(Tiurn encrini). Mr. Walch is induced, from this extension of its 

 branches along the lime-stone, to consider it as a particular species, 

 and from this property, to term it Entrochus Ramosus repens. 



One similarity between the fossils of Pfeffingen and those of Wilt- 

 shire, and which may be implied from the colouring of the plates 

 which represent the former in Knorr's work, deserves to be particu- 

 larly noticed. The artist, who has executed his part with great fidelity, 

 has thrown a purple tinge into the specimens from Pfeffingen, which, 

 I well remember, when I first saw, appeared to me to be gaudy and un- 

 natural ; but, as has been already observed, this same purplish tinge 

 characterizes the specimens found at Bradford, and gives to the spa- 

 those matter very much the appearance of purple fluor. 



The resemblance between the fossils of Pfeffingen and those of 

 Bradford extends still farther. The entrochi of both places agree 

 in a peculiar characteristic neatness in their form, and particularly in 

 the neatness of the line of articulation, resulting from the fineness of 

 the radiating striae, which mark the surfaces of their trochitae. So ex- 

 act is this agreement, that there is not a doubt, that any one who was 

 acquainted with the forms of different entrochi, but who had not 

 seen those of Pfeffingen, would, immediately on seeing the figures of 

 these, in the work of Knorr, have named them for the entrochi of 

 Bradford. 



