02 PALYEONTOLOGY OF NEW YORK. 
Phanerotinus— the latter name being more properly applicable than Ecculi- 
omphalus. 
The species has lived in a soft calcareous mud, which has been largely com¬ 
posed of organic exuviae. The specimens are usually in a fragmentary and 
unsatisfactory condition. The only nearly entire specimen has, in addition to 
the dorsal cicatrices, almost the whole upper surface covered by small frag¬ 
ments of other organisms. 
Formation and locality. In the shales of the Hamilton group at York, in Liv¬ 
ingston county, N; Y. 
Euomphalus (Straparollus) clymenioides. 
PLATE XVI, FIG. 15, and PLATE LXX, FIGS. 1-5. 
Euomphalus clymenioides, Hall. Descriptions of New Species of Fossils, etc., p. 26. 1861. 
“ “ “ Fifteenth Rep. N. Y. State Cab. Nat. Hist., p. 54. 1862. 
“ (Straparollus) clymenioides. Hall. Id., p. 166, pi. 6, figs. 1 and 2. 1862. 
“ clymenioides. Hail. Illustrations of Devonian Fossils: Cephalopoda, pi. 70, figs. 1-5.* 1876. 
- - - Illustrations of Devonian Fossils : Gasteropoda, pi. 16, tig. 15. 1876. 
Shell discoid. Spire depressed below the plane of the outer volutions. Volu¬ 
tions about four or five, lying nearly in the same plane, slender and very 
gradually expanding, rounded above and below, the lower side the more 
convex ; the section transversely ovate, narrower on the ventral or inner 
side of the volutions; the vertical and transverse diameters about as 
twelve to thirteen. Aperture transverse, subovate. Diameter of shell in 
the largest specimen seen, about two inches. 
Surface unknown. 
This species is known to me in the condition of casts only, but its form and 
proportions furnish marked characters. The casts sometimes show impressions 
of transverse strife, which at intervals have apparently been crowded in fascicles. 
The spire is more depressed than in E. piano discus of the Goniatite limestone, 
while in that species the section of the volutions is nearly circular. The inner 
volutions are much more depressed than in E. Hecale of the Chemung group. 
* The arrangement of this species with the Cephalopoda was made without the author’s knowledge—the 
lithographer having completed his work before attention had been called to the subject. 
