338 JOURNAL OF CONCHOLOGY, VOL. 9, NO. II, JULY, I9CO. 



dredged by the "Porcupine" in the same region in 251 f., in the 

 Atlantic off Scilly in 539 f., and some other parts of the Atlantic and 

 Mediterranean. This is very like a stumpy O. conoidea, having the 

 same apex, keel, and texture, and, like that species, varying in the 

 convexity of the whorls and occasional absence of the basal keel, but 

 the aperture is never grooved. Although Jeffreys says it has no 

 umbilicus or chink, there is frequently a small but distinct perforation. 

 Jeffreys' figure in the " Lightning" Report is a very good one, but the 

 shell embraces a certain amount of variation. Should more specimens 

 be dredged hereafter within sight of our coasts, it will make an 

 interesting addition to the British list. 



O. lactoides Monts. which has been recorded by me from the 

 English Channel 1 I now find on further examination to be 

 O. magnified Seg. This handsome shell possesses "a character 

 common and peculiar to all the specimens (European, American, and 

 Fossil) which I have examined, viz., the close striation length-wise by 

 delicate and microscopical lines which cover the whole of the shell. 

 These striae are not mere marks of growth, but a distinct kind of 

 sculpture." 2 Gwyn Jeffreys, however, has failed to notice that this is 

 a character also shared by O. compressa Jeffr. and O. paucistriata Jeffr. 



Ianthina rotundata Leach. — There is no authentic record of this 

 or of any other species of Ianthina having been taken alive in our 

 seas ; but Miss Hockin, of Hayle, many years ago sent me baby 

 specimens of this species which she found there " washing in alive in 

 the January following the November in which she found large ones," 

 and she thinks they " first lived [were born] in these waters." 

 Certainly, adult Ianthintz are never wafted to these shores in January, 

 but always in the latter half of the year. 



A fleet of I. communis were cast ashore at Islay in summer 1883. 



Stilifer turtoni Brod. — Aberdeenshire (Simpson) ! Land's End ; 

 Falmouth ; Fowey ; Eddystone. 



This species has a considerable range of variation in shape and 

 proportions, but there are two principal forms, which may indicate the 

 sexes — one similar to that figured by Sowerby and Jeffreys, which is 

 the type ; the other, not quite so numerous, which is more or less 

 oblong, in consequence of the spire being longer and the body-whorl 

 smaller. The stiliform apex is not always erect as depicted in the 

 figures, but declining at various angles, and in some cases prostrate. 

 Keeled striae often encircle the body-whorl, especially the lower half, 

 and it is also occasionally malleated. Outlines of the extreme forms 

 will be found iny. Conch., vol. 8, p. 176, 1896. 



1 /. Conch., vol. viii, p. 433, 1897. 



2 Moll. "Lightning" and "Porcupine," Proc. Zool. Soc, 1884, p. 357. 



(To be continued). 



