M. Agassiz on Shells from the Crag. 



343 



XXXIX. — Additions to Mr. Wood's Catalogue of Crag Ra- 

 diaria*. By M. Agassiz. 



To the Editors of the Annals and Magazine of Natural History. 



Gentlemen, 



Mons. Agassiz a few hours previous to his departure for the 

 continent paid me a very short visit, and was able to deter- 

 mine among my crag Radiaria the following genera, which I 

 am desirous should be made known (having his permission), 

 as there are some among them that would scarcely be looked 

 for in that deposit. The list comprises all that M. Agassiz 

 had seen from the crag during his sojourn in this country. 



Yours, &c. 

 S. V. Wood. 



December 8, 1840. 



No. 

 of 

 Sp. 



DESCRIPTION. 



Genera. 



Pentacrinus..., 



Comatula , 



Comatula , 



Astei*ias , 



Echinus , 



Echinopsis .... 

 Echinopsis .... 

 Echinopsis .... 

 Temnopleurus 

 Temnopleurus 

 Temnopleurus 



Arbacea 



Salenia 



Fibularia 



Fibularia .... 

 Fibularia 

 Fibularia .... 



Fibularia 



Brissus 



Amphidetus 

 Spatangus 



Coralline Crag. 



Red Crag. 



Sutton. 



Sutton. 



Sutton. 



Iken. 



Sutton. 



Ramsholt. 



Ramsbolt. 

 Ramsholt. 



Ramsholt. 



Sutton. 



Ramsholt. 



Sutton. 



Sutton. 



Near Orford. 



Sutton 



Ramsholt. 



Sutton. 



Sutton. 

 Sutton. 



Alderton. 

 Sutton. 



Sutton. 



* See above, p. 245. 



