PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 939 
cording to Kay this species does not belong to the genus Strophomena, and it 
occurs in Upper Ordovician rocks. Kay states as follows: “Shepard, in 1838, 
described Producta incurvata from near Navarino, at the head of Green Bay,” 
Wis. The northern part of the present city of Green Bay was the town of 
Navarino in 1838. “Strophomena incurvata (Shepard)” has been commonly 
listed in paleontologic synonymy as a Black River or lower Trenton brachiopod. 
No Black River or lower Trenton rocks outcrop in the city. A study of the 
type locality reveals that a species of Rafinesquina is common in the Cincinnatian 
shaly limestones on Ellis Creek, 3 miles east of the city of Green Bay. The 
species is of the genus Rafinesquina, not of Strophomena, and it seems identical 
with the form illustrated by Shepard as Producta incurvata. 
Strophomena incurvata of authors, not of Shepard, a Black River and lower 
Trenton form, is thus a misidentification of Rafinesquina incurvata (Shepard), 
a Cincinnatian species. 
The writer has examined Shepard’s figures of Producta incurvata and inter- 
prets them as belonging to Strophomena rather than Rafinesquina. The only 
way to settle this question is to examine the specimens, but Fenton (1928, 
p-. 147) states that all his efforts to locate them proved futile, and he suggested 
abandonment of the species. 
Kay’s solution of the problem seems only half right. The writer will concede 
the Cincinnatian age of the beds at Green Bay, but the possibility of Shepard’s 
actually having had a Strophomena must not be overlooked. The genus occurs 
with Rafinesquina in Upper Ordovician rocks and cannot be ignored even though 
Rafinesquina is an abundant form at Green Bay. Shepard, in his description, 
speaks of the “shallow valve concave, basal margin incurved” which suggests 
Strophomena. His figure of the interior shows a short median ridge and the 
cardinalia as somewhat excavated, again suggesting Strophomena. Despite the 
generic affinities of the species, it probably belongs in the Upper Ordovician and 
can be dismissed from further consideration in the Middle Ordovician. 
STROPHOMENA INSPECIOSA Willard 
Plate 213, F, figures 26-34; plate 213, G, figures 35-38; plate 262, B, figures 8-11; 
plate 264, B, figures 16-22 
Strophomena inspeciosa WitLarp, Bull. Mus. Comp. Zool., Harvard Coll., vol. 68, No. 6, 
p. 286, pl. 2, fig. 13, 1928. 
As Willard points out, this species is suggestive of Furcitella scofieldi (Win- 
chell and Schuchert) but differs markedly in its internal features. S. inspeciosa 
does not have the convex pedicle valve, and the brachial valve is still more con- 
vex than that of F. scofieldi, The contours of S. inspeciosa are those of the more 
familiar Strophomena. 
Types.—Figured hypotypes: 117725, 117726, 117727a, 117728a.b, 117729a-e. 
Horizon and locality Wardell formation and Wardell part of Dryden forma- 
tion in Tennessee: At the bend of the railroad just west of Liberty Hill, Dutch 
Valley (T.V.A. 154-SE) Quadrangle; 4 mile north of Emory Road, 2 miles 
northeast of Hall Crossroad, Fountain City (T.V.A. 146-SW) Quadrangle; 
Hesperorthis zone, and 40 feet below, Evans Ferry section along U. S. High- 
