60 Messrs. Brady and Robertson on the 



Greenock, off the Pier, 2-6 fathoms. 



Cypris compressa, Baird. 

 Cypridopsis obesa, B. Sj- JR. 

 Candona albicans, Brady. 

 Cythere pellucida, Baird. 



castanea, G. O. Sars. 



porcellanea, Brady. 



viridis, Midler. 



crispata, Brady. 



lutea, Midler. 



villosa (G. O. Sars). 



angvilata (G. O. Sars). 



tubercidata, G. O. Sars. 



gibbosa, B. ^ B. 



Cytheridea papillosa, Bosquet. 



torosa (Jones), rar. teres. 



Eucythere Argus (G. O. Sars). 

 Loxocoucha tamarindus (Jones). 



pusilla, B. Sf R. 



impressa (Baird). 



graiiulata, G. O. Sars. 



fragilis, G. O. Sars. 



Cytberura nigrescens (Baird). 



cuneata, Brady. 



Robertson!, Brady. 



cellulosa (Norman). 



Paradoxostoma variabile (Baird). 



The first three species in the Greenock list were in all pro- 

 bability washed down from some habitat higher up stream ; 

 but the gathering is characterized by the presence of several 

 species indicating a sensible admixture of fresh water : e. g. 

 Cythere castanea.^ C. porcellanea, C. gihhosa, Cytheridea torosa^ 

 Loxocoucha pusilla^ L. fr'agilis, and Cytherura Rohertsoni. 

 Some, if not all, of these may doubtless be occasionally met 

 with in purely ma<rine situations ; but their presence together, 

 constituting one third of all the marine species in the gather- 

 ing, gives an unmistakably brackish aspect to the group. 



The most noteworthy species in the Clyde lists are Bytho- 

 cythere turgida, which occurred in greater abundance and 

 better condition than we have previously witnessed, and three 

 species of the genus Cytheropteron, two of which (C. inor- 

 natum and C. angulatum) are new to us in the recent state, 

 though we had found the latter sparingly as a fossil in certain 

 glacial clays. The other species [C. alatum, Sars) has been 

 recorded by Mr. Norman as an inhabitant of the British Seas, 

 on the strength of a single specimen dredged a few miles east 

 of the Island of Balta, Shetland. We are now able to add 

 two habitats in the Frith of Clyde, Kilchattan Bay and 

 Rothesay Bay, both in the Island of Bute. Mr. Norman 

 having already (last Shetland Dredging Report) quoted Sars's 

 description of the species, it is needless here to redescribe it : 

 Ave, however, give figures (PI. II. figs. 4, 5, 6 ) from British 

 examples, which will more vividly realize one of the most 

 beautiful and remarkable of British Ostracoda. The Clyde 

 specimens are rather smaller, and have the spinous armature 

 of the alse less perfectly developed than those from Norway, 

 for examples of which we are indebted to the kindness of Dr. 

 Sars ; they also exhibit, when viewed from above, a remark- 

 able appearance on each valve, as of a large obsolete indenta- 



