THE NATURALIST, 1909. 



Plate XIII. 



Copy of Reinecke's original figure of Am. serpeiitiuns, [Hildoceras 

 serpentinum) ; from negative lent by Mr. S. S. Buckman. (Very slightly 

 reduced; trans, diani, should be 71 ni.m.) 



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Hildoceras sevpentinimi, (Rein. sp.). From photograph of specimen 

 in the collection of Mr. S. S. Buckman. Photographed by Miss Buckman. 

 (A little over 5 nat. size). 



