RISSOA. 11 



This is the Turbo cimex of Donovan, Montagu, and 

 other conchologists (but not of Linne), R. crenulata of 

 Michaud, and Persephona Hutchinsiana of Leach. The 

 R. lactea of Michaud having been previously described 

 by Lamarck as Turbo cancellatus (but subsequently to 

 DaCosta^s publication), we must either call that species 

 cancellata and give up the name lactea, retaining crenu- 

 lata for the present species, or else adhere to the strict 

 rule of priority. Convenience, as well as justice, makes 

 the latter alternative more desirable. R. cancellata of 

 Desmarets is the Linnean R. chnex, which (as Turbo 

 calathiscus of Montagu) Mr. Thompson of Belfast 

 seems to have mistaken for the species now described. 



4. R. ca'lathus^, Forbes and Hanley. 



B. calathus, F. & H. iii. p. 82, pi. Ixxviii. f. 3. 



Shell more conical and coarsely sculptured than the next 

 species {R. reticulata) ; longitudinal striae more prominent ; 

 penultimate whorl not quite so broad in proportion to the body- 

 whorl, and having usually but 4 rows of spiral striae — although 

 this last character is not constant, there being sometimes 5 and 

 even 6 rows. Colour, size, and other particulars the same as 

 in R. reticulata. 



Habitat: Guernsey and Herm; rather common. 

 Land's End (Hockin) ; Whitesand Bay (Mrs. Flack) ; 

 off Penzance, 15-20 f. (M^Andrew and Forbes) ; Shell- 

 ness, Kent (J. G. J.); off the Mizen Head, 50 f. (M^An- 

 drew); Kilkee, co. Clare (Warren, ^c^e Thompson); Isle 

 of Man (Packe) ; co. Antrim (Hyndman and J. G. J.) ; 

 Clyde district (Smith and Landsborough) ; Loch Car- 

 ron (J. G. J.) ; Hebrides (Barlee). Coralline Crag at 

 Sutton (S. Wood, as R. abyssicola). Drontheim, 5-40 

 f., and Vigo (M 'Andrew) ; Morbihan (Tasle) ; Gulf of 



* A wicker basket. 



