. Hermit Island (Antarctic Expedition). 



Under the microscope the integument is seen to be granulated, 

 and interspersed with larger spots, which seem to ])ei-[orate the 

 tissue and support short hairs in each. Larger markings, some- 

 what resembling the representation of a ilying bird, are less profusely 

 scattered over the whole structure. 



The species is named in comjjliment to Prof. Huxley. 



3. Atylus viUosus, n. s. (Plate XXVI. fig. 1.) B.M. 



Mah. — Cephalon produced into a short rostnim. Pereion having the 

 posterior segments earinated. Pleon having the first thre<! segments 

 earinated and posteriorly elevated, but not prolonged into teeth ; 

 inferior margins serrated; fourth segment having a deep doi-sal 

 sinus, and tlic posterior margin produced into a tooth: fifth 



