From Beechey Island and Port Dundas. 389 



Museum. Fig. 6 is a larger but much weathered specimen from 

 Port Dundas, N. Devon, lat. 75°, 200 miles to the East of Cape 

 Eiley. This specimen was presented to the British Museum by 

 Thomas Crowther Brown, Esq., of Cirencester. 



In many of these corals, which have been partially silicified, the 

 limestone has frequently been dissolved out, leaving cavities in the 

 fossils. 



5. Alveolites ? arctica, sp. n., H. Woodw. PI. X. Fig. 7. 



This small ramose coral occurs in considerable abundance in the 

 shaly limestone of Beechey Island; but few specimens have the 

 calices preserved, and they are more widely separated than in 

 Alveolites ? seriatoporo'ides, Edw. & H. 



The specimen, a part of which has been drawn on our Plate 

 (Fig. 7), is covered on both surfaces with the small branching stems 

 of this Alveolite, and the transverse section shows the interior of the 

 rock to be similarly crowded. 



Stems, mostly cylindrical, about 1 mm. in diameter, pores about 2 

 in every mm. Some of the branches have annular constrictions, 

 giving them in places a slightly moniliform appearance ; terminations 

 of branches rounded. The tendency to ramify is not greatly deve- 

 loped in this form, although many of the stems have well-marked 

 branches exposed. 



These specimens (like nearly all the Arctic fossils I have seen) 

 have long been exposed to atmospheric influence in the cliffs, and 

 consequently present a smoothed appearance. 



Locality. — Beechey Island, brought home by Dr. A. Horner of the 

 S.Y. "Pandora." 



6. Atrypa phoca, Salter, sp. PI. X. Fig. 8 (young state). 



RhyncJionella phoca, Salter. Appendix to Sutherland's Journal, 1850-51. 

 London, 1852, Geology by J. W. Salter, p. ccxxvi. pi. v. figs. 1, 2, 3. Variety of 

 T. subcamelina, De Yarn., Geol. Russ., vol. ii. pi. 9, fig. 4. 



Atrypa phoca, Salter, sp. Haughton, Description of Fossils accompanying Capt. 

 Sir Leopold M'Clintock's Reminiscences of Arctic Ice-Travel in Search of Sir John 

 Franklin, Proc. Eoy. Dublin Soc, 1856, vol. i. p. 240, pi. v. figs. 3, 4, 7. 



Prof. Haughton, writing on this species {op. cit.), says : — " This is 

 the BhjncJionella phoca of Salter. I have ventured to place it under 

 the genus Atrypa, as I cannot find any trace of an aperture in or 

 under the beak." I insert Mr. Salter's description, altering only the 

 genus : — 



" Description. — Eounded, globose, valves longer than broad, their 

 greatest breadth at about the middle of the shell, thence becoming 

 rapidly narrower towards the front, which is somewhat truncated. 

 Valves equally convex in middle age ; in old specimens the smaller 

 one rather gibbous near the beak, but not raised into a ridge. Beak 

 small but prominent, incurved in full-grown specimens. Front not 

 at all raised, but indented by a broad, shallow sinus. The large 

 valve has a distinct narrow median sulcus in the depression. Surface 

 concentrically striated, often interrupted by lines of growth. 



" Except for the imperforate beak, this might be taken for an Oolitic 



