﻿302 Proceedings of the Royal Physical Society. 



Andrews Bay,^ and mentions Margelis ramosa, Agass., which 

 occurs in the Forth,^ as its hydroid. 



Sarsia tubulosa (Sars). 



Although well known in the adjoining Bay of St Andrews, 

 this graceful little medusa does not appear to have been 

 previously recorded from Forth waters. It was abundant in 

 the harbour at Dunbar on 27th June last, swimraincr about 

 in quite an active manner, with the long bluish manubrium 

 streaming from the pulsating pellucid bell. Our specimens 

 range from 7 mm. to 11 mm. in long diameter. 



The hydroid of Sarsia tnhulosa is believed to be a Syncoryne 

 — decipiens, Duj., according to Prof. M'Intosh, which is 

 stated to have been taken in the Firth of Forth by Strethill 

 Wright.^ 



Melicertidium octocostatum (Sars). 



Stomohrachiwn octocostatum, Strethill Wright's ' ' Observations on British 

 Zoophytes," 1863 4; and Leslie & Herdman's Catalogue (1881). 



A few specimens were taken in Dunbar Harbour on 3rd 

 and 5th October, the weather at the time being exceptionally 

 fine and warm. Three specimens preserved are of the same 

 size, namely, about 6 mm. across. 



Strethill Wright (I.e.) says this medusa "is occasionally 

 found in the Firth of Forth, in the neighbourhood of Queens- 

 ferry and Granton." This would seem to be the only previous 

 record from the Forth. At St Andrews, where it is common 

 (M'Intosh), it has been noted in January, August, October 

 (none mature), and December when it reached a diameter of 

 half an inch. We are not aware that its connection with 

 any hydroid form has yet been established. 



Tiaropsis multicirrata (Sars). 

 This was plentiful in Dunbar Harbour on June 27th, and 

 it was again observed there on July 2nd. In half a dozen 



1 "Notes from the St Andrews Marine Laboratory" {Ann. and Mag. Nat, 

 Hist, ser. 6, vol. v., 1890, p. 296). 



2 Leslie and Herdman, "Invertebrate Fauna of Firth of Forth," 1881, 

 p. 11. 



3 Hincks, 'British Hydroid Zoophytes,' 1868, p. 57. 



4 Proc. Roy. Phys. Soc, vol. iii. p. 42. 



