264 



Part III. — Sixteenth Annual Report 



but Drs. Brady and Norman, in their recent monograph on this group of 

 Crustaceans, have redescribed and named it as above. 



Cytherura dathrata, G. 0. Sars. This pretty species was dredged at 

 Tarbert Bank, Loch Fyne. Though generally distributed, it is not very 

 common. 



Cytheropteron arcuatum, Brady, Crosskey, and Robertson. I am 

 indebted to Mrs. Robertson for the record of this species. Cytheropteron 

 arcicatum was frequent in the post-tertiary clays of Garvel Park, Greenock, 

 and is apparently a true arctic or sub-arctic species ; still, the limits of its 

 distribution may extend beyond these regions. 



Cytherois fischeri (G. 0. Sars). It is to Mrs. Robertson that I am also 

 indebted for the record of this species. Though Cytherois fischeri has 

 not been specifically recorded for Loch Fyne before this time, it is so 

 generally distributed that there are comparatively few marine districts 

 where it may not be found. 



Paradoxostoma norintmi, Brady. I have obtained this very distinct 

 species of Paradoxostoma in one or two portions of the Clyde area, includ- 

 ing Tarbert Bank, Loch Fyne, but it does not appear to be at all common. 



Paradoxostoma ensiforme, Brady. This was one of the more frequent 

 species found at Tarbert Bank, as it also is in other parts of the Clyde. 



Paradoxostoma ohliquum^ G. 0. Sars. This, which is comparatively a 

 rare species, was likewise obtained in the material dredged at Tarbert 

 Bank. 



(5) The Copepoda. 



The Coi)epoda that fall to be recorded at this time include several 

 apparently undescribed forms, and it has also been necessary to institute 

 new genera for two of them ; but before proceeding to record and describe 

 these additions to the Loch Fyne Copepod fauna, I propose to give the 

 following definiti(m of a species previously recorded, which has, along with 

 the others, been the subject of special study. The species referred to was 

 recorded in the former catalogue of Loch Fyne Invertebrata under the 

 name of " (?) Pseudocalanus armatus, Boeck," but it has since been 

 removed from the genus Pseudocalanus of Boeck to Bradyidius^ Gies- 

 brecht. The following is a definition of this genus and species 



Bradyidius armatus (G. S. Brady), (PI. XIL, figs. 1-19). 



1878. Pseudocalanus armatus^ Brady (not Boeck). ' Mon. 

 Copep. Brit. Isl.,' vol. i. p. 46. 



1897. Bradyidius armatus (Brady), Giesbrecht. 'Zool. An- 

 zeiger,' No. 536. 



Description of the female. — Length, 2 "54 mm. ( J^j of an inch). Body, 

 robust, somewhat resembling jEtidius armatus (Brady) in general appear- 

 ance ; rostrum, distinctly bifid, but not so strongly produced as that of 

 ^Etidius (figs. 19-20) ; last thoracic segment produced at both sides into 



