MARSHALL: ADDITIONS TO ‘‘ BRITISH CONCHOLOGY.” 343 
C. pellucida Jeff.—Dr. Jeffreys found two perfect speci- 
mens and a valve at Guernsey; but the Marquis de 
Monterosato subsequently found it in abundance at 
Palermo, in mud at 30—-90 metres, and described it as C. 
pellucida Jeff.t In a subsequent letter he tells me he thinks 
this little shell may be assigned to Jeffreys’ genus Glomus. 
I have often dredged the fry and young of C. rhoméea, 
which is shaped almost exactly like the adult, and cannot 
be mistaken. C. pellucida, on the other hand, is a very 
minute oval shell, and differs from the fry of C. decussata in 
being oval instead of round. A figure of it will be found in 
Sowerby’s ‘ Index,’ pl. viii., fig. 14. 
C. decussata Mont.—Groomsport, co. Down. Foéssil in the 
Belfast deposits (Praeger) ! 
Nucula nucleus L.—Low water in the Channel Islands, 
double the size of those dredged off the coast. 
N. tenuis var. inflata Hanc.—Loch Long, 24 f. (Knight) ! 
N. corbuloides Seg. was taken in the ‘Porcupine’ Expedition 
of 1869 in the Atlantic off the south and west of Ireland, 
and in the Atlantic off Scilly ; it is figured in Sowerby’s 
Index. It will have to be added to the British fauna, 
with a host of other species, if the Atlantic is to be 
“annexed” to the British seas. 
Leda tenuis Phil.—r1o—86 f. This species ranges from being 
oval and depressed to tumid and triangular. Neither 
Jeffreys’ nor Sowerby’s figures correctly represent it. The 
former more nearly approaches Z. /enticuda Moll., in which 
the posterior point is upturned. Sowerby’s figure is the 
best, but double the size it should be. 
L. minuta Mill.—15—oof. There is a form cura, intermediate 
between the type and variety. The finest specimens come 
from the Doggerbank, 35 f., and measure 7 lines by 34. 
1. Poche note intorno alla Conchiologia Mediterranea, Palermo, 1875. 
