388 



M 



The part S S' has been removed by a fracture. At h too there 

 is a defect, but the faces appear to be crystalline faces. 



Inclinat 



M 



Ton V, 



Tono, 



T on i, 

 V 



on a 



a on z, 

 M on a 

 b on d, 



TonJ, 



90° 



157 







128 30 



113 30 



150 00 



163 00 



1 37 00 



157 00 



149 00 





"\ 





8. New species of Argulus. — At the session of the Yale Natu- 

 ral History Society, on the evening of June 2d, 1836, a communi- 

 cation was presented by Messrs. J. D. Dana and E. C. Hebrick, 

 comprising a detailed description of a new parasitic crustaceous am- 



