66 JOURNAL OF CONCHOLOdY, VOL. 9, NO. 3, JULY, 1898. 



points in connection with the subject, and though both of them 

 decide for Acmcea,\t is one of those cases in which everyone is largely at 

 liberty to please himself, and I make no apology for retaining the 

 name so long used by British conchologists. 



T. testudinalis Mull. — Isle of Man (Archer) ; Llandudno (Tom- 

 lin) ; Fleetwood (Heathcote) ; Doggerbank and Scarborough. This 

 species would appear to be still migrating southward. It is occasion- 

 ally of a uniform dark brown. I have specimens from the North 

 Pacific 2-J inch by if inch. 



Var. pallida Verkrz. — Girdleness, near Aberdeen (Simpson) ! 



T. virginea var. conica Jeffr. — Higher and rounder ; position of 

 apex as variable as in the type. This variety is usually dredged, bu 

 conical specimens of the type are occasionally found between tide- 

 marks. 



Var. lactea Jeffr. — Kincardineshire (Simpson) ! Gorran, Corn- 

 wall (Couch) ; Herm Island. 



Jeffreys writes 1 "that the position of the apex is very variable, 

 and that an adult specimen dredged by Admiral Acton in the Bay 

 of Naples, in 60 f, has a spiral and persistent apex or nucleus"; 

 but the nucleus is usually shed at a very early age, and the apex 

 in young specimens shows a slight depression caused by the shedding 

 of the embryonic spire. 



There is some doubt as to the correctness of the Mediterranean 

 record. The Marquis di Monterosato contends that the Mediter- 

 ranean shell is not Midler's species, while Jeffreys maintains that 

 Lottia unicolor Forb., which is Mediterranean, is only a synonym of 

 T. virginea, and is not Gadinia gussoni O. G. Costa. 



Lepeta fulva Mull. — See/. Conch, vol. 8, p. 30, Jan., 1895. 

 Var. expansa Jeffr.— Gairloch, 30 f. ; Loch Inver, 25 f. ; Loch 

 Boisdale, 35 f. (Somerville and J. T. M.). Equally variable as 

 Tectum virginea in shape and height. 



L. ca^ca Mull. — Loch Fyne, a dead specimen (Coll. Mac Andrew); 



Kyles of Bute, 18 f. ; another dead specimen. Mr. Frank Coulson, 

 of Glasgow, has a specimen dredged alive in the Hebrides or East 

 Shetlands, he is not sure which, but he has never dredged outside 

 British waters. 



Propilidium ancyloides Forb. — Shuna Island and Lynn of 

 Morven, in Loch Linnhe, 27 — 50 f. (Knight) ! Sound of Sleat, 30 — 

 90 f, and Loch Boisdale, 35 f. (Somerville and J. T. M.) ; Clyde, 

 18 f. ; Lamlash, 20 f. ; Oban, 25 f. Also in the British Channel, 

 690 f. (Porcupine) ! 



1 Proc.-Zool, Sac, Nov. 1882, p. 671. 



