333 Prof. Bailey on Fossil and Recent Infusoria. 



surfaces a series of marks somewhat like those in Terpsinoe, 

 which Ehrenberg has compared to notes of music. The end 

 view shows considerable variety in the outline, but always pre- 

 sents a series of transverse bars or ribs, which in the most round- 

 ed specimens resemble the parallels of latitude drawn upon the 

 map of a hemisphere. Fossil at Oregon ; common. 



2. ISurirella , n. sp. ? (Fig. 6.) — This elegant species of 



Surirella is distinguished by its eUiptical outline and the very 

 large ribs or folds of its undulated margin. Fossil at Oregon ; 

 rare. 



3. Galliojiella , n. sp. 7 («). (Fig. 7.) — This species of 



Gallionella is remarkable for the size of its frustules, which greatly 

 exceeds that of any known species of the genus, being often three 

 times larger in diameter than G. moniliformis. The outer shell 

 appears to be very minutely and irregularly punctate. The out- 

 line of the inner cavity, as seen through the shell, resembles that 

 of a bell-crown hat. The length of a frustule is about equal to 

 its diameter. Fossil at Oregon ; common. 



4. Gallionella , n.sp.? ((?). (Fig. 8.) — This species is 



much smaller than the preceding, and has the surface of the frus- 

 tules covered with granules, so arranged as to give longitudinal 

 and transverse hues. The length of a frustule is about equal to 

 its radius. Fossil at Oregon ; common. 



5. Gallionella , n. sp. (r). (Fig. 9.) — This species may 



possibly be a young state of the last, (|9) ; but it appears distinct 

 m its smaller size, and by the length of the individuals being 

 often equal to their diameter. The granules present longitudinal 

 and transverse rows, as in the preceding species. Fossil at Ore- 

 gon ; common. 



Besides the above forms, there were also detected spiculae of 

 Spongillse, a few minute species of Navicula, Cocconeis, &c. 



Although I have little doubt that the above forms are new, I 

 waive the right of naming them myself, in order that they may 

 be examined by Ehrenberg, compared by him to the forms of 

 other regions, and finally introduced into science by his undoubt- 

 ed authority. 



With regard to the geological position of the above fossils, I 

 can only state that the specimen in which I detected them was 

 labelled by Mr. Dana as coming from the " Tertiary of Oregon," 

 and that a considerable mass of the same earth is placed with 



