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SIR V. BROOKE ON CERVUS MESOPOTAMICUS. [Mar. 7, 



elusive of those figured) agree together, while they differ from the 

 specimen first received ; a slight modification of my original diagnosis 

 appears to me to be therefore necessary. 



With one exception (fig. 2), in none of the horns lately sent by 

 Mr. Robertson is the inner tine b (I. c. p. 264, fig. 3 b) developed, 

 from which I am led to believe that this tine is of uncertain occur- 



Fig. 2. 



Left horn of Cervns mesopotaviicus (about four years of age). 



rence, and does not by any means constitute a fundamental specific 

 character. Again, with but one exception (fig. 3 c), in none of the new 

 specimens is the upper of the two tines (I. c. p. 264, fig. 3, c) which 

 projects from the anterior aspect of the palmated portion of the horn 

 any thing more than a mere rudiment ; in some it is entirely absent. 

 Instead of being subcylindrical, as was the case with the beam of 

 the old type specimen, the beams of all the new specimens are very 

 decidedly compressed anteriorly, forming, in the more adult, a sharp 

 ridge from which are, not unfrequently, developed blunt rudimentary 

 tines (c, figs. 1, 2, 3, 4). In the finest horn sent by Mr. Robertson 

 the upper third of the beam is furnished with eight strong tines, 

 some of which are upwards of 7" in length (fig. 1 cl) ; and even in the 

 horns belonging to younger animals (figs. 2 & 3) these coronal tines 



