4 DEPARTMENT OF THE NAVAL SERVICE 
7 GEORGE V, A. 1917 
SILICOFLAGELLATA, 
Of this group only one form was observed, Distephanus speculum (Ehr) Stohr, 
and this only on three occasions. It was frequent in a gathering from the 6-metre 
level on March 6, but on the other two occasions it was rare (October 20, 6-metres) or 
occasional (March 2, surface). 
RHIZOPODA. 
No Radiolaria were observed. These forms being essentially pelagic, it seems 
probable that they would only rarely, if ever, be found in waters so remote from the 
open sea as those in the neighbourhood of St. Andrews. Foraminifera, too, were 
absent, a single Rotalia being the only one observed, and that in a gathering which 
contained a good deal of sand, indicating that the net at the 6-metre level had come 
into contact with the bottom. 
CILIATA. 
In addition to a Vorticellid that was almost invariably found attached. to the 
Copepod Acartia clausii, a number of ciliates belonging to the family Tintinnodes 
were observed. The genus Tintinnopsis was represented by at least three species, the 
most frequent of which was 7’. campanula (Ehy) Daday. Examples of a form which 
is probably to be regarded as a variety of this were found on one occasion, 
their peculiarity being that they tapered aborally much more rapidly than the 
typical campanula, thus resembling closely the form figured by Brandt! in his fig. 8, 
pl. xxi. A single example was seen of 7. ventricosa (C. and L.), characterized by its 
somewhat rotund “house,” tapering aborally to a blunt point and with the mouth- 
opening greatly constricted by a circular prolongation, which, in the preserved 
example, was horizontal in position. A third form, of which again but a single 
example was seen, was considerably larger than the others and had an almost cylin- 
drical form, enlarging only very slightly towards the mouth, and being rounded 
aborally; the length was about twice the breadth. In its general form it resembled 
closely that described by von Daday? as T. beroidea, but Brandt does not consider 
this identical with the form originally so named by Stein. Among the species 
described by Brandt the greatest similarity of form is shown by T. sacculus, but, 
unfortunately, the notes and drawing made of the St. Andrews form are insufficiently 
detailed to make identification with this certain. 
Of occasional occurrence, and in one gathering (October 20) almost frequent, 
was a species of Cyttarocylis, whose specific identity is also uncertain. It resémbles 
C. Ehrenbergi (C. and L.) Fol. very closely in its general form and in the fact that 
the cavity of the “house” is not continued into the aboral prolongation. This latter 
structure, however, is cylindrical in form, showing no traces of the three flange-like 
ridges which Brandt regards as characteristic of the species, although these are not 
noted by other writers. The surface of the “house” presents a very fine reticula- 
tion and has a minutely and irregularly corrugated appearance, most pronounced in 
the aboral prolongation. Near the mouth there is a narrow circular enlargement 
upon which follows a thin ring, sometimes single, sometimes partly divided into two 
portions by a fine line, as if it were composed of a spiral membrane with one and a 
half turns. The free edge of the ring or spiral is practically smooth, and the appear- 
ance presented is similar to that described and figured by Jorgensen* for his 
1K. Brandt. Die Tintinnodeen. Ergeb. Plankton Exped., III, L, a., 1907. 
2E. von Daday. Monographie der Familie der Tintinnodeen. Mitth. Zool. Stat. Neapel, 
vii, 1887. ‘ ’ 
3. Jorgensen. Ueber die Tintinnoden der Norwegischen Westktste. Bergens Mus. Aarbog., 
1899. 
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