128 



ORTHRAGORISCUS. 



NOTE VIL 

 REMARKS ON THE GENUS ORTHRAGORISCUS. 



BY 



Dr. C. L. REÜVENS. 



(Plate V). 



Some time ago our Museum received a very young spe- 

 cimen (in liquor) of Orthragoriscus-spec. ? This acquisition 

 to the series of 0. -specimens in the Leydeu Museum gives 

 me an opportunity to publish the observations I made in 

 comparing this young animal with the other specimens in 

 our collection. 



The dravt^ing (3 X natural size) , joined to this publi- 

 cation , is made under my direction by Mr. Raar and is a 

 most exact one. 



The large conical spines , scattered over the body of the 

 above mentioned young specimen, have the diameter (at the 

 base) greater than the height, and the top sharp, the small 

 ones, more numerous, have the same form but more ob- 

 tuse. Günther (Catalogue Vol. VHI p. 318) says: »very 

 » young examples with scattered spines, some of which are 

 » permanent through life as osseous tubercles — for instance 

 »at the throat." After an examination of the mounted 

 Orthragoriscus-ST^ecimens in our Museum , I made the follo- 

 wing observations: 



Notes frora ttie Leyden M.useum , Vol. X.VI. 



