624 NOTES ON THE PALEONTOLOGY OF LEWIS-GILMER COUNTIES. 



Ames Limestone. The several divisions of this horizon 

 given by Reger in the general section (see table above) are 

 here discussed as a unit. From the table of Range and Dis- 

 tribution of Fossils, it will be seen that this is the most fossil- 

 iferous of all the horizons of the area, both in number of 

 species and number of individuals. Of some 83 species listed, 

 about 47 are found in the Ames, 42 in the Brush Creek, 6 in 

 the Pine Creek, and 23 in the Kanawha Black Flint. The 

 Ames contains 12 brachiopod species, 20 pelecypoda and 6 

 gastropoda. Half the number of brachiopoda found in the 

 Ames are restricted to it in the collections examined. Produc- 

 tus com is the only one of these which is common. Productus 

 pcrtenuis, Pu-stula nebraskensis, P. symmetrica, Ambocoetia 

 planiconvexa, and Lingula umbonata are rare in the collec- 

 tions, and found only in the Ames. Ambocoelia planiconvexa 

 is the only one of the above that is known to be restricted to 

 the Ames elsewhere in the neighboring regions of the State 

 and observations in the field indicate that it is more wide- 

 spread than as represented in the table. The larger number 

 of brachiopoda should serve to distinguish the Ames from the 

 other horizons. 



Eight species of pelecypoda are restricted to the Ames, 

 ail of which are rare. Prothyris elegans seems to be every- 

 where found in the Ames when large collections are obtained. 



Four of the 6 species of gastropoda found in the horizon 

 are restricted to it. Bcllcrophov crossus var. u'cwokanus in 

 West Virginia seems to be everywhere found only in the 

 Ames, though not abundant in the collections from Lewis 

 County. 



In addition to the species restricted to the Ames, an 

 abundance of Chonetes granulifer, rather larger on the aver- 

 age than the same species in the Brush Creek, Lcda bellistriata, 

 Deltopecten occidentalis, and ostracoda seem to be characteristic 

 in Lewis County. 



Limestone Nodules 35 Feet above Bakerstown Coal. 

 Only Spirorbis piisillus was found, and in only one locality, in- 

 dicating a local, non-marine fauna. 



Pine Creek Limestone. On account of the fragmentary 

 and comminuted condition of the shells only a few species 



