Kore) HENRY SHALER WILLIAMS 
incursions of the Hamilton species into the region, rather than to 
the typical Chemung fauna. The Leptodesmas are not abundant 
in typical Chemung faunules although they are abundant in zones 
included in the Chemung formation. 
Goniophora chemungensis (Van.).—In Hall’s monograph on the 
Devonian Lamellibranchiata’ this species is recorded from only the 
localities ““Chemung Narrows and near Owego and Binghamton,” 
all of which localities are estimated to be within the same stratigraphic 
limits, i. e., the Chemung. 
In citing the above specific name, it should be noted that the 
original of the species named Chemung cypricardite (C. chemungensis) 
by Vanuxem? came from a locality “at the small bridge on the road 
to Lisle from Binghamton;” and the specimen coming from Che- 
mung Narrows was described under the name Cypricardites carini- 
jera by Conrad.$ 
Also, a closely related form was described by Conrad under the 
name Cypricardites carinata from “near Oneonta.”4 This latter 
specimen is figured on Plate II of the Fijieenth Annual Report of 
the State Museum.’ Its close resemblance to the form figured by 
Vanuxem is evident. In fact Hall expressed his opinion that the 
original of Conrad’s species Cypricardites carinaius is identical with 
Vanuxem’s Cypricardites chemungensis;° but in his final monograph 
(above referred to), he recognized the two species as distinct. Thusin 
a critical case of identification, when stratigraphic horizon is in doubt, 
care should be taken to make clear the actual difference in form between 
the Hamilton form of the genus and the higher one coming from the 
Chemung. The horizon of the locality from. which the original of 
Conrad’s species Goniophora carinata came is in dispute. Its asso- 
ciation with Paracyclas lirata does not prove it to belong to the 
Hamilton fauna, as pointed out by Prosser.? While the species 
t Paleontology of New York, Vol. V, Pt. I, li (1885), p. 303. 
2 Rept. Third Dist. N. Y. (1842), pp. 179, 181. 
3 Jour. Acad. Nat. Sci. (1842), Vol. VIII, p. 245. 
4 Fijth Ann. Rept. N. Y. Geol. Surv. (1841), p. 53. 
5 1862, Pl. II, Fig. 21. 
6 Hall and Whitfield, Preliminary Notice of the Lamellibranch Shells, etc..(1869), 
Pp: 44- 
7 Seventeenth Ann. Rept. State Geologist, N. Y. (1900), p. 80. 
