MARSHALL: ADDITIONS lO "BRITISH CONCHOLOGY." 327 



the one as tripuiictata and the other as iinmaiiilnla, while Montagu 

 described the spotted one as C. europcea and the plain one as C. 

 arctica. At Guernsey and Herm, where great numbers are collected 

 for ornamenting boxes, they are known by the expressive name of 

 " negro-heads." 



var. minor Marsh., Jonrn. of Co?uh., 1893, vol. vii., p. 263. — 

 Dredged in the coralline zone. Guernsey 2of., Killala Bay and Achil 

 Island, Barra 4of. Figured in ' Crag Mollusca ' (vol. ii., pi. ii., fig. 6). 

 There is another form living in the littoral zone which is intermediate 

 in size between this and the type. 



C. moneta has been found on the shore at Jersey by Mr. Sturges 

 Dodd, on the beach at Seascale, Cumberland, by the Rev. Charles 

 Crawshaw, and at Tresco by Mr. Tomlin. It is an e.xotic species. 



Ovula patula Penn. — Scilly (Smart and others;; Wexford coast 

 4of. (Walpole) ; Killala Bay. Very young shells have a prominent 

 spire, which gradually becomes enveloped by the formation of the 

 upper canal. The embryo is very similar in form and sculpture to 

 that of Clathurella, and consists of three convex whorls transversely 

 reticulated. 



Bullidae Clark. — Canon Norman prefers to substitute Tornatina 

 A. Ad., without explanation, for the well-known name Utriculus 

 Brown. ^ The latter dates from 1844, and the former from 1850, so 

 that on the ground of priority alone the change was undesirable. He 

 has also included in it two species which are usually considered 

 Cylichna {nitidula and umbilicata), while for C. acuminata he revives 

 Volvula of Adams, although there is a prior genus of Volvulus^ in 

 addition to which " Loven has examined the animal and ascertained 

 that it is undoubtedly a Cylichna."" Then, for other species of 

 Utriculus^ he resuscitates the genus Diaphana Brown, in this follow- 

 ing G. O. Sars, whereas Gwyn Jeffreys says that besides being an 

 objectionable name. Brown himself cancelled Diaphana in favour of 

 Utriculus f while Boog ^Vatson makes Volvula a sub-genus of 

 Cylichna, Tornatina he makes a sub-genus of Utriculus, and in regard 

 to Diaphana he writes: — " G. O. Sars rejects Loven's name of 

 Amphisphyra in favour of Diaphana Brown ; but this latter name 

 was cancelled by its author in favour of Utriculus, and it is obviously 

 impossible to accept both, as Professor Sars has done."^ 



Cylichna acuminata Brugui. — Generally, but sparingly, dis- 

 tributed, in sand more or less muddy, in 10 to go fathoms. Off 

 Berwick (Howse) ; Tan Spit, Cumbrae, locally abundant, Mr. Alfred 



1 Ann. Mag. N. Hist., i8go, vol. vi., p. 63. 



2 ' Brit. Conch.,' vol. iv., p. 412. 



3 Op. cit., p. 41Q. 



4 ' Challenger' Gastropoda, p. 646. 



