On Foramimferafrom the Gulf and River St. Lawrence. 83 



girdle. The body-scales have likewise been found associated 

 with the bones. 



We have also good reason to conclude that the genus Arch- 

 icldhys occurs not only in other coal-lields, but likewise con- 

 siderably lower in the Carboniferous series. 



EXPLANATION OF PLATE VL 



View of tlie inner surface of a portion of a mandibular ramus oi Antliraco- 

 saunis RiisseUi, a little reduced in size : a, alveolar border ; I), in- 

 ferior margin ; c, inner or splenial plate ; cl, outer plate or dentary 

 bone ; e, depression in alveolar border ; /, elevated straight portion 

 of ditto ; /7, impression of first tooth of the series j h, remains of the 

 last ditto. 



X. — On Foramimfera from the Gulf and River St. Lawrence. 

 By G. M. Dawson*. 



Several of the species of Foraniinifera found in the Gulf of 

 St. Lawrence have been noticed by Principal Dawson in vol. v. 

 of the '■ Canadian Naturalist,' p. 188 et seq. The following 

 Table (pp. 88, 89), however, is the only approach to a complete 

 view of the species and their distribution hitherto attempted. 



]\[any of the deeper samples were small quantities of 

 mud brought up in sounding, by Capt. Orlebar, R.N,, of the 

 Coast Survey, and by him kindly presented to Dr. Dawson. 



The specimens from Labrador were obtained from material 

 dredged by the officers of the Geological Survey ; those from 

 Prince-Edward Island were from a sample secured by C. 

 Robb, Esq. ; and those from the bank of Newfomidland were 

 obtained from the late Sheriff Dickson, of Kingston. 



The somewhat extensive series from Gaspe Bay was ob- 

 tained during a dredging-expedition in the summer of 1869. 

 The mud was sampled when brought up by the dredge, and 

 reserved for examination, the depth being ascertained as care- 

 fully as possible. Several very rich and interesting samples 

 are also from the dredgings of Mr. J. F. Whiteaves, F.G.S., 

 in Gaspe and its vicinity. 



The means were, unfortunately, not at hand for ascertaining 

 the temperature of the bottom. But though there is reason to 

 believe that the water at Gasp^ Bay is somewhat warmer 

 than the Gulf of St. Lawrence in general, the mud as it came 

 over the boat's side felt icy cold to the hand, showing even 

 here what a great effect the iceberg-laden arctic current has 

 on the bottom temperature. The number of species tabulated 

 must not in every instance be taken as a criterion of the rela- 



* From the ' Canadian Naturalist,' June 1870 ; communicated by the 

 Author. 



