Mineralogy and Geology. 279 
has been described under the name 7’. occidens, 
The relations of the genus Vitulina are not fully established. 
shell-structure is punctate, with a papillose surface, a high area on the 
ventral valve, with a large triangular fissure. The genus embraces a 
single species, the Vitulina pustulosa. : 
toa f 
With its accuracy and beauty, that the world may speedily reap the full 
benefit of his extended researches 
Ponding English boas of Cheny Longville are in Shropshire ; and here, 
48 In every part of the northern hemisphere, the Spirigera reticulata is 
the commonest Brachiopod, and many others identical with species 
England, Bohemia, and North America occur with it. 
_ The Ludlow rocks are indicated by the Orthoceras bullatum, and a 
Series of starfish closely representing those of the English Ludlow beds, 
ether with a beautiful new Homalonotus (H. Harrisont robe 
Which I have named a ; s Lu 
densis, Hemithyris diodonta Dal. is as abundant in the Mayhil 
