230 Proceedings of the Royal Physical Society. 



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 calendida ? (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 virgincct. 



Botryllus calendiUa w\as described by 

 Giard* from Eoscoff', on the coast of 

 Brittany, where it is stated to be very rare. 



Botrylloides ruhrurn (Milne-Edwards). 



The specimens which w^e have found in 

 the Firth of Forth have belonged to the 

 yellow varieties f 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. radiafa? (Alder and Hancock). 



A few specimens wdiich 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. rotifer a (M. Edw.). 



B. alhicans (Milne-Edwards). 



We have obtained this species at low 

 water mark near Newhaven. 



POLYCLINID^. 



Aplidium ccdiculatum (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 



* Kecherches sur les Sjmascidies (Arch. Zool. exper., t. 1, p. 623, 1872), 

 t See Giard, loc. cit., p. 632. 



