NOTES ON THE MICRO-FAUNA OF AILSA CRAIG, FIRTH OF CLYDE. 157 
accessible parts of the hill could be made at suitable seasons of 
the year, the list I now give might be considerably extendea. 
_ I may say, before concluding these “Notes,” that I was not aware 
of Mr. Lawson’s interesting History till just after our last visit to 
Ailsa Craig, and was under the belief that its natural history was 
better known than a perusal of Mr. Lawson’s work appears to 
indicate, otherwise a more careful search of that part of the Craig 
visited by us would have been made, and greater attention given 
to the numerous creatures we saw during the time we were ashore 
In the following list, which includes all the invertebrates 
observed by us, I am responsible for the names of the Mollusca 
and Crustacea ; my friend Mr. Percy H. Grimshaw, F.E.S., of the 
Museum of Science and Art, Edinburgh, very kindly favoured me 
with the names of the Coleoptera and of the single species of 
Hymenoptera that was obtained ; several other organisms that 
were met with have not yet been fully identified, and are referred 
to only by their family or generic names. 
List of Invertebrata observed on Ailsa Craig, Firth of Clyde, 
as explained in the preceding ‘‘ Notes” :— 
MOLLUSCA. 
Helix nemoralis, Linn., with dark bands. 
Helix nemoralis, Linn., yellow, and without bands. 
Hyalinia alliaria (Miller) = Zonites alliarius of Jeffrey's 
“¢ Conchology.” 
Pupa cylindracea, Da Costa, = Pupa umbilicata, of Jeffrey’s 
“ Conchology.” 
Clausilia rugosa, Draparnaud. 
CRUSTACEA. 
IsoPpoDaA. CoPEPODA. 
Oniscus asellus, Linn. Cyclops bisetosus, Rehberg. 
Porcellio scaber, Latreille. Moraria Anderson-Snuthi, T. and 
A. Scott. 
CLADOCERA. 
Alona rustica, T. Scott. 
Chydorus sphericus, Miller. 
