

Bivalve Shells of Nova Scotia. 121 



Survey. The matter was left in this form in my edition 

 of 1868. It seems, however, that in substituting a figure 

 not perhaps very accurately drawn from a flattened speci- 

 men, for the figure which Salter had given from an angular 

 and compressed example, I caused some misunderstanding 

 as to one of the species, leading to the supposition that 

 one of those named by Salter was different from that which 

 I recognized by the same name. The difference was really 

 in state of preservation with some inaccuracy in drawing 

 in both cases. I shall give below copies of these imperfect 

 figures, which however, represent actual appearances which 

 may mislead collectors, along with a figure carefully copied 

 from a young specimen less distorted than usual. 



Subsequently to 1868, the pressure of other work pr3- 

 vented me from giving any further attention to these shells, 

 except in collecting such specimens as occurred to me in 

 my visits to the coal-fields of Nova Scotia, and placing these 

 in drawers and collecting-boxes along with the older 

 material. In the autumn of 1892, however. Dr. Wheelton 

 Hind, F.Gr.S., who had undertaken a thorough revision of 

 the specimens of this kind in English collections, was so 

 kind as to invite me to place in his hands for study and 

 comparison specimens of the species I had described. Un- 

 fortunately his letter arrived at a time when I was in- 

 capacitated by severe illness from attending to the matter 

 and was unable to avail myself of his kindness until after 

 the publication of his paper on the British species in 1893. 

 As soon as possible, however, a suite of specimens was sent 

 to him, along with a note on their mode of occurrence and 

 distribution, and the result was a joint paper which appears 

 in the Journal of the Geological Society for August, 1894, 

 on which the following statements are based. 



On examination and comparison with British specimens, 

 some of which are much better preserved than ours, Hind 

 concludes that my seven species, excluding one which he 

 believes belongs to the genus Carbonicola of McCoy, Anthra- 

 cosia of King, are referable to two genera which may be 

 named Naiadites (Anthracoptera of Salter) and Anthracomya 

 of Salter. The first may be regarded as a member of t^ e 



