64 SUPPLEMENT TO THE CRAG MOLLUSCA. 



Odostomia unidentata, Montagu. Appendix, p. 317, Tab. XXXI, fig. 11. 



Localities. Red Crag, Walton. Middle Glacial, Billockby? 



In addition to the solitary specimen from Walton, mentioned p. 317 of Appendix, a 

 specimen has occurred in the Middle Glacial sand at Billockby that seems referable to 

 this species, but it is not sufficiently perfect to be free from doubt. 



Odostomia obliqua ? Alder. Supplement, Tab. IV, fig. 24. 



Odostomia obliqua, Alder. Ann. and Mag. Nat. Hist., vol. xiii, p. 327, pi. viii, fig. 12. 



Locality. Cor. Crag, Sutton. 



A single specimen, obtained by me from the Cor. Crag of Sutton, is represented in 

 the above figure, and referred with doubt to the above species ; it is, I believe, a young 

 individual, and the form not very well shown. Mr. A. Bell has since my engraving was 

 made found a full-grown specimen, which I would rather have figured. 



Odostomia? ornata, S. Wood. Crag. Moll., vol. i, p. 87, Tab. IX, fig. 6 (as 



0. similima). 



This shell is, I now believe, quite distinct from 0. simillima of Montague, to which I 

 assigned it with doubt in the ; Crag Moll.' I am unable to refer the Crag shell to any 

 species known to myself, either British or European. In my ' Catalogue of Crag Mol- 

 lusca,' 1842, it was called Missoa? costellala, but as the name costellala is already 

 appropriated to another shell, I propose to call it ornata. It is so aberrant a form of 

 Odostomia that I had intended to erect a new genus for it, but I have thought it better 

 to leave that task to some future author, when some allied forms that can be grouped with 

 it may have been discovered. 



Odostomia albella, Loveti. 



Since the figures for this Supplement were engraved Mr. Robert Bell has sent me 

 from the Coralline Crag of Sutton a specimen with the name albella attached, but I have 

 not yet had the opportunity of comparing it with Loven's shell. 



Genus.— EULIMENE. 



In the ' Crag Mollusca,' vol. i, p. 109, two Red Crag shells are referred to the genus Palu- 

 destrina, viz. P. pend/da and P. terrebellata. The first of these was described in my Cata- 

 logue of 1842 as Eulimapendula. In external shape both these shells resemble some of the 



