collected by Capt. Bayfield in Canada. 141 



probably incline to believe, that two shells of the above list which I have figured, 

 Scalaria groenlandica and Tellina calcarea, ought to be regarded as new and distinct 

 species. In every case it seems clear that when the Beauport fossils were de- 

 posited the testaceous fauna approached more nearly to that now established in 

 the arctic regions, than to that which characterizes at present the Gulf of St. Law- 

 rence ; and the small number of species, amid so great a profusion of individuals, 

 affords, as before hinted, a strong argument in favour of the greater severity of the 

 climate at an epoch immediately antecedent to the present. Nor should we be 

 surprised at discovering that there have been oscillations of climate in times which 

 are, comparatively speaking, of recent date, when we see proofs of considerable 

 geographical changes within the same epoch, namely, those w^hich in Canada have 

 converted sea into land, and raised the shelly strata above described to the height 

 of 300 feet. 



I think it probable that this extreme climate prevailed at once in the north of 

 Europe and in Canada at the time when the shelly strata of Scandinavia and the 

 basin of the St. Lawrence were simultaneously accumulated, and that there was 

 then a more close resemblance between the shells living in these latitudes, on either 

 side of the Atlantic, than we find at the present epoch. 



Description of Plate XVIL 



Fig. 1, 2. Tritonium anglicanum. (Buccinum undatum ?) Fig. 2 has the ridges less prominent. 



Fig. 3. T.fornicatum, Fab. (Fusus carinatus, Lamk.) 



Fig. 4. Scalaria Groenlandica, var. ? 



Fig. 5, 6. Mya truncata. 



Fig. 7. Saxicava rugosa, variety having the umbones more central. 



Fig. 8. Tellina Groenlandica, Beck. Fig. 8. a. shows the outer, and 8. b. the inner side. 



Fig. 9, 10, 11. Tellina calcarea, var.? Wahlenberg. {T.proxima, Brown, T. triangularis, Phil. Trans. 



1835, p. 36.) 

 Fig. 12. Balanus miser, Gould. 12a. shows the ordinary form; 12. b. represents a single valve of an 



elongated variety. 



The above eight species found fossil at Beauport, Canada. 



