479 



Obol. 



Oholella phillipsia. See Kutorgina cingulata. Z. C, 

 Obolella pretiosa, Billings. Pal. Foss. Vol. 1, 1862. Geol. 

 Can. 1863, page 230, fig. 239, a^ h (for which see under Obolella 

 chromatica^ aboYe) , Quebec group^ (luogan). — Z. C, 



Obolella saoittaUs Davidson. Now Linnarssonia sagit- 



'538/ 



Obolella transversa^ Hartt. 



c. — ' 



y\vxt t^lis. Walcottf 

 Am. Jour. Sc. 1885, 

 p. 116, from Dav- 

 idson, fig. 5, cast 

 of interior of ven- 

 tral, and fig. 8, of 

 dorsal valve. 



Now Linnarssonia trans- 



6 



Walcott 



. ISB 



p.n& 



versa. Walcott. Am. J. S. Vol. 29, Feb. 1885, p. 116, fig. 3, 

 outline of interior of ventral valve, apex of triangular projec- 

 tion in front of the hole (foramen) broken ofi*; fig. 4, cast of 

 interior of ventral valve ; fig. 6, interior ot flattened dorsal 

 valve : fig. 7, cast of an uncompressed dorsal valve. From the 



