330 lOURNAL OF CONCHOI.OGY, VOI,. 13, KO. It, JULY, igi2. 



Now, C. ovata JefF., as figured in the 'Challenger' Report, is an 

 Atlantic species from very deep water, whereas the C. conulus of 

 " British Conchology," on which this species was founded, is " a 

 single specimen from Deal Voe, Shetland, about lof." The former 

 is very thin and egg-shaped, with the smaller end truncated ; the 

 latter is longer, more conical, and rather solid. And I think Gwyn 

 Jeffreys has most probably been too hasty in uniting these two forms 

 as one species ; that it will be found that Sars', Wood's, and the 

 "British Conchology" species are identical, and that they are distinct 

 from C. ovata of the 'Porcupine,' the 'Challenger,' and of Seguenza. 



C. cylindracea Penn.— St. Mary's Sound, Scilly, 35f, a small 

 form rather plentiful in one particular dredging, with C. nitiJula; it 

 is otherwise a scarce shell in the Channel and Scilly Islands. Fossil 

 in the Belfast deposit (Praeger) ! 



The largest come from Tenby, Laugharne, and Pendine, where 

 they attain the dimensions given by Jeffreys, six lines by two ; but 

 this is unusual, the normal size being four lines by one. The fry 

 are extremely curious ; they consist of three whorls, and resemble a 

 Limacina ; these three apical whorls afterwards become wholly 

 enveloped by the outer lip in a hollow chamber, in which it is 

 arranged at right angles to the axis of the shell, as in typical 

 Odostomm. In the first stage of the perfectly formed shell, the 

 cylinder is expanded at the top to make room for the embryonic 

 whorls ; it afterwards becomes more thickened and uniform below, 

 until in the adult the cylinder is the same breadth throughout. 



C. alba Brown. — East Shetlands (Simpson) ! off the Butt of 

 Lewis iSgf. and 53of. ('Lightning' and 'Knight Errant'); North 

 Shetlands 345f. ('Porcupine') ; Shetland-Faroe Channel 5i6f and 

 57of. ('Triton'). 



var. corticata Beck. — About 20 miles N.E. of the Shetlands 

 .1 1 if. (Simpson) ! 



Utriculus mammillatus Phil. — Scilly Islands (Smart and others), 

 more plentiful than elsewhere ; Freshwater West ; Bantry Bay ; 

 Penttand Frith 35f. ; W. Orkneys 45f 



The sculpture of this species is visible only with a Coddington lens. 

 The papillary apex often projects beyond the apical rim, and in a few 

 cases the next whorl also, while a monstrous form has the whole 

 spire extruding, as in U. obtusus var. lajonkaireana. Jeffreys' figure 

 shows the apical nipple sunk below the level of the upper rim of the 

 shell, while in Sowerby's it is projecting, as in the majority of speci- 

 mens ; the latter form is var. apice-prominido Monts. 



U. truncatulus Brugui. — Fossil in the Belfast deposit (Praeger) ! 



