412 bullion. 



Locli Fyne and west of Scotland (Barlee, Alder, and 

 J. G. J.) ; Banff (Edward, fide Gordon) ; Aberdeen- 

 shire (Dawson) ; Wick (Peach) ; Shetland (Barlee and 

 J. G. J.). It is somewhat rare. Coralline Crag at 

 Sntton (Wood) ; black or lower Crag at Antwerp 

 (Nyst) ; Dax (Gratelonp) ; Italian tertiaries (Soldani, 

 Brocchi, Cantraine, Philippi, and Calcara). Inhabiting 

 the coast of Norway (Danielssen, 40 f., and Lilljeborg) ; 

 Sweden (Loven, and Malm who fonnd this species and 

 Mytilus Adriaticus living together in 12 f.) ; Gibraltar, 

 20 f. (M f Andrew) ; both sides of the Mediterranean, in 

 many places, at depths of from 20 to 35 f. (Plancns and 

 others) • Adriatic (Chiereghini, v. Schrockinger, and 

 Brusina) ; iEgean, 40 f. (Forbes). 



Loven has examined the animal, and ascertained that 

 it is undoubtedly a Cylichna. The shell differs 

 generically from Ovula in the mouth not being channelled 

 or open at the upper end. 



It appears to be the type of De Montfort's genus 

 Rhizorus, founded on the Nux marina minuscula of 

 Soldani, and named by the former R. Adela'idis. 

 According to Nardo it is the Bulla fucicola of Chiere- 

 ghini. Not B. acuminata of the ' Mineral Conchology/ 

 which is a Barton fossil. 



2. C. niti'dula*, Loven. 



C. nitidula. Lov. Ind. Moll. Scand. p. 10 ; F. & H. iii. p. 515, pi. cxiv. c. 

 f. 6. 



Body clear white. 



Shell oblong and somewhat elongated, attenuated behind 

 or towards the top, thin, semitransparent, glossy and slightly 

 iridescent : scidpture none, even under the microscope ; lines 

 of growth extremely slight, forming wrinkles towards the top : 

 epidermis inconspicuous: colour clear white: mouth, narrow 

 above and in the middle, and wide at the base, where it is 



Rather glossy. 



