On a Deposit in Largo Bay. 23 
of Montacuta or Sphenalia which appears to be the same as 
M. truncata, Wood, a somewhat scarce form in the Suffolk 
Crag, and the Pliocene clay at St Erth, in Cornwall, in which 
T have seen one or two examples, and ranging back in time 
to the Miocenes of the Vienna basin. Like I. donacina, also 
a Crag shell, of which a few recent valves have been dredged 
off the Shetland Islands, itis probably a scarce inhabitant 
in the North Sea, but as yet undiscovered in a recent state. 
From this same locality I have also a single example of 
an Odostomia-like shell that does not appear to be British, 
neither can I trace it as a recent species; it comes near toa 
St Erth shell which I have described as Lulimene acuminata. 
This specimen is broad at the periphery, pointedly acute to 
the apex, and the base of the shell prolonged into a sharp 
spatulous beak. 
Chemnitzia clathrata, of which three or four were picked 
out, does not occur living nearer than the west of Ireland, 
but is a Suffolk Crag, and St Erth fossil. 
The varieties terebellum and suturalis of Od. interstincta 
are more southern than northern shells. The latter is an 
English Pliocene fossil, and occurs recent in the Firth of 
Clyde and elsewhere in the west. The var. terebellwm is 
almost entirely confined in its range to the south-west of 
England and to the Mediterranean. 
Chiton asellus, Chemn. Chemnitzia interstincta, var. sutur- 
»,  fascicularis, L. atis, Phil. 
Trochus wmbilicatus, Mont. a clathrata, Jeffr. 
Lacuna patula, F. & H. Odostomia unidentata, Mont. 
Rissoa costata, Don. 52 pallida, Mont. 
»  tnconspicua, Ald. P Warreni, Thomp. 
3 Le var. albula, E. F.  Plewrotoma costata, var. Metcalfer. 
»,  semistriata, Mont. Pe striolata, Phil. 
»,  soluta, Phil. 4 septangularis, Mont. 
5, proxima, Ald. sg Trevelyana, Turt. 
Hydrobia ventrosa, Mont. Mytilus phaseolinus, Phil. 
Eulimene acuminata, A. Bell. Crenella decussata, Mont. 
Aclis ascaris, Turt. Montacuta truncata, 8S. V. Wood. 
», supranitida, S. V. Wood. Cyamium minutum, Fabr. 
Eulimelia scillae, Scac. Cardium nodosum, Turt. 
Chemnitzia interstincta, Mont. ag suecicum, Loy. 
=A », var. terebellum, Circe minima, Mont. 
Phil. And a Crab, Cancer pagurus. 
