29 



In this species the upper lip presents a furrow pa- 

 rallel to its edges. The lip is straight. The cheeks are 

 a little projecting. There are six rounded tubercles 

 on the front, and fourteen articulations on the back; 

 the tail is small, and the shell is covered with small 

 rounded tubercles of unequal sizes. 



The above is Professor Brongniart's description of 

 this trilobite, which is the famous Dudley fossil de- 

 scribed and figured by Littleton, in the Philosophical 

 Transactions, (London) in 1750. According to Dai- 

 man, several distinct European species have been 

 published under this name. The true C. Blumen- 

 bachii, he says, has thirteen articulations to the abdo- 

 men, and about eight to the tail. In -he cabinet of 

 G. W. Featherstonhaugh, Esq., we have examined a 

 fine perfect specimen from Dudley,* in which there 

 is fourteen abdominal joints. There can be no doubt, 

 however, that several species have been confounded 

 under the name of C. Blumenbachii; Dalman's C, 

 Tuberculata and C. Pulchella are, we think, distinct 

 from it, though he has marked them only as varieties. 



The true C. Blumenbachii, no doubt, abounds in 

 North America, and is one of the few examples of the 

 occurrence of an identical species on both continents. 

 The late Abbe Correa sent a perfect specimen to 

 Brongniart, from the vicinity of Lebanon, in the state 



> This famous trilobite, once formed a part of the cabinet of 

 Mr. Parkinson, the distinguished author of the " Organic Re- 

 mains," and is accurately figured on one of the plates of that 

 splendid work. At the sale of the late Mr. Parkinson's fossils, 

 it was purchased by Mr. Featherstonhaugh, 



