492 Dr. Gwyn Jeffreys on the Post-tertiary Fossils 



additions to my former list, and raise the number of fossil 

 species to 27. 



I take this opportunity of also supplementing, but in a less 

 degree, the list of recent Mollusca from the Arctic Expe- 

 dition. 



Beachiopoda. 



Rhynchonella psittacea. 

 Anomia rostrum jisittaci, Chemn. yiii. p. 106, tab. 78. fig. 713, a, b, c. 



Franklin-Pierce Bay, lat. 79° 25' N., 15 fathoms (Feilden 

 and Hart) : Cape Napoleon, 25 fms. (Feilden). 



Inhabits the Arctic seas in both hemispheres, southwards to 

 Newfoundland and Norway (and perhaps Shetland also), in 

 from 12 to 150 fathoms. It has a rather more extensive dis- 

 tribution in a fossil state, and occurs in our newer Crag and 

 Post-tertiary beds, as well as in Canada. See ' British Con- 

 chology,' vol. ii. pp. 22, 23, and vol. v. p. 164, pi. xcix. 

 fig. 4. 



Gasteopoda. 

 Trochus umhilicalis (p. 235) . 



Mushroom Point, 82° 29' N. lat. (Feilden) : Floeberg Beach, 

 82° 27' N. lat. (Moss). Not recorded in a recent or fossil 

 state anywhere south of the Arctic circle. 



Trochus olivaceus (p. 240). 



Cape Frazer, 80 fms. ; lat. 79° 44' N. 

 In the stomach of a Crossaster papposus (Feilden). 

 For synonymy and range see ' Annals,' March 1877, pp. 

 237, 238. 



Cylichna striata, Brown. 

 Bulla striata, Brown, 111. 1827, pi. 38. figs. 41, 42. 



Floeberg Beach (Moss). 



This high-northern species is the Bulla occulta of Mighels 

 and Adams (1841), B. Reinhardi of Moller (1842), B. scalpta 

 of Beeve (1855), and B. propinqua of M. Sars (1858). 

 Recent: Greenland (Moller and others) ; Wellington Channel 

 (Belcher) ; New England (Mighels) ; Spitzbergen (Torell, 

 Eaton); Tromso (Sars). Fossil: Clyde Beds (Stewart, ^We 

 Brown) ; Westbrook, Maine (Gould) . 



It differs in shape and sculpture from Bulla solitaria, Say, 

 = 5. iyisculpta, Totten ; in the present species the crown or 

 apex is abruptly truncated or flattened, and the strise are more 



