SCHIZOPODA AND ISOPODA FROM THE BAY OF BISCAY. 193 



especially in the rudimentary inner brancli to the third pleopods of 

 the male and the curiously twisted rami of the second pleopods of the 

 same sex. 



It is curious to note in this respect that Holt and Beaumont, 

 writing of Gastrosaccus sanctus from the west of Ireland,* remark: 

 " most of the specimens from Bofin have practically no trace of the 

 upturned processes of the hind margin of the carapace, though agree- 

 ing in other respects with the type." From these observations it 

 would seem that the presence or absence of lobes is a character which 

 cannot be relied on either for generic or specific separation, but the 

 point is obviously one that requires further investigation. In the 

 meantime, the present specimens agree so well with H. Normani in 

 other respects, that I provisionally record them here as that species. 



Anchialinaf agilis (G. 0. Sars). 

 Station X. Ten males, 6-9 mm. 



Twenty-eight females, 6-9 mm., most of them ovigerous. 



Amblyops abbrieviata, G. 0. Sars. 

 Station XII. Fifteen males, 12-16 mm. 

 Sixteen females, 12-16 mm. 



Paramblyops rostrata, Holt and Tattersall. 

 Station IX. One female, head and thorax only.* 



Pseudomma afl&ne, G. 0. Sars. 

 Station XII. Two males, 11 mm. 

 One female, 11 mm. 



Mysideis insignis, G. 0. Sars. 

 Station IX. One female, 25 mm. 

 Station XII. Ten males, 14-20 mm. 



Twenty-six females, 9-22 mm. 



Mysidopsis didelphys (Norman). 

 Station V. One male, 13 mm. 



A specimen of the Isopod parasite, Aspidophryxus j^cltatus, G. 0. 

 Sars, was found attached to the basal joint of the left antennule. 



Leptomysis gracilis, G. 0. Sars. 

 Station X. One female, 10 mm. 



* Holt and Beaumont, Sci. Trans. Royal Dublin Soc, Series ii., Vol. vii., Pt. vii, 

 1900. 



t Anchialina, Norman for Anchialus, G. 0. Sars. See Norman and Scott, " Crustacea 

 of Devon and Cornwal]," London, 1906, p. 24. 



