OF THE FIRTH OF FORTH. 57 
Dr M‘Bain mentions it in his list, and we 
dredged some large specimens in 10 to 20 
fathoms, east of Inchkeith, last summer. 
Botryllus calendula ? (Giard). 
We refer provisionally to this species 
some specimens of a rather delicate 
Botryllus which we dredged last summer 
in 14 fathoms, off Longniddry. The speci- 
mens were encrusting large individuals of 
Ascidia virginea. 
Botryllus calendula was described by 
Giard* from Roscoff, on the coast of 
Brittany, where it is stated to be very rare. 
Botrylloides rubrum (Milne-Edwards). 
The specimens which we have found in 
the Firth of Forth have belonged to the 
yellow varietiest of the species, and not 
to the typical red form. They were from 
Elie, and were taken at low water mark 
at spring tides. 
B. radiata ? (Alder and Hancock). 
A few specimens which we found along 
with the last species may be referred pro- 
visionally to Botrylloides radiata. It is 
possible that this species may be merely a 
variety of B. rotifera (M. Edw.). 
B. albicans (Milne-Edwards). 
We have obtained this species at low 
water mark near Newhaven. 
POLYCLINID. 
Aplidium caliculatum (Savigny). 
We obtained a large specimen in an ex- 
cellent state of preservation from the 
stomach of a cod last summer. 
This species, having a long filiform post- 
abdomen, a channelled stomach, and a 
* Recherches sur les Synascidies (Arch. Zool. expér., t. 1, p. 623, 1872). 
+ See Giard, loc. cit., p. 632. 
