180 Part III. — Thirteenth Annual Report 



OSTRACODA. 

 Oypria Isevis (Miiller). 



Olabocera. 



Bury cer cits lamellotus (Miiller). Chydorus globosus, Braid. 



Alona quadrangularis (Miiller). Polyphemus pediculus (De Geer). 



Loch of Stourhoull. 



Some interesting things were obtained in the gathering from this loch. 

 Among the Ostracoda obtained here were Ilyocypris gibba and Cytheridea 

 lacustris ; w T hile the Cladocera included the curious Drepanothrix dentata 

 and Harporhynchus falcatus. The small roundish gelatinous bodies so 

 frequent in some parts of this loch appeared to be colonies of Diatoms, 

 held together by a confervoid growth of gelatinous consistency. Moll- 

 usca appeared to be rather rare. 



MOLLUSCA. 



Pisidium pusillum (Gmelin). Planorbis nautileus (Linne). 



Limnma pereyra (Muller). 



Loch of Snarravoe. 



The gathering from this loch is of interest from the number of Neomysis 

 vulgaris contained in it. The occurrence of this schizopod confirms still 

 further what has already been pointed out,* that Neomysis vulgaris can 

 live in perfectly fresh water, and be apparently 'at home' in it. The 

 Gammarus obtained here resembles more closely Gammarus dnabeni than 

 Gammarus pulex. Diaptomus serricornis and the fine Chydorus globosus 

 were quite frequent in this loch ; so also was Canthocamptus hirticomis. 

 No Mollusca were observed, but Notonectes and Hydrachnidx were fre- 

 quent. 



CRUSTACEA. 



SCHIZOPODA. 



Neomysis vulgaris (J. V. Thompson). 



Amphipoda 

 Gammarus (?) duabeni, Lillj. 



CoPEPODA. 



Diaptomus serricornis, Lillj. Cyclops serrulatus, Fischer. 



Cyclops signatus, Koch. Canthocamptus hirticomis, T. Scott. 



* Ninth Annual Meport of the Fishery Board for Scotland, Part III. p. 285. 



