CRUSTACEA. 
47 
Observaiions. It has been suggested by Professor Emanuel Kayser (Fauna d. 
eeltst. Devon-Ablagerungen d. Harzes (/oc. cit.), p. 33), that all the pygidia of 
Dalmanites Boothi represented in the Illustrations of Devonian Fossils {loc. cit.), 
do not belong to the same species, and be has consequently divided them in 
the following manner; Fig. 10 (pi. xvi), = Cryphms stellifer, Burmeister; figs. 
8, 11, 14, = Cryphms laciniaius, C. F. Boemer; figs. 3, 6, 9, = Cryphczus Calli- 
teles (Boothii), Green. Our observations do not sustain this sub-division. The 
type of C. stellifer, Burmeister (Organiz. der Trilobiten, pi. iv, fig. 8), shows a 
terminal spine upon the pygidium, exceeding in length any of the marginal 
spines; the same is true of C. Callileles? Kayser {loc. cit., pi. iii, fig. 10). This, 
however, is a feature which has not been observed in any specimen of the New 
York species. C. laciniatus, C. F. Boemer, bears a distinctly triangular caudal 
shield and a very broad terminal lobe, while the C. laciniatus of the Sandbergers 
(Versteinerungen d. Bhein. Schicht. Syst., pi. i, fig. 5c), referred by Kayser to 
C. stellifer, Burmeister, differs in this feature, and if correctly figured, might 
with propriety be regarded as identical with C. Boothi, var. Calliteles. 
Distribution. Upper Helderberg group ? Dalmanites {Cryphms) Boothi. The 
pygidia of this species have been observed in the limestone lying beneath the 
Marcellus shales at the Indian Beservation, four miles south of Buffalo, Erie 
county, associated with Chonetes lineata, Vanux., and Cli. laticosta. Hall. Hamil¬ 
ton group. Marcellus shales ; In the limestone near the top of these shales, on 
Flint Creek, Ontario county; LeBoy and Stafford, Genesee county. Hamilton 
shales; Barely in the sandy shales of the eastern and central counties, at. Bear’s 
Gulf, near Summit, Schoharie county; East Worcester, and elsewhere, Otsego 
county; Cazenovia and Madison, Madison younty; Pratt’s Falls and Delphi, 
Onondaga county; abundant in many localities in the western counties; on the 
shores of Seneca and Cayuga Lakes; in the shales above the Encrinal limestone 
at Menteth’s and Tichenor’s Points, on Canandaigua Lake, and in the towns of 
Hopewell, Gorham, Canandaigua and East Bloomfield, Ontario county; Pavi¬ 
lion and Darien, Genesee county; Jaycox’s Bun, near Geneseo, and Moscow, 
Livingston county; Eighteen-mile Creek and Hamburgh, Erie county. Also 
from Thunder Bay Bun, Michigan. Dalmanites {Cryphaus) Boothi, var. Calliteles: 
