260 Malcomson. — Recent Ostracoda of Belfast Lough. 



as well as five fresh water species,* which were found in the shore gatherings, 

 but these had evidently been carried down by streams, and consequently have 

 not been included in the present paper. 



Two tables are appended— one giving particulars of depth, locality, nature 

 of sea bottom, quantity of material examined, and number of species found in 

 each gathering; and the other showing the distribution and comparative 

 rarity of each species. 



I am very deeply indebted ta G. S. Brady, M.D., F.L.S., for the great 

 assistance he has rendered me in the identification of many doubtful specimens, 

 and for the valuable information he has given me about some of the more inte- 

 resting species. 



I must also thank my friend, Mr. Joseph "Wright, for his kindness in 

 placing his gatherings in my hands, and Mr. David Robertson, F.G.S., of 

 Glasgow, for his help in determining some of the critical species. 



The following species deserve special notice : — 

 Paracypris polita, G. 0. Sars. Only two or three single valves of this 

 species were found, all of them in one locality — viz., Brown's Bay, 

 Islandmagee, one of the excellent shore gatherings collected for Mr. 

 Wright's paper by Mr. Gray, M.R.I.A. 

 Bairdia inflata, Norman. This species seems to be fairly common in the 

 Irish Channel, but only one valve was found in Belfast Lough, and that 

 one at White Head, which is almost at the mouth of the Lough. 

 Bairdia obtusata, 67. 0. Sars. Only two specimens of this very rare 



species were found, both in the " Protector" dredgings. 

 Cythere cribrosa, B. C. and R. I have only seen one specimen of this 

 species. It has not been previously found in the recent state, but occurs 

 fossil in the Post-tertiary deposit at Bridlington, Yorkshire. 1 

 Cythere Cluthae, B. C. and B. Although rare, this species seems to be 

 generally distributed in the deeper water. Recent specimens have not 

 been previously recorded, but fossil ones occur in several post-tertiary 

 deposits. 2 

 Cythere Dunelmensis, Norman. This species seems to inhabit only a 

 very limited area in Belfast Lough, as it has been found in only two 

 gatherings, taken from stations which were close together— viz., off 

 Rockport, 4 fathoms, and Rockport shore sand. It is usually found in 

 much deeper water, and is not a littoral species. I think it is probable 

 that the shore sand specimens have been washed up by some current, 



* Potamocypris fulva, Brady; Cypris tumefaeta, B. and R.; Cypridopsis villosa 

 (JuHne). Candona albicans, Brady, and Candona compressa {Koch). 



(1.) See Post. Tert. Entom. Scotland, p. 146. 



(2.) See Post. Tert. Entom. Scotland, p. 153. 



