ON A NEW E PIC ARI DAN ISOPOD. 



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Each joint is provided with a greater or less number of short 

 stiff hairs, which decrease in length from distal towards proximal joints. 

 The surface of proximal joints is beset with numerous minute spinous 

 processes. 



The mouth is guarded by a pair of mandibles, which arc provided 

 in the distal parts with minute curved hooks. These hooks are found 

 on both inner and outer sides of the mouth opening (Pl. VII, Fig. 3). 



The maxillipeds are lamellar. Each is composed of two segments, 

 of which the anterior is larger than the posterior. The anterior 

 segment is anteriorly usually rounded, but sometimes narrowed and 

 obtusely pointed ; without hairs ; posterior outer margin concave, with 

 two powerful muscles attached close to it ; two short beak-like projec- 

 tions may be seen at the outer border. Anterior end of the posterior 

 segment is elongate and acutely pointed, overwrapping the anterior 

 segment at base. No epignath was observed. 



Mesosome. Mesosome segments are best defined along the median 

 line of the dorsal surface. The first segment is very narrow and 

 band-like, flanking the cephalon on sides. Length of each mesosome 

 segment in specimen C, as follows. 



ist or foremost segment, 0,1 mm. 



2nd segment, 0,3 mm. 



3rd „ 0,5 mm. 



4th ,, 0,6 mm. 



5th ,, 0,8 mm. 



6th ,, 0,8 mm. 



7th or hindmost segment, 0,8 mm. 

 Sars seems to consider the assymmetry of body in adultfe male 

 Athelges to constitute one of the characteristic features of the genus. 

 At a place he remarks : " The peculiar contortion of the body in fully 

 grown female specimens has not yet been sufficiently recognized, for 

 the species have generally been described as perfectly symmetrical or 

 nearly so, an appearance which is only exhibited by immature 



