350 transactions, natural history society of glasgow. 



Cladocera. 

 Alona guttata^ G. O. Sars. Alona affinis, Leydig. 



Amphipoda. 



Orchestia mediterranean Costa. Apherusa jurinii (M. Edw.) 

 Gammarus duebeni, Lilljeborg. 



Isopoda. 



Jcera marina (O. Fabricius). Eurydice pulchra^ Leach. 



Sj^hceroma rugicauda, Leach. Idothea haltica (Pallas). 



Ligia oceanica (Linne). Oniscus asellus, Linne. 



Forcellio scaher, Latreille. Fhiloscia muscorum (Scopoli). 



NOTES ON SOME OF THE SPECIES. 



As a detailed description of all the species mentioned in the 

 list is beyond the scope of this Paper, I confine my remarks to a 

 few of the rarer forms only, and chiefly to those among the 

 Copepoda, as follows : — 



COPEPODA. 



(1) Eurytemora velox (Lilljeborg). — This species, so far as its 

 British distribution is concerned, is most frequently found in 

 brackish water, and more rarely in fresh water. Though it 

 has not previously been noticed in the Hunterston district, 

 it has on several occasions been recorded from places within 

 the Clyde area, as at Rutherglen, where it was obtained by 

 Mr. James Steel, and in Possil Marsh — these two are fresh- 

 water localities; at Langbank, where I observed it two years 

 ago; and at Cumbrae, whence it is recorded by Prof. G. S. 

 Brady. E. velox was quite common in some of the pools at 

 Hunterston, and, being a moderately large species, the two 

 younger members of our expedition could, with their keener 

 eyesight and without artificial assistance, see the creatures quite 

 distinctly swimming in the water. 



Ectinosoma curticorne, Boeck. — This species is probably more 

 common in the Clyde district than it at present appears to be; it 

 is usually of a brownish colour, and as this harmonises with the 

 sort of material in which it commonly occurs, it is readily passed 

 over unobserved. In the examination of gatherings collected by 



