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DESCEIPTION OF A NEW SPECIES OF GEEPIDULA 



FEOM THE EOCENE BEDS, TABLE CAPE. 



By Eobt. M. Johnston, F.L.S., Etc. 



[Bead August 11th, 1884.] 



In addition to the three representatives of the family 

 Calyptraeidae already described from the Table Cape beds, 

 viz : — Infundihulum calyptraeformis, Desh. Crepidula turhi- 

 nata, Woods, and C. umbilicata, Johnston, I have now the 

 pleasure to announce the existence of a fourth species of this 

 interesting family from the same formation. The following 

 is a description giving the specific characters of the new 

 form : — 



Crepidula Hainsworthii, no v. sp. 



Shell, thin, ovate, narrowly and abruptly arched laterally, 

 and gently rounded longitudinally, dorsal surface finely 

 striated with lines of growth ; whorls one and a half rapidly 

 and laxly expanding ; nucleus minute, of one turn, exserted 

 on posterior margin, slightly beaked and incurved. Inner 

 shelf concave, transversely striate, deeply sunk and partly 

 dividing the cavity leading to exserted nucleus ; the shelf 

 scarcely occupies one-third of the posterior part of the shell. 

 Aperture narrowly ovate. 



Length, 14mil. ; breadth, 8mil. ; height, 5|^mil. 



The younger examples differ very much in appearance 

 from the mature form, being relatively shallower and scarcely 

 beaked. 



I have much pleasure in associating this shell with the 

 name of Mr. Thomas Hainsworth, of Latrobe, who has largely 

 contributed to our knowledge of the geology of the North- 

 West Coast of Tasmania. 



NOTES ON THE DISCOVEEY OF TWO EAEE 



SPECIES OF FEENS, NEW TO TASMANIA. 



By Eobt. M. Johnston, F.L.S., Etc. 



[Bead August 11, 1884.] 



Thanks to the distirguished labours of Eobt. Brown, J. D. 

 Hooker, Gunn, Stuart, and other naturalists, the extent and 

 distribution of our Tasmanian ferns, in nearly all parts of the 

 island, have been so thoroughly investigated that it would 

 seem little now remains to be done. Still there are certain 

 Alpine regions in the North- Western and in the extreme 

 South of this island which, being densely covered with an 



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