MARSHALL: ADDITIONS TO “ BRITISH CONCHOLOGY.” 389 
breadth. These large specimens are usually abraded ; but 
some beautiful specimens from ‘Tenby, about 8 in. in 
breadth, are perfect in this respect. 
During a very low spring tide at Cumbrae, Mr. David 
Robertson found three living specimens fixed upright in 
the sand, with about an inch anda half of the shells ex- 
posed, to which two or three mussels were attached in 
each case, so as to completely prevent the Solens_ slip- 
ping down their burrows. 
S. vagina 1.——St. Aubin’s Bay, Jersey, abundant and col- 
lected for food. It is also eaten in some parts of Devon- 
shire, though \S. se/gua is the species usually brought to 
the markets. My largest, from Guernsey, is 6} in. by 1 in. 
Pandora inzequivalvis L..—Off Teignmouth, a dead speci- 
men; Weymouth Bay ; Studland Bay. 
The monstrosity recorded in “ British Conchology ” 
occurs at Jersey and Guernsey. 
Lyonsia norvegica var. elongata Gray.—Tenby (Span) !; 
Loch Boisdale, 35 f. (Somerville and J.T.M.) ; Clyde, 18 f. 
Thracia preetenuis Pult.—Scilly (Smart and others). 
T. papyracea Poli.—Guernsey, rare. 
Var. gracilis Jeff—Front margin straight. Pendine; cff 
Tarbert, 16 f.; Doggerbank, 4of. A corresponding form 
occurs in the var. wil/oseuscula. 
Var. villosiuscula Macg.—Smaller ; beaks nearly central 
and more prominent. St. Mary’s Sound, Scilly (Burkill 
aacla |e Vi) 
The young of this variety do not resemble the adult ; 
they are considerably inequilateral, and obliquely and 
abruptly truncated at the posterior end. 
The largest type specimens come from Pendine, and 
are 14 in. by #in.; the largest of the var. wil/ostuscula 
from Guernsey, 1} in. by @ in. 
T. pubescens Pult.— Campbelltown Loch, a fresh valve 
(Robertson) ; Babbacombe Bay ; Plymouth Sound. 
