274 
Part III. — Ninth Annual Report 
PEOTOZOA. 
Ehizopoda were common all over the loch. Several forms were obtained 
in the dredged and hand-netted material ; the following are the more 
typical varieties observed : — 
Difflugia pyriformis. This form varies from pear to balloon shape, but 
the pear shape is usually the more common. 
Difflugia glohularis. — The test is more or less globular, J to \ being 
truncate and forming the aperture ; this form was much less frequent than 
the last. 
Difflugia corona. — Test crown shaped, furnished posteriorly with few 
or more cornua. This appeared to be a scarce form. 
Difflugia marsupifomiis. — Test from the side view varies a good deal, 
but the most common form was that of a slightly eccentric and depressed 
hemisphere. The aperture is not central, but is situated more to one side, so 
that its outer margin is usually close to the edge of the test, while the inner 
margin is some distance from the opposite edge. This form of Difflugia 
was of frequent occurrence. 
DIATOMACEA. 
Diatomacea were abundant, especially in the deeper parts of the loch, and 
included a considerable number of species. J. Rae, M.D., and Mr 
Robert Kidston, F.R.S.E., F.G.S., have kindly furnished me with the 
following list of species : — 
Amphora ovalis, Kiitz. 
Asterionella formosa, Hassal. 
Cymhella cymhiformis, Ehr. 
,, anglica, Lagenstedt. 
cistula, Hempr. 
Cyclotella operculata, var. mesoleia, Grun. 
Ceratoneis arcus, Kiitz. 
Campy lodiscus costatus, W. Sm. 
Cocconeis scutellum, Ehr. 
pediculiis, Ehr. 
Cymatopleura solea (Breb.), W. Sm. 
Diatoma vulgare, Borq. 
temte, Kiitz, 
Epithemia turgida (Ehr, ), Kiitz. 
sorex, Kiitz. 
Encyonema ccespitosum, Kiitz. 
Fragilaria virescens, var. (1) exigua,Gr\in, 
,, construens, var. binodis, Grun. 
mutabilis, (W. Sm.), Grun. 
Gomphonema {acuminata var.), Brebis- 
sonii, Kiitz. 
Gomphonema intricatum, Kiitz. 
,, olivaceum, Ehr. 
Meridian circulare, Ag. 
Melosira orichalcea, W. Sm. 
varians, Ag. 
Navicula Smithii, Breb. 
radiosa, Kiitz. 
var. acuta, Kiitz. 
p'as^r'im (Ehr. ), Donkin. 
,, viridula, Kiitz. 
mesolepta, Ehr. 
,, liviosa, Kiitz. 
,, gibba, Ehr. 
,, pusilia, Sm. 
Reinhardti, Grun. 
sp. 
Nitzschia sigmoidea (Ehr.), W. Sm. 
,, thermalis (Kiitz), Grun. 
PleuTosigma acuminatum (Kiitz), Grun. 
,, Spenserii, W. Sm. 
Stauroneis anceps, Ehr. 
Surirella linearis, W, Sm. 
,, biseriata, Breb. 
,, ovalis, Breb. 
Tabellaria fiocculosa, (Roth,), Kiitz. 
Tryblionella angustata, W. Sm. 
„ ,, var. curta, Grun. 
2. Raith Lake, Camilla Loch, and Lochgelly Loch in the 
County of Fife. 
These lochs were visited during the month of August, and were exam 
ined by band-net from the shore. 
