6 
PALEONTOLOGY OF NEW YORK. 
in further illustration of the species, retains the pygidium and indications 
of ten segments. The former fragment has a length of 155 mm., and a 
width of 130 mm.; the latter a length of 220 mm., and a width of 150 
mm. These specimens were obtained by Mr. Louis Bevier, of Marbletown, 
Ulster county. They are beyond doubt representatives of the largest known 
species of this genus, and were two of the largest known trilobites. Mr. Whit¬ 
field estimates the entire length of the specimen described by him, as restored 
from proportions furnished by other species, at fifteen and one-half inches. 
With the figure of the larger specimen here given is an outline restoration, the 
data for which have been derived from a careful summary of measurements of 
species in which the pygidium is strongly annulated. The result indicates an 
individual measuring 374 mm. or 14.95 inches in length, and 145 mm. or 5.8 
inches across the base of the cephalon. This outline will help the student to 
realize, better than may be done from the figure of the fragment alone, the 
colossal size attained by this species. 
Fragments of Homalonoti of large size have been described by other authors. 
Salter has referred (Palaeontogr. Soc., vol. xvii, p. 109) to a large specimen of 
Homalonotus rudis, which he estimates may have been a foot in length when 
entire. Beushausen has figured a pygidium of Homalonotus gigas, F. A. Roemer, 
from the Spiriferen-sandstein of the Hartz Mountains (Beitr. zur Kenntn.- Ober- 
harz. Spirit. Sndst’ns, pi. i, fig. 1. 1884), which measures 94 mm. in length, 
and though proportionally narrower than the pygidium in H. major, represents 
an individual probably not much shorter than the one here illustrated. It is 
noteworthy that this large species, Homalonotus gigas, is from a lower Devonian 
formation, not widely differing in age from the horizon of Homalonotus major. 
In the distinctly annulated pygidium, Homalonotus major agrees with the major¬ 
ity, if not with all the species of Homalonotus known from Silurian and lower 
Devonian horizons, and in this regard differs from Homalonotus Dekayi of the 
Hamilton group, in which the annulations are faint or obsolete. 
Distribution. The locality of these fossils as given by Mr. Bevier, for the 
specimen here figured, is “ Lower Oriskany, bank of 4th Binnewater, Rosendale, 
Ulster county,” and for the type specimen, “ Upper Oriskany, Cranberry Dam, 5th 
