﻿304 Proceedings of the Royal Physical Society. 



preserved ranges from 15 mm. to 25 mm.} and the number of 

 tentacles is about 160. 



Eutonina socialis was named and described by Dr Hartlaub 

 in 1897 ^ from specimens collected at Heligoland, but prior to 

 that it had been obtained at St Andrews, and well figured 

 though not named, by Prof. M'lntosh.^ Hartlaub has seen 

 one of the St Andrews specimens, and states it belongs to his 

 species.* It does not appear to have been recognised outside 

 the ISTorth Sea area. According to Hartlaub its hydroid is a 

 Campanulina. 



Tima bairdii (Johnst.). 



Medusa (Tima) sp., Dalyell's "Rare and Remarkable Animals of Scot- 

 land," vol. ii. (1848), p. 250, pi. lii. fig. 5. 



Tima bairdii, Forbes's Monograph (1848) ; and Leslie & Herdman'.s 

 Catalogue (1881). 



On December 5th this interesting and beautiful medusa 

 was present in hundreds in both the principal and the old 

 harbours at Dunbar, swimming at or near the surface in 

 every sheltered corner. Although mild, the day was dull 

 and stormy. The majority of the specimens were mature, or 

 nearly so, averaging about 35 mm. in width (the largest 

 taken was about 50 mm.), but immature ones from 15 to 25 

 mm. were not uncommon. A few, mostly immature, were 

 met with in Burntisland Harbour on 12th and 14th Decem- 

 ber, and on 21st they were there in great profusion, many 

 being full grown (50-60 mm.), and bearing ripe gonads. On 

 a few of them the curious Hyperia galha was found, but both 

 here and at Dunbar another crustacean, Metopa alderi (Bate), 

 was much more common upon them. 



Half a dozen from Dunbar were kept alive in a glass jar 

 for about a week. Swimming was effected by contractions 

 of the bell (and tentacles) at the rate of about 40 per minute. 

 On the jar being placed in the dark and sharply struck or 



^ Mature specimens since obtained (June 1909) at Burntisland attain a 

 diameter of as much as 35 mm. 



2 Wissensch. Meeresuntersuch. . . . deutsch. Meere, etc., N. F., Bd. ii. 

 (1897), p. 506. 



3 1th Ept. {for 1888) Fish. Bd. Scot, pt. iii. p. 282, pi. v. figs. 6-9 ; and 

 Ann. and Mag. Nat. Hist., 6 ser. v. (1890), p. 300. 



4 Op. cit., Bd. v., Abteil. Helgoland, Heft 2 (1904), p. 103. 



