188 SUPPLEMENT TO THE CRAG MOLLUSCA. 
Succinea putris, Limnea palustris, and what is probably Limuea Holbollit from the same 
locality. ‘This latter (of which I have myself found several specimens) seems to differ 
specifically from palustris in having a much deeper suture and more convex volutions. 
B. lubricus is common in the Post-glacial Freshwater deposits of this country ; but I had 
not before known it from any deposits so old as the Red Crag. The other species have 
been previously figured as from the Fluvio-marine Crag, and are only mentioned here as 
occurrmg in the Red Crag. I have, at p. 4 of this Supplement, given what appears to 
me to be the true explanation of the occurrence of land and freshwater shells at this 
locality of the Red Crag. 
Cuaustiia piiocena, S. Wood. Addendum Plate, fig. 22. 
I have very recently obtained another land shell from the Cor. Crag of Sutton. This 
undoubtedly belongs to the above-named genus ; but its specific identity is rendered un- 
certain by the fragmentary condition of the specimen. 
Some of the animals of this genus in the living state are of arboreal habits, and my 
present specimen was probably, like Helix Suttonensis, carried into the Crag sea upon 
some dissevered piece of timber, and there deposited among the marine shells, or it may 
have been carried to sea on the feet or in the feathers of a bird. 
Helix Suttonensis, from the same locality, approaches nearer to a living Madeira species 
than to any other that I have seen. J had hoped therefore to have been able to identify 
the present fragment with some species of Clausilia from that island, but I have not 
-been successful in so doing ; and am compelled therefore to give it. provisionally a new 
name, for it does not agree with any British species known to me. 
AVICULA PHAL@NOIDES, S. Wood. Supplement, p. 109, Tab. VIII, fig. 12 a, 6, and 
Addendum Plate, fig. 23. 
I have figured the hinge and umbonal portion of some shells of this genus from the 
Cor. Crag near Orford. None of the specimens of 4. ¢arentina with which I have been 
able to compare the Crag fragments at all approach in the magnitude and thickness of 
their hinges these Crag Avicule, which are about intermediate in this respect between the 
living British and Mediterranean shell Zwrentina, and the gigantic form from the Bord- 
eaux beds called Phalenacea, Bast. ‘There is such a close resemblance between the 
largest of these Cor. Crag hinges and those of the Bordeaux fossil that I have 
assigned to the Crag shell the specific name of Phalenoides. ‘The fragments te which [ 
referred in the ‘Crag Mollusca,’ vol. ii, p. 51, as probably belonging to 2. tarentina, 
belong, no doubt, to the same species as the fragments here figured. 
