﻿180 



SUPPLEMENT TO THE CRAG MOLLUSCA. 



Pletjrotoma pygmjEa, Phil. 



This is given with a note of interrogation by Mr. A. Bell in his paper on the " English 

 Crags," p. 28. I have not been able to see the specimen. 



Pleurotoma Icenorum, 8. Wood. Supplement to Crag Moll., p. 35. 



This is said by Mr. A. Bell in his list of the " English Crags "to be identical with 

 PL Hosiusii, Konen, but on comparing my specimen with the German Oligocene shell 

 there appears to be considerable difference. The Crag shell has much coarser strise, and 

 a very obtuse apex, while the second volution is smooth. The knobs on the Crag shell 

 are much larger, and there is a second row of nodules near the suture, a peculiarity which 

 I do not observe on the German shell. Icenorum also has a broader sinus and a shorter 

 canal at the base than has the German shell. 



Pleurotoma oblonga, Men, is given in Mr. Bell's list of Red Crag shells, but with a 

 query. Mr. Canham has sent to me a specimen from the Red Crag at Waldringfield, 

 and I have also had one from Mr. Bell, both of which resemble in shape the species with 

 this name, but they are in an imperfect condition, with the ornamentation obliterated, so 

 that it would be hazardous to refer them under these circumstances, and as the specimens 

 are, I have no doubt, only derivative in the Red Crag, I have not thought it worth while 

 to have them figured. 



Aporrhais pespelicani, Linne, var. Serresiamis. Supplement to Crag Moll., p. 49, and 



Addendum Plate, fig. 6. 



Chenopus serresianus? (Mich.) Phil. En. Moll. Sic, vol. ii, p. 185, t. 26, fig. 6. 



Locality. Cor. Crag, near Orford. 



The above represents one of the specimens previously spoken of at p. 49 of this 

 ' Supplement.' This appears to me to correspond with the figure and description of 

 the Mediterranean shell as given by Philippi. Our Cor. Crag specimens are very 

 variable, some having the ornamental nodules, as in this case, small and numerous, while 

 others have little more than half the number, and there are forms intermediate between 

 the two. Though my specimen has not the digitiform processes perfect, I can see no 



