130 NEW VOHK STATM MUSMUAI 



exopllont t\iM»sure in (lu- t;i^i b;nik of Oiilka cnM^k hclow the 

 bridjjo at Main street. 



At Lancaster, Erie eo. the IxmIs heneatli the typical dark lime- 

 stones at Start'ord have beooiiic lii<:hly calrareons, giving a thick- 

 ness of upward ol s f(M4 of the liiiK^stonc* section, all of these 

 bed*; carryin*; a llaiiiiUou faniia wilh sonic ^in•iations in character 

 for the ditlerent beds. This section has been carefull}' studied 

 by Klvira AA'ood, whose succincl account of the fauna and its 

 variations is jjiven ai ilie chhse of tliis article. Here the bods, 

 evidently continuous with ilu' heavy limestones at ^afford, are 

 tlie upiKM'uiost of the section uMiss Wood's vii and viii), and it is 

 inferentially pix)bable that at Stafford, which is only a few miles 

 eatst of Lancaster, the lower jiart of this series is concealed; at 

 the same time it is quite evident from the other sections cited 

 that the calcifying of the lower beds is a feature of the western 

 extension of this formation, l^etween Lancaster and I^ake Erie, 

 however, but a few incomplete outciops of the horizon have been 

 recorded. 



FAUNA OF THE STAFFORD LIMESTONE 



From the determinations made by the writer some years ago,^ 

 combined with those given by Miss Wood in the appended 

 I)ajH3r, we may ascribe the following to the fauna of the Stalford 

 limestone. 



1 Fauna of the Stafford limestone at Stafford, Livonia shaft, Flint 

 creek, Lancaster (Miss Wood's upper beds vii and viii) and 

 elsewhere 



I'lidetermined plates and scales 



Sjiirorbis 



Crusfaccnns 



Ilomalonotus dekayi (ivvru 

 riia< ((j«< rana Green 

 Cryphaeus boothi Given 

 C. boothi var. cal li teles- rr/Tcwt 



» N. V. state geol. 8th an. rep't p.' 60, 1889. 



