186 [ Senate 



from Tellinomya, to which it must be referred*. The shells of the Genus 

 Tellinomya are shown to differ from Nucula, Isoarca, Nuculites, and 

 Cucullella. 



In addition to the species described under this genus in the first volume 

 of the Palaeontology of New-York, may be added T. [Nucula) levata, T. 

 [Nucula) donaciformiSy T. [Lyrodesma) pulchella; and also the following 

 species, described by Professor Phillips ( Memoirs Geological Survey 

 of Great Britain, vol. 2 ) : Tellinomya [Nucula) coarctata, T. [Nucula) 

 deltoidea, T. [Nucula) lingualis, T. [Nucula) rhomboidea. 



* Since the publication of this article in the Canadian Naturalist and Geologist, a 

 note from Mr. Conrad informs me that he never supposed the Gemis Lyrodesma to 

 be related to Nucula. the teeth being quite different from those of that genus. My 

 reference, therefore, of L. pulchella was evidently erroneous, and is here corrected. 



