54 BURKILL AND MARSHALL: MARINE SHELLS OP SCILLY. 



Two new varieties appear in the following list which are 



additions to the British fauna — Cerithiopsis tubercularis var. 



albescens Marshall ; and Philine scabra var. circa Marshall. 



It may be interesting to add that Helix revelata occurred 



at the roots of grass on the cliffs near the sea at St. Mary's. 



Argiope decollata Chem.— Noticed fully in the last number 

 of the Journal. 



A. cistellula S. Wood. — Menavawr. Valves only. 



Modiolaria discors L.— St. Mary's, in dwarf weeds between 

 tide-marks. 



Galeomma turtoni Ed. Zool. Jour. — Menavawr. Smart and 

 Cooke in their Supplement record one valve, and another 

 occurred to Mr. Burkill. These valves had probably 

 drifted from shallow water. 



Lepton sulcatulum Jeff. — Menavawr and Muncoy Neck. 

 A dozen perfect specimens and many valves. This species 

 has hitherto been considered peculiar to the Channel 

 Islands (excepting its foreign stations), where it lives at 

 low-water mark in dwarf seaweeds. 



L. clarkiae Clark. — Menavawr. Valves only. 



Montacuta dawsoni Jeff.— Menavawr. A single valve, 

 but unmistakable. Although this shell is a comparatively 

 recent discovery, found by the late Mr. Dawson in the 

 Moray Firth, 1 am able to record it from four additiona 

 localities — Donegal, Bartra Island in Killala Bay, Torbay, 

 and now Scilly. I also found it not uncommon in dredgings 

 from the coast of Greenland obtained during our last 

 Arctic Expedition in 1875. 

 Tellina balaustina L.— St. Mary's Sound. A fine valve in 



fresh condition. 

 Amphidesma castaneum Mont. — Menavawr, Muncoy, and 

 St. Mary's Sound. Valves are plentiful about the Land's 

 End and at Scilly, but the two first-named localities are 

 notable as having yielded from each place a perfect adult 

 example. 



J.C, vL, Jan., i88g. 



