46 Prof. M'Intosh's Notes from the 



and reached the surface of the water towards the end of the 

 latter month ; but in this neighbourhood it seldom is seen in the 

 enormous numbers characteristic of July in the Zetlandic area. 

 Both young {\ inch) and adults in full maturity (4 inches) 

 were procured in considerable numbers throughout August. 

 The larger forms became less conspicuous in September and 

 October, a distinct increase in size occurring during the latter 

 month in the younger forms, which range from 1^ to 2^ 

 inches. Large examples were observed in November in the 

 deeper parts of the water, and some of moderate size in 

 December. The species appears to spawn in July and 

 August, and most of the adults would seem to perish in the 

 autumn. Beroe is thus seldom absent from the neighbouring 

 seas. 



In a former number of this Journal* the occurrence of a third 

 Ctenophore,ZesweM/7a vitrea, M. -Edwards, in great numbers in 

 British waters was pointed out. Very little has been heard of 

 it in European waters since Milne-Edwards first described it 

 from the Mediterranean in 1841. This to some extent, how- 

 ever, appears to have arisen from confusion with other species. 

 Thus that patient and keen observer, Sir John Graham 

 Dalyell, whose merits can scarcely be too highly estimated, 

 described and figured in 1848 f a form called Beroe bilobata, 

 which he associated with the Eucharis Tiedmanni of Esch- 

 scholtz, thus correctly appreciating the relationship of a species 

 apparently identical with the present (Lesueuria vitrea). 

 He procured eight small specimens in August and two larger, 

 1^ inch, in the same month and in February, probably in the 

 Firth of Forth. Michael Sars, again, found it somewhat 

 later (1856) off the Norwegian coast. 



Young Lesueurice, f inch in long diameter, appeared in 

 April, while in May they occurred in great numbers, indeed 

 forming the most conspicuous feature in the pelagic fauna. 

 In June they were almost as numerous, ranging from yV inch 

 or less upwards, and mainly frequenting midwater. Lesueuria 

 was not quite so frequent in July, but occasionally occurred in 

 multitudes, both large and small examples being present in the 

 midwater-net, the latter specimens being a little over 2 inches. 

 Many at this time showed ova measuring '016 to "0083 inch. 

 In August the average size is larger than in the previous 

 months, though the numbers are less. Few were procured in 

 September and October, but in November and December they 

 were occasionally captured from | to 1^ inch in diameter. 

 The older forms appear to spawn in July and gradually die 



* Ann. & Mag. Nat. Hist., December 1888. 



•j- ' Rare and Remarkable Animals,' ii. p. 2. f >4, pi. liv. figs. 4, 5, 6. 



