of British Mollusca. Q5 



under Cylichna umhilicata, he writes : — " Var. conulus^ Loffo- 

 den L, 300 f. (Sars), not var. conulus of WeinkaufF, which he 

 has since named C. Hoernesi ; this is C. pyramidata of A. 

 Adams." It appears probable from the words ^' Norwegian 

 and Mediterranean " in the first of these quotations that he 

 there used C. pyramidata for the shell we now understand as 

 Tornatina ovafa, Jeffr., whereas in the second he makes 

 C. pyramidata synonymous with the shell I have above 

 spoken of as Cylichna {Bulla) striatula, Forbes =0. Hoernesi, 

 Weink.] 



Genus 2. Volvula, Adams. 



35. Volvida acuminata (Brugui^re). 



Off Berwick {R. Howse in Newcastle Museum). This is 

 the only instance of its occurrence off the east of England. 



Fam. 3. Scaphandridse. 

 Genus 1. Cylichna, Loven. 



36. Cylichna cylindracea (Pennant). 



Var. linearis, Jeffreys. 



37. Cylichna alba (Brown). 



At the time when ' British Conchology ' was published 

 the only known British locality for this species was north- 

 north-west of Unst, Shetland, where JeftVeys and myself 

 dredged it on several occasions. It has since been found 

 north-north-west from the Butt of Lewis in 189-530 fathoms 

 (' Lightning,' Stats. 12, 13) ; off the west of Ireland in 430- 

 1366 fathoms ('Porcupine,' 1869, Stat. 23a, 19); near the 

 same ground as by the ' Lightning,' in 530 fathoms (' Knight 

 Errant,' Stat. 7). 



Genus 2. DiAPHANA, Brown, 1833 

 =Amphisphyra, Loven, 1846. 



38. Diaphana hyalina (Turton). 



39. Diaphana expansa (Jeffreys) . 



40. Diaphana vent?-osa (Jeffreys). 



41. Diaphana ylobosa {hov6n) . 



Utriculm ylobosus, Jeffrej'S, Brit. Concli. vol. v. p. 223, pi. cii. tig. 8. 

 Diaphana globosa, G. O. Sars, /. c, p. 290, pi. xviii. figs. 4 and 3 c. 

 Diaphana hrfemalis, G. 0. Bars, I. c. p. 2L)1, pi. xviii. fig. 4. 



Ann, & Mag. N. Hist. Ser. 6. Vol. vi. 5 



