MARSHALL: ADDITIONS TO "BRITISH CONCHOLOGY," 335, 



in compliment to J. R. le B. Tomlin, Esq., of Lakefoot, Reading, 

 into whose hands the specimen has now passed, with my collection. 

 I have also a specimen of an undescribed species from the Christiania- 

 fjord, loof., which is somewhat like a young U. ventrosus in shape, 

 but has a different crown and pillar. 



U. expansus Jeff. — This is another very rare Shetland species, 

 to which I am able to add N.E. Shetlands iiif. ; also a specimen 

 off the Faroes in 85f (Simpson) ! S.W. Ireland 4of (R.I. A. cruise) ! 

 Scilly Islands 30-4of. (Burkill and J.T.M.); Land's End, Caldy 

 Island, and Bartra Island. It was also dredged in the ' Porcupine ' 

 Expedition off the West of Ireland in 67of, and North of the 

 Hebrides in 542f. 



The shell has a peculiar frosted appearance, which appears either 

 in broad spiral bands or in blotches. Two of my Irish specimens 

 have a clear white band encircling the periphery, as may be seen in 

 various species of Philine. Jeffreys' figure conveys a wrong impres- 

 sion of the shell ; the body-whorl should be shorter and broader, 

 the pillar should be straight, sharp at the base, and the outer lip 

 should be more inflated and describe a half-circle. Sowerby's figure 

 is a copy of this with the faults emphasized. It was perhaps owing 

 to these misleading figures that the Marquis di Monterosato described 

 the same species as U. quadratus} Jeffreys' dimensions are more 

 than double those of any of my specimens (about a score) ; the 

 latter are nine lines in length by eight in breadth, they are more 

 globular than his figure, and show the apex more or less above the 

 crown. 



U. hyalinus Turt. — Scilly Isles (Smart and others) ! Mayo 

 and Sligo (Miss Warren) ! Guernsey 2of., very rare ; Southport, 

 Skegness, Whitby, Doggerbank, Bantry Bay, Connemara, Portrush, 

 North and East Sutherlandshire, Barra, and West Orkneys. 



As in U. obtiisiis, this varies in the protrusion of the apex and 

 length of the aperture. A more globose form is distributed generally 

 with the type, and some of these, having the aperture level or even 

 higher than the crown, may be mistaken for U. expansus. Another 

 form is constricted in the centre. The colour is clear white in dead 

 specimens, but a light horn-colour when living. 



Sowerby gives a good figure ; Jeffreys' does not exhibit the apex, 

 and the pillar-fold and umbilicus are much too prominent. The 

 dimensions of both figures are too large, indicating two lines in length; 

 the usual size is only half that. I have a couple of specimens from 

 Glenelg, Skye, which are two lines long, but these are altogether 

 exceptional. 



U. globosus Lov. — St. Magnus Bay, Shetlands, 6o-8of, on a 



I Journ. de Conchyl., 1874, P- ^S"^' 



