36 NKW YORK STATE MISKIM 



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

 ting, and the central smooth si>ot are indictaions of its 

 undoubted close relationship to Macronotella. A very similar 

 form has been described by l>r Giirich ^ as 1* r i m i t i a o r n a - 

 t i 8 6 i m a , from the lowest middle Devouic of Dabrowa. This 

 later species i>ossesses also a i c^nilarly pitted surface, a sub- 

 central smooth spot and a smooth furrow, extending from 

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

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

 lar in profile tlian M . f r a g a r i a . Dr Giirich compares 

 his speciofi with P r i m i t i a o r n a t a Jones, from the 

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

 but diffei's in having angular cardinal angles and a coarsely 

 reticulated surface. 



As the smooth median ridge of :M a c r o n o t e 1 1 a f r a g a r i a 

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

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

 that M . f r a g a r i a occupies an intermediate position between 

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

 sion of both of them. 



BYTHocYPRis lirady 



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 f(Min of extremely 

 frequent occuiTonce in the reddish gray compact limestone, of 

 common occurmice in the giay. more crystalline lim<^stone, and 

 rarely found in the black compact limestone i>ebbles. It wa« 

 described by Hall as occurring in the Hudson river group at 

 Cincinnati, and is reported by T']ri<li fiom the Trenton and Utica 

 beds of the Cincinnati region and from the Lower Trenton 

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



.Da8Palaeozolcumlmpolnl«chenMlttelgeblrge. Verb, der kalserl. Russlsch. mineral. Gesellsch. 

 lu 8t Petergburg. 1896. 2d »cr. 32 : S83. 



« An. and ma«. nat. hlflt. 5th »er. 18S6. 17:411. 



