BIVALVIA. 147 
Donax pouitus; Poli. Crag Moll., vol. ii, p. 220, Tab. XXII, fig. 9. 
Localities. Cor. Crag, Sutton and Gedgrave. Red Crag, Walton (2. Bell), and 
Sutton. 
Mr. Bell gives this shell ( Ann and Mag. Nat. Hist.,’ 1871) from the Red Crag of 
Walton and Sutton, and I have myself a specimen from the latter locality. At the time 
of the publication of the ‘ Crag Mollusca” I-had only seen it from the Cor. Crag. 
PsamMmosia-costuLata; Zurton. Supplement Tab. X, fig. 7. 
Psammosia costuLata, Turt. Conch. Dith., p. 87, tab. vi, fig. 8. 
Locality. Coralline Crag, Sutton. 
In ‘Brit. Conch.,’ vol. ii, p. 395, the author says, “I observed a specimen (of this 
species) in Mr. Searles Wood’s collection in the Brit. Museum.” TI have here had the 
specimen in question figured, and the radiating lines, similar to those which distinguish 
the recent costulata, are very apparent; but the form of the fossil does not accurately 
agree with that of the recent shell, and I am not satisfied that it is the same species. 
Should further specimens turn up which present the same difference in form from the 
recent shell, I should propose for the Crag shell the name pseado-costulata. 
PSAMMOBIA TELLINELLA. Crag Moll., vol. , p. 223, Tab. XXII, fig. 4. 
Locality. Cor. Crag, Sutton. 
Perfect specimens of this shell are very rare with me, but I have met with fragments 
indicating a length of more than an inch, which seems somewhat to exceed that of the 
British shell of this name, and it is rather more elongated and less tumid. It appears to 
me more to resemble the Touraine shell called Psam. afinis, Dujardin (‘ Mém. Géol. Soc. 
Fr., tom. u, pt. i, p. 257, Pl. XXVIII, fig. 4), but I have not been able to obtain a 
specimen of that fossil for comparison, and I have left it for the present with its original 
name. I have seen the Crag shell only from the Cor. Crag of Sutton. 
SoLEcurTUS stRicILLaTUs, Zinné. Crag Moll., vol. ii, p. 252, Tab. XXV, fig. 3 (as 
Macha strigillata). 
Localities. Cor. Crag, Sutton. 
This Mediterranean shell is regarded as distinct from the British one called candidus, 
but I can discover no difference between them except in size and colour, and as stated in 
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