130 ' Cincinnati Society of Natural History 



those figured by Whitfield in the case of his species, Lingula Elderi. 

 Lingiila procteri was described as ranging from the middle Tren- 

 ton in Central Kentucky, to 50 feet above low water at Covington. 

 The latter includes the strata immediately below the Fulton layer 

 opposite Cincinnati. 



13 — Strophomena higginsportensis, Foerste (Plate I, Fig. 

 9) — Whatever the form may be to which the term Strophomena 

 higginsportensis has been applied, this much progress, at least, has 

 been made — it is now known to belong to the Rogers Gap fauna. 

 Along the Ohio river it was always found loose. At the large 

 quarry east of Ivor, along the Ohio river, in Pendleton county, 

 it has been found impossible to identify the Fulton bed, with its 

 Triarthrus, probably because it is not present, or is represented by 

 lithologically different strata. However, a layer of clay, about 

 5 feet thick, occurs 73 feet above the level of the railroad. In 

 the immediately underlying strata I once found a specimen of 

 Eridorthis, since lost. It probably is from this part of the section, 

 or at least some neighboring part, that the specimens of Stropho- 

 mena higginsportensis were obtained. It is significant, in this con- 

 nection, to note that at this Ivor quarry a single specimen of 

 Orthorhynchiila linneyi was found at track level, at the base of 

 the quarry. The 5-foot clay layer, overlying the Eridorthis hori- 

 zon, may not be the Fulton layer, since the strata above this clay 

 layer contain a fauna quite different from the typical lower 

 Economy. One specimen of Sir. higginsportensis was found at 

 59.1, and another at 54.3 miles from Ludlow. 



l^ — Strophomena hallie, Miller (Plate II, Figs. 5A, B) — 

 Characteristic specimens of this Eden species, both exteriors and 

 interiors, are found at various localities north of Rogers Gap. 

 Their presence has been noted at 59.7, 58.7, 58.5, 58.3, 57.4, 55.7, 

 55.3, 55.0, 54.8, 54.3, and 54.2 miles from Ludlow. The species is 

 very rare below the upper Eridorthis horizon, though fairly com- 

 mon at some horizons above this level. 



As already noted in my paper on Strophomena, Strophomena 

 hallie is regarded as a precursor of Strophomena maysvillensis, of 



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