CYLICHNA. 413 



expanded and rounded : outer Up gently curved ; the upper 

 part projects beyond the apex or crown ; this latter part is 

 considerably contracted, and encircled by a solid rim, and it 

 exhibits a very small opening through which part of the 

 involute spire is indistinctly visible : inner lip usually slight, 

 but thickened in older specimens, a little reflected below: 

 pillar short, and furnished with a small slight tooth-like fold 

 near the base ; it is somewhat curved to the left. L. 0*125. 

 B. 0-06. 



Habitat : On the same kind of sea-bottom as the 

 last species, in 30-50 f., Loch Fyne and the west coast 

 of Scotland (Barleeand J. G. J.) ; off Lame, co. Antrim, 

 and outside the Dogger bank (J. G. J.) ; Berwick Bay 

 (Johnston, as Bulla umbilicata) ; Banff (Edward,/^ Gor- 

 don); Aberdeenshire coast (Dawson) ; Shetland (Barlee 

 and J. G. J.). It is more local than rare. Danielssen 

 records this species as Norwegian, and L oven, Malm, and 

 Lilljeborg from the south of Sweden : depths 12-40 f. 



3. C. umbilica/ta"*, Montagu. 



Bulla umbilicata, Mont. Test. Br. (i.) p. 222, t. 7. f. 4. C. umbilicata, 

 F. & H. iii. p. 519, pi. cxiv. c. f. 8, 9. 



Shell oblong, not so much attenuated behind as the last 

 species, more solid, nearly opaque, and glossy but not pris- 

 matic: sculpture, slight and sometimes wavy spiral striae or 

 impressed lines, which vary in strength and remoteness on the 

 body, and are more or less close-set near the base ; they 

 are visible in fresh specimens by means of a low magnifying- 

 power, but are not easily observable in rubbed specimens 

 picked out of drift sand : epidermis brownish-yellow, liable to 

 peel off : colour creamy, becoming bleached and white in dead 

 shells : mouth somewhat open at the top, contracted and 

 narrow in the middle, pear-shaped and wide at the base, 

 where it is expanded and rounded : outer lip gently curved ; 

 the upper part is obliquely truncated, but it does not project 

 so far beyond the apex or crown as in the last species : apex 

 twisted and somewhat contracted, encircled by a solid white 

 rim (periomphalus, Loven), and exhibiting a perforation in the 



* L' mbilicate, or provided with a navel. 



