134 JOURNAL OF CONCHOLOGY, VOL. 9, NO. 5, JANUARY, 1899. 



Sound of Sleat, 60 — 90 f. (dwarf); Loch Boisdale, 25 f. ; and Barra, 

 40 — 53 f. (Somerville and J.T.M.); Eddystone ; Southport; Skegness; 

 Connemara ; Portmarnock ; Vidlin Voe, Shetland, 18 f. 



Rare everywhere except in Torbay and Babbacombe Bay, whence 

 specimens are occasionally dredged nearly two lines in length. This 

 and the next cannot be the male and female of one species, as in that 

 case the two would always be found together, which is not my experi- 

 ence. Both forms keep very true, and there are no intermedate links 

 between them. Sowerby's figure exhibits longitudinal stria?, which is 

 incorrect ; the shell has no trace of them. 



R. vitrea Mont. — In similar localities and depths as the last 

 species, but affecting more muddy ground. Scilly Isles, 20 — 40 f. 

 (Smart and others) ; from stomach of grey mullet from Norfolk coast 

 (Norwich Museum); Barra, 30 f. (Somerville and J.T.M.); Guernsey, 

 20 f. ; Lancashire coast ; Stornoway. 



The suture of the last whorl is remarkably deep, with a tendency 

 to become disconnected in aged specimens. Others have a longer 

 and more slender spire, and there is a dwarf form, but it is scarce. 

 Living shells are generally coated with a black and persistent muddy 

 deposit, sometimes no part of the shell being visible. It is scarce 

 everywhere in Britain except at Bantry Bay and on the Lancashire 

 coast. Fossil in the Belfast deposit, fine specimens two lines in 

 length (Praeger) ! 



R. pulcherrima Jeffr. — This shell varies in length of spire and 

 breadth of base, also in the colouring, which is generally obscure and 

 sometimes altogether wanting ; the latter is var. concolor Bq. It is 

 often encrusted with Melobesia, and aged specimens have a con- 

 spicuous umbilicus. Instead of being " very beautiful," as its name 

 implies, it is a most insignificant shell in every way ; the colouring is 

 best seen on dead opaque examples, but it is never conspicuous, and 

 many specimens require a high power to see the spotted markings 

 even when present. Sowerby figures the type form well, but Jeffreys' 

 is a more slender form, which occurs in the proportion of twenty 

 per cent. 



Var. pellucida Marsh. {J. Conch., vol. 7, p. 252). — Guernsey, 

 Sark, and Herm. 



R. fulgida Ad. — Scilly Isles, living in weeds and dredged dead 

 (Burkill and J.T.M.) 



Var. pallida Jeffr. — Jersey and Guernsey ; Torbay. 



This mite of a shell is solid for its size, and the ground colour is 

 light to dark reddish brown, with two darker bands on the body-whorl, 

 two on the penultimate (one just below the suture and the other at 

 the junction of the body-whorl), and one band on the next, in the 



