194 SCHIZOPODA AND ISOPODA FROM THE BAY OF BISCAY. 



Leptomysis sp. 



Station XI. One male, 11 mm. 

 One female, 11 mm. 



These two specimens differed from L. gracilis (1) in having the 

 dermis quite smooth instead of hispid ; (2) the rostrum is quite short, 

 and does not extend beyond the eyestalks, whereas in L. gracilis it is 

 produced into a broadly triangular acutely pointed plate, which 

 extends beyond the middle of the basal joint of the antennules. 

 Otherwise they agree perfectly with normal specimens of L. gracilis, 

 and it seems better to await further material before deciding whether 

 they represent a hitherto undescribed form, or are merely abnormal 

 specimens of L. gracilis. 



Mysidetes Farrani (Holt and Tattersall). 

 Station XII. Four females, 18 mm. 



Boreomysis arctica (Krdyer). 

 Station XIT, Two males, 15 and 18 mm. 

 One female, 14 mm. 



Schistomysis ornata (G. 0. Sars). 



Station V. Two males, 14 mm. 



Eight females, 12-15 mm. 



Station XI. Three females, 14 mm. 



Both the stations at which these species occur are over 100 fathoms 

 in depth. This depth is most unusual for the species, the greatest 

 depth at which it has previously been captured being 50 fathoms. I 

 cannot, however, at present find any substantial difference between 

 these specimens and those from shallower water, and I am, therefore, 

 obliged to consider them as belonging to the same species. 



ISOPODA. 



In all ten species of Isopoda are here recorded from the material 

 collected by the Huxley. Of these only four have hitherto been 

 found in the Bay of Biscay, viz., Cirolana borealis, Cirolana Hanseni 

 (the type specimen of which was dredged by the Caudan expedition 

 a little further south of the area explored by the Huxley), Eurydice 

 truncata, and lanira maculosa. 



The remaining six species have not been recorded from localities 

 south of the British and Irish marine area, so that the present records 

 indicate the most southerly limit of their known geographical range. 



With regard to the bathymetric range of the species, I am not 



