APPENDIX. 279 



ty of one of our common shells, P. semireticulatus, or even a 

 form of P. Costatus. In any case it is of a Carboniferous type. 



The specimens from the island in Bell Sound are much more 

 numerous ; and in a gray limestone we have, 



1. Athyris or Spirifer, a large smooth species, nearly 3 

 inches across, without any definite hinge-line, and with very 

 strong ventral muscular impressions. The shell is much de- 

 pressed. 



2. Productus costatus, Sowerby, very large, and deeply bi- 

 lobed. Abundant. 



3. Productus, the large striate species above mentioned. 



4. P. Humboldtii, D'Orbigny, two or three specimens. 



5. P. mammatus, Keyserling (?), or an allied species, with- 

 out large scattering spines. This species occurs in Arctic 

 America, having been brought by Captain Belcher from the 

 point opposite Exmouth Island. It is the P. Leplayii of De 

 Koninck's paper on the Fossils from Spitzbergen, but not, I 

 think, of De Verneuil, who described that species in " Russia 

 in Europe." 



Von Buch quotes the Productus giganteus from the South 

 Cape and from Bell Sound : this is not noticed at all in Prof. 

 Koninck's list (1849, op. cit., p. 633). 



6. Camarophoria, a large species, not unlike in shape to the 

 RhynchoneUa acuminata of the Carboniferous limestone, but 

 ribbed throughout. 



7. Spirifer Keilhavii, Von Buch. Several specimens. This, 

 more than any other shell, tends to connect the Spitzbergen 

 formation with surrounding districts. Sp. Keilhavii was de- 

 scribed in the Berlin Trans, for May, 1846. The specimens 

 were brought home by Keilhau from the rocks of Bear Island, 

 in 74° 30' N". lat., half way between Norway and Spitzbergen. 

 In the same paper Von Buch notices that the locality of Bell 

 Sound had been visited by French naturalists (M. Robert and 

 the Scientific Commission which explored these seas in 1839), 

 and that the same Producti and Spirifer (S. Keilhavii) were 



