SLABBERIA HALTERATA, 53 



of tentacula, Both these species of Sars are from the coast of Norway, and will very pro- 

 bably be found hereafter in Zetland and on the coast of Scotland. 



Plate X, fig. 2, a, represents the Thaumantias lucifera of the natural size ; 2, b, as seen 

 from above ; and 2, c, in profile, much magnified ; 2, e, the Stomach ; and 2,/> its mouth ; 

 2, g, one of the tentacles with its bulb and vesicle ; 2, d, an ovary. 



The name Thaumantias lucida has been adopted by Lesson for Macartney's animal, 

 under the impression that the latter was intended to be distinct from T. hemisphcerica. 



17. Thaumantias punctata, Forbes (1841). 



Plate X, Fig. 1. 



E. Forbes, in Annals of Natural History, vol. vii, p. 85, pi. 1, fig. 5 (1841). 



The last of the species of Thaumantias which I have to describe, is one of which I gave 

 an account some years ago in the 'Annals of Natural History,' under the name of Thaumantias 

 punctata. 



The umbrella is hemispherical, and rather depressed, smooth, and colourless. Its margin 

 is bordered by thirty-two filiform, colourless tentacula, each with a rather swollen bulbous 

 base, marked by a dark, almost black, ocellus. The sub-umbrella is convex, and divided into 

 four parts by the radiating vessels which traverse, on its lower half, four short, linear, purplish 

 ovaries. The stomach is very small, and purplish. It terminates in four short lips. This is 

 a large species, measuring nearly an inch in diameter. It occurred abundantly off the Isle of 

 Man, where it was taken in the month of June, 1839, by Professor Goodsir, Mr. Henry 

 Groodsir, and myself. I regret not having encountered it since, as it requires to be submitted 

 to more minute observation than time then permitted. 



Plate X, f . \, a and h, represents this species magnified, in profile, and seen from above ; 

 c, is the stomach ; and d, a tentacle with its bulb. 



Genus XII. Slabberia, Forbes (1846). 



Umbrella campanulate ; ovaries four, linear, in the course of the four simple, 

 gastro-vascular canals ; peduncle proboscidiform, highly extensile, oral orifice 

 circular; a marginal tentacle springing from an ocellated bulb, and terminating 

 in a coloured globular body, placed opposite each of the gastro-vascular canals. 



-Slabberia halterata^ Forbes. 

 Plate VI, Fig. L 



Umbrella deeply campanulate, smooth, colourless ; sub-umbrella large, divided into equal 

 parts by four simple vessels, which open into a circular marginal vessel. On the upper third 

 of the sub-umbrella are seen in the course of the vessels four small linear ovaries or reproductive 

 glands, pointed at each end. The border of the general cavity is provided with a shelf-like 

 veil. The tentacula are strong, four in number, and colourless, except at their bases and lips. 



