258 Soiiflicni Cross. 



its iiinor margin. Tliis hist joint is more setose than the otliers. 

 The femur is the stoutest joint of the limli, and is longer than the 

 three coxae tof,'etlier. On its inner margin the setae are sliort, but 

 on the outer they almost amount to spines, especially at the 

 extremity. 



Of the two tarsi, the proximal is both longer and stouter, both 

 exceed the femur in length, setose on the inner margin, the outer is 

 more thickly covered and the setae are almost in the nature of long 

 spines. The distal tibia bears three spines at its extremity ; of these 

 the middle one is much shorter than the other two. The tarsus and 

 ])ropos together are a little shorter than the second tibia, they are 

 slightly curved and tapering. The latter bears a long terminal claw 

 with a single minute accessory. The tail is an elongate ovoid. 



A very large number of indi\iduals of this species were taken off 

 Cape Adare at various dates and at depths varying between 20 and 

 26 fathoms. Almost all were in an exceedingly dirty condition, 

 duo to a thick orowth of diatoms of the genus Triccratium or 

 an ally, and other vegetable matter in a more or less decomposed 

 state. This foreign matter is very adherent and it is almost 

 impossiljle to clean satisfactorily many of them. It gives the 

 animal quite a woolly appearance to unassisted vision. Many 

 specimens, which apparently have recently moulted are quite light- 

 coloured and have a more " refined " appearance, being cleaner, and 

 the spines and setae are much sharper. 



REFERENCES. 



1. Batk, C. Spence. lleptiit on the Crustacea Macrura collected by II.^M.S. 



' ClinUvnrjer' during the years 1873-7G. 



11.M.8. ' ChaUemjcr' Reports. Vol. 24, Zoology. 1888. 



2. Bkdda HD, F. E. Eejiort on the Crustacea Isopoda collected by lI.M.Si. 



* Chullerifjer ' iXxmng the years 187;5-7(). Part II. 

 Il.M.S. ' C7/«//«'Hyf>' Keports. Vul. 17, Geology. 1886. 



3. TKNEbicT, J. E. 1'lie Arctiiridae in the T'.S. National ^luseum. 



Proc. iJiol. Hoc, ^VaslIington. Vol. 12, }ip. -41-55. 18118. 



4. CouTiKHK, H. Note iireliniinaire sur Ics Crustace.s dt'capodes jirovenant de 



Texpi'ditiun anfarctitiue belyc. 



C. 11. Aca.i., I'aris. \o\. 130, i^p. 1G40-1G43. 1900. 



5. Cunningham, II. O. Notes on the Reptiles, Aniiihibia, Fislies, Mollusca and 



Crustacea obtained during the voyage of 11. M.S. 'A'«.s.s-o«' in tlie veare 

 18(;(M;'.i. 



Trans. Linn. Soc, London. A'ol. 27, pp. 405-502. 1871. 



