of the Fishery Board for Scotland. 



139 



to be the one least affected by the changes incidental to the different 

 times of the year when the gatherings were collected ; Diaptomus gracilis 

 and Cyclops strenuus come next — these two, though more plentiful in the 

 warmer months, are apparently able, to a certain extent, to withstand 

 the greatly reduced temperature of the water during winter ; but L&ptodora 

 and Bythotrephes are evidently distinctly affected by seasonal influences. 

 Further remarks bearing on these questions will befound in the sequel. 



The Shore Fauna collected by Hand-Net. 



The Crustacea collected by hand-net along the shores of Loch Lomond 

 represented, as is usually the case, a much greater variety of forms than 

 those collected by tow-net, but individuals were less plentiful. As already 

 stated, three different portions of the shore were examined : — (1) That 

 part of the shore between Luss and Inverbeg ; (2) between Balmaha and 

 fiowardennan ; and (3) between Balmaha and the mouth of the River 

 Endrick (tw r o examinations being made of this part). A considerable 

 number of crustacean species were obtained, and also several species of 

 mollusca. The names of all the species are given in the annexed Table, 

 with the localities and dates of capture. 



Table containing the Names of Mollusca and Crustacea obtained 

 in Hand-Net Gatherings, with Date and Place of Capture. 



The abbreviations are the same as in the other Table. 



1 



Localities and Dates. 



Names of the Species. 



1 o4 



^ © on . 



MOLLUSCA. 



Pisidium fontinale (Drap.), 

 Pisidium nitidum, Jenyns, - 



Valvata piscina! is (Miiller), 

 Planorbis albus, Miiller, 



,, vitidus, Miiller, - 

 glaber, Jeffreys, - 

 Physa jbntinalis (Linn.), 

 Limncea peregra (Miiller), 

 ,, palustris (Miiller), - 

 ., truncatuhts (Miiller), 



CRUSTACEA: Amphipoda. 

 Gammarus p u lex ( Pe nn . ) , 



Isopoda. 

 A stilus aoitaticus (Linn.), 



COPEPODA. 



Diaptomus gracilis, G. 0. Sars, 

 Cyclops strenuiis, Fischer. - 



,, leuekarti, Claus, 



,, viridis (Jurine), 



,, a/bid us (Jurine), 



73 a 



fl (S c 



0> S3 

 0) cs © 



Q c « 



PQ Pm 



so 



,<N, 



u 



c 



0 



0 





0 



0 



0 





r. 



0 



0 



r. 



f. 



0 



0 



r. 



f. 



0 



0 



0 



fr. 



0 



0 



r. 



0 



0 



r. 



f. 



f. 



0 



0 



o 



r. 



0 



0 



r. 



0 



0 



r. 



r. 



0 



f. 



r. 



r. 



0 



0 



0 



r. 



f. 



f. 



r. 



0 



0 



f. 



f. 



0 



0 



f. 



0 



0 



0 



0 



f. 



0 



f. 



0 



0 



0 



f. 



