548 



Researches in Fossil Zoology. 



be remembered that the state of the fossil (though very good 

 for a Unio) is such as to render it impossible to institute a 

 comparison in all points. 



Valves of fossil Unio from Grays. 



Art. V. — Recent Researches in Fossil Zoology. By Hermann 

 Von Meyer.* 



Under the name of Palinurus Sueri, Desmarest mentions a 

 crab, which I find to constitute a peculiar genus : this I have 

 called Pemphia, and upon it I intend to publish a detailed 

 description. This genus, two species of which are already 

 known to me, viz., Pern. Sueri and Pern. Alberti, has hither- 

 to belonged to the muschelkalk. My Pern. Alberti has only 

 been found in the dolomitic marl of the muschelkalk, near 

 Horgen, in the Black Forest, and is very rare ; whilst Pern. 

 Sueri, of which I have examined more than a hundred spe- 

 cimens, chiefly found in Suabia, is principally abundant in 

 the upper division of the muschelkalk formation, or chalk of 

 Fredericshall. In other parts they are more scarce, and in 

 some they have not been found at all in the muschelkalk of 

 this age. I know also of this species in the dolomitic marl 



* The English is that of Dr. I. Lenau, who, in conjunction with Count 

 Munster and Hermann Von Meyer, is about to publish an extensive work 

 on fossils, to which the present article has reference. Not having the ori- 

 ginal German manuscript to consult, we have been unable to correct some 

 passages, the exact meaning of which is not clearly apparent. — Ed. 



