Strophomena and Other Fossils 
135 
aberrant specimen of some well known species, for instance, 
Trematospira gihhosa, from the Hamilton of New York. The 
specimen actually found by the collector at Cincinnati might 
have been a specimen of Zygospira cincinnatiensis, but in the 
course of time, by a mixture of labels, the Trematospira was 
regarded as Cincinnatian. To be sure, Trematospira gihbosa is 
figured as having only three plications on the fold and two in 
the sinus, but the type of Trematospira granulifera is supposed 
to be an aberrant specimen. Although intercalated narrow median 
plications are to be expected in Rhynchospira and Homoeospira 
rather than in Trematospira, the former genera have no broad 
median fold and sinus, similar to that of some species included 
in Trematospira. 
Lingula procteri-versaillesensis, var. nov. 
{Plate X, Figs. 8 A, B) 
Lingula procteri was described by Ulrich from specimens which 
passed into the possession of Professor Schuchert, and representa- 
tive specimens were figured by Hall and Clarke in the Paleontology 
of New York, vol. VIH, part 1, plate T, Figs. 5 and 6. These speci- 
mens were obtained at Bank Lick, several miles south of Coving- 
ton, Kentucky, in strata which stratigraphically belong below 
the Fulton layer, and therefore below the Eden. In these speci- 
mens the concrete laterals of the brachial valve are represented 
by semi-elliptical areas bordering the median septum, and are 
traversed by slightly curved, subparallel lines, beginning at the 
median septum and directed obliquely backward, toward the 
postero-lateral margins of the muscular areas. Anteriorly, there 
is a narrow heart-shaped area representing the anterior laterals. 
In the pedicel valve, the sides of the median septum are rather 
strongly divergent, and terminate near the center of the valve. 
The concrete laterals, bordering the median septum, are cunei- 
form in shape, and, together with the median septum, are bounded 
anteriorly by a crescentic line from which a number of short 
lines diverge radially, as in Lingula vanhorni. 
In the Paris division of the Lexington limestone, within the 
city limits of Versailles, Kentucky, a species of Lingula, which is 
practically identical with Lingula procteri in outline, is common. 
The exact horizon is 20 feet below the base of the arch of the 
