516 



THE VOYAGE OF H.M.S. CHALLENGER. 



The pleopoda are all in an equally advanced condition. The first pair is branched 

 and small. The second and the three following, which are biramose in the adult, have the 

 branches at this stage in a state of gemmation and are scarcely longer than broad. The 

 sixth or posterior pair, which in the adult assists to form the large rhipidura, is further 

 developed than the preceding pleopoda ; the two branches are unequal, the outer being 

 much the larger. The terminal somite or telson is broad at the extremity, delicately 

 thin and membranous, and the posterior margin is sparingly fringed with cilia. 



Glyphocrangon podager, n. sp. (PI. XCIII. fig. 2). 



Like Glyphocrangon granulosis, but having the posterior pair of pereiopoda 

 terminating in a thick cylindrical dactylos that abruptly terminates in two small points. 



Habitat. — Station 146, December 29, 1873; lat. 46° 46' S., long. 45° 31' E.; near 

 Marion Island ; depth, 1375 fathoms ; bottom, Globigerina ooze ; bottom temperature, 

 35° "6. One specimen ; female. Trawled. 



This species very closely approximates to Glyphocrangon granulosis, and I should 

 most probably have considered it as belonging to that species but for the peculiar form 

 of the dactylos of the last pair of pereiopoda (fig. 2o), which is cylindrical until near the 

 apex, when it suddenly narrows to a blunt end and terminates in two small points. 



It further differs in being less tuberculated, more especially between the carinas on 

 the carapace, where the tuberculations are not prominent, but rather more so than is 

 represented on the plate. The rostrum of the carapace is longer than the peduncle of 

 the first pair of antennas, while in Glyphograngon granulosis it does not reach so far, 

 and it has the lateral margins less tapering than in the latter species, until they suddenly 

 approach each other near the extremity. The ophthalmopoda are also smaller in 

 proportion than in that species ; the scaphocerite is as long as the peduncle of the first 



