0, 1596. DALMANELLAS OF THE CHEMUNG—WILLIAMS. 41 
Of the species cited above, the one reported from the Hamilton 
under the name Orthis lepida Hall is either identical with Orthis 
lepida Schnur,* which it closely resembles, or else should receive a 
new name, as it was not described till 1860,? after the application of 
the name had been made by Schnur. As it is reported from the 
shores of Canandaigua Lake, it may be appropriately called Dalman- 
ella canandaigquaia. 
AMERICAN SPECIES OF DALMANELLA. 
There are at present known the following species of the group 
Dalmanella, occurring in the rocks of the Devonian of North America 
as high as the Hamilton formation: Dalmanella (lepida Hall, 1860, 
not Schnur, 1853,) canandaiquaia H. S. Williams, 1907, Hamilton 
formation. 
. nfera Calvin, 1878, Chemung formation. 
. leonensis Hall, 1867, Chemung formation. 
. superstes Hall and Clarke, 1892, Chemung formation. 
. carinata Hall, 1843, Chemung formation. - 
. tioga Hall, 1843, Chemung formation. 
SScs 
BRITISH AND EUROPEAN CONTINENTAL SPECIHS. 
The Dalmanellas were early recognized in the European Devonian 
by Sowerby, Phillips, C. Roemer, Vernewil, Schnur, and others, and 
have been described under various specific names. 
Sowerby in 1840 described Ovthis interlineata Walls original 
of Orthis tioga’ was first identified with Sowerby’s species, Orthis 
imterlineata, but as was afterwards discovered Sowerby’s description 
is not fully applicable to the New York form and the new name 
O. tioga was applied to it. In 1841 Phillips revised Sowerby’s spe- 
cles, restricting the name O. interlineata to such forms as were 
moderately wide (a), and assigned a new name, Orthis arcuata, to 
similar broadly elliptical forms from the middle Devonian (0), and 
erected still another species, Orthis parallela (c), for orbicular forms 
in which the greatest width is near the front. (See 7hiemella ville- 
novia on p. 60.)f 
@Paleontographica, XXX, 1853, p. 218. 
ON, ¥. State Gab. Nat. Hist. 13th Rept., 1860, p. 78. . 
© Geol. Trans. London, 2d ser., V. 1840, pl. tiv, fig. 14, and explanation of plate. 
@ Geol. N. Y., 4th Dist., 1843, p. 268, figs. 8 and 4 on p. 267. 
@ JPA, IN, Moy IW, USO 1D, BY JO ase, ess ADA). 
f Phillips’s Pal. Foss. Cornwall and Deyon, 1841, (a) p. 63, pl. xxvi, figs. 106 a, 
Wy Gy Oe Cy Io Go WE (CO) Wr. C45, Toll, xox, mks, TOK, G, Ws CF (GC) j0s G4, Wl, SSat, TERS 
109 a, 0, c, d. 
