Prof. E. Forbes on some Additions to the British Fauna. 413 



4. A large Natica, which, if not distinct from Natica monilifera, \ 

 has at least claims to be ranked as a marked variety of that spe- 

 cies. It inhabits deeper water than the usual form, having been 

 met with in various depths from 12 to 50 fathoms (off the coast 

 of Wales). It wants the usual spots and markings of monilifera, 

 has the upper margin of the whorls, especially in the older spe- 

 cimens, depressed or grooved, and above all is covered by an 

 epidermis. 



In other characters however it so closely resembles N. moni- 

 lifera, that an observation of the characters of the animal (which 

 is of great specific importance in this genus) will be required be- 

 fore we may pronounce with certainty on the specific value of the 

 form. v/ 



Besides the above, Mr. MacAndrew has met with in the seas 

 of the Hebrides the Cyprina triangularis of Montagu, the Chem- 

 nitzia fulvocincta {Turritella, sp.) of Thompson, and the Pleuro- 

 toma Boothii of Smith. The Pecten Landsburgi has also been 

 met with by him in considerable numbers. It is the shell which 

 Mr. Jeffreys named (but without a description) " Pecten acu- 

 leatus" in Sowerby's ' Malacological Magazine/ The Pecten 

 tigerinus and the P. striatus of Muller appear to be identical 

 with the two varieties of this species, and one of those names 

 should be adopted for it on the ground of priority, as should 

 Mulleins P. triradiatus for our obsoletus. It is to be regretted 

 that Mr. Jeffreys, who has been a most successful and enter- 

 prising collector of British Marine Testacea, does not make 

 known from time to time his discoveries : describing such as are 

 new, for mere names without descriptions cannot be admitted in 

 any department of natural history, and only tend to confuse and 

 mislead. 



EcHINODERMATA. 



Mr. MacAndrew has taken in the Hebrides that remarkable 

 creature, the Holothuria squamata of the ' Zoologia Danica/ an 

 animal which will probably form the type of a new genus. I 

 have not yet had time to examine structurally the specimens which 

 he has put into my hands, and content myself for the present with 

 the bare announcement of this important addition to the list of Bri- 

 tish animals. In a note from Mr. Alder, that gentleman informs 

 me that it has also been taken on the Scottish coast during 

 this summer by Mr. Jeffreys. 



ZOOPHYTA. 



Pavonaria quadrangularis. 



At the British Association I announced as new, under the name 

 of Virgularia quadrangularis, a most remarkable Asteroid zoo- 

 phyte dredged by Mr. MacAndrew on the west coast of Scotland. 



