41 



specimen, transformed into red jasper, from Prof. 

 Ducatel, said to be found in the United States no 

 precise locality is given. Our model represents the 

 animal which is supposed to be the one intended by 

 Brongniart as the C. Macrophthalma of North Ame- 

 rica. It is, in our opinion, a variety gf the C. Bufo. 

 There can be no doubt that several species have been 

 confounded under the name of C. Macrophthalma. 



The following extract of a letter from Professor 

 Ducatel to the author, referring to the locality of this 

 species, will be read with interest. 



" I cannot be positive as to my recollection of the 

 locality of the fossil referred to by Brongniart and 

 yourself, but believe it is one of several found by my 

 friend Dr. M'Culloh, in the neighbourhood of Berk- 

 ley Springs, Virginia. I regret that I have not in 

 my possession another specimen to present to you." 



CALYMENE BUFO. Green. Cast No. 10. 



Clypeo rotundato, convexo, punctato; abdominis 

 articulis sexdecimj cauda attenuata; corpore piano. 



Buckler semilunate, front very large, rounded be- 

 fore and arcuated at the insertion of the middle lobe; 

 surface convex, and marked with numerous depressed 

 pimples. Mouth large, lunate, resembling that of a 



scription of the macrophthalma, and with the above fossil from 

 Dudley. We regret that the imperfection of the fossil prevents 

 our giving a satisfactory cast of it. 



D 2 



