294 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



of Laminaria and other large Algae, in shallow water, around 

 the south end of the Isle of Man. Some of the colonies 

 found were beautifully variegated with violet. 



It was obtained near Spanish Head, near Port Erin, and 

 at Bay-ny-Carrickey, at low water mark. 



Leptoclinum candiduiiif Savigny (?) . 



Didemnum candidum, Sav., Mem., p. 194. 

 Leptoclinum candidum, Delia Valle and von Drasche. 



A smooth pure white species of Leptoclinum, which is 

 common under stones near low water and in tidal pools, may 

 possibly be identical with this species, which has been found 

 in the Gulf of Suez, the Bay of Naples, and the Adriatic. It 

 seems to be distinct from the known British species. 



Leptoclinum asperum, Milne-Edwards. 

 This species is common under stones, near low water 

 mark, and attached to Algae, at Bay-ny-Carrickey, and near 

 Port Erin, Isle of Man. It varies considerably in colour and 

 thickness. 



Family. — Diplosomid^. 



Diplosonia punctatum, Forbes. 



Leptoclinum punctatum, Forbes, Brit. Moll., vol. i, p 18. 



The species which was described in 1850 by Forbes 

 under the name of Leptoclinum punctatum, from specimens 

 which he had obtained at the Isle of Man, is probably a 

 Diplosoma, but whether it is a distinct species, or is iden- 

 tical with one of the other known forms of that genus, it is 

 impossible to say from Forbes' brief description. Possibly 

 it may be Giard's Diplosoma crystallinum, which is common 

 on some parts of the west coast, or it may be the species 

 described as a Polyclinum by Lister, in 1834, and afterwards 

 named Leptoclinum listerianum by Milne-Edwards. The 

 species of this genus require to be carefully revised. 



