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SUPPLEMENT TO THE CRAG MOLLUSCA. 



what was meant by Forbes in his ' iEgean Report ' and by myself in the ' Crag Mollusca ' 

 (p. 48), there seems no reason why the name of Forbes, first published for the elongated 

 form, should not be adopted as a specific one for it. 



Lima ovata, S. Wood. Crag Moll., vol. ii, p. 48, Tab. VII, fig. 5. 



This shell somewhat resembles L. crassa, of Forbes, of which two specimens from the 

 Mediterranean were given by Forbes to me, but it is much more elongated and 

 has less imbricated costa? than crassa. It appears to me also different from L. Sarsii. 

 Ostrea nivea, Ren. (figured by Broc, tab. 14, fig. 14), was given by me as a synonym for 

 L. subauriculata. Mr. Jeffreys, in his Cor. Crag list to Mr. Prestwich's paper, identifies 

 it with L. ovata, but 0. nivea is more than double the linear dimensions of ovata, and is, 

 moreover, described by Philippi as " lateribus compressa" which is not the case with ovata. 

 Philippi, moreover, adds to the description of L. nivea "medio longitudinaliter sulcata" 

 which description, as well as the size, assimilates it to subauriculata. The Belgian Crag 

 shell called nivea by Nyst is also described as " lateribus compressis." 



Lima exilis, 8. Wood. Crag Moll., vol. ii, p. 43, Tab. VII, fig. 6. 



Localities. Cor. Crag, Ramsholt, Sudbourn, and Sutton. Red Crag, Walton and 

 Butley. 



This shell is by Mr. Jeffreys in 'Quart. Jour./ vol. xxvii, p. 139, referred to L. 

 inflata, Lam., as also by Mr. Bell in 'Ann. and Mag. Nat. Hist./ May, 1871. The 

 authors of the ' Brit. Moll.' (vol. ii, p. 26S) place the Crag shell exilis as a synonym 

 to L. hians. I have re-examined my specimens, and find a difference between the Cor. 

 Crag shell and the recent inflata, the former having a narrower hinge-line, and being less 

 inflated than the latter. At the same time, however, it must be admitted that the speci- 

 mens of exilis from the Red Crag approach rather nearer to the living inflata. In ' Crag 

 Moll.,' vol. ii, p. 43, it was said of the shell that it somewhat resembled L. inflata, but is 

 flatter and undeserving that name. Specimens of inflata from the Italian Tertiaries are 

 much larger and more tumid. 



Lima hians, Gmelin. Crag Moll., vol. ii, p. 44, Tab. VII, fig. 2. 

 Localities. Cor. Crag, Ramsholt. Middle Glacial, Hopton ? 



