86 NEW YORK STATE MUSEUM 



tioned. On the other hand, the general outline, coarse pit- 

 ting, and the central smooth spot are indications of its 

 undoubted close relationship to Macronotella. A very similar 

 form has been described by Dr Gtirich 1 as Primitia orna- 

 tissima, from the lowest middle Devonic of Dabrowa. This 

 later species possesses also a regularly pitted surface, a sub- 

 central smooth spot and a smooth furrow, extending from 

 the central spot dorsally; it is not so regularly oval, has its 

 longest diameter nearer to the cardinal line and is more lenticu- 

 lar in profile than M . fragaria. Dr Gtirich compares 

 his species with Primitia ornata Jones, from the 

 Wenlock beds 2 a form which also bears comparison with ours, 

 but differs in having angular cardinal angles and a coarsely 

 reticulated surface. 



As the smooth median ridge of Macronotella fragaria 

 rests also on a smooth, very faint impression, the relationship 

 also of this species to Primitia is quite apparent. It seems 

 that M. fragaria occupies an intermediate position between 

 those genera, differing in some features from the typical expres- 

 sion of both of them. 



bythocypris Brady 



Bythocypris cylindrica Hall sp. 



Leperditia (Isochilina) cylindrica Hall. N. Y. 

 state cab. nat. hist. 24th an. rep't. 1872. p. 231 



PI. 7, fig. 26-28 



Bythocypris cylindrica is a form of extremely 



frequent occurrence in the reddish gray compact limestone, of 



common occurrence in the gray, more crystalline limestone, and 



rarely found in the black compact limestone pebbles. It was 



described by Hall as occurring in the Hudson river group at 



Cincinnati, and is reported by Ulrich from the Trenton and Utica 



beds of the Cincinnati region and from the Lower Trenton 



(Clitambonites bed) of Cannon Falls Minn. The New York form 



i Das Palaeozoicum im polnisclien Mittelgebirge. Verh. der kaiserl. Russisch. mineral. Gesellsch. 

 zu St Petersburg. 1896. 2d ser. 32:383. 



a An. and mag. nat. hist, 5th ser. 1886. 17:411. 



