237 
BPISCOVERY OF A. SECOND EXAMPLE OF THE 
MACROURAN DECAPOD CRUSTACEAN, 
PALAOPALAOMON NEWBERRYI. 
R. P. Wuirrietp, New York. 
The occurrence of decapod crustaceans in the Devonian, or 
Lower Carboniferous strata, is so rare that the discovery of an 
individual is well worth recording; and as Palwopalwomon new- 
berry/ is the earliest or first of the group yet known, its occurrence 
may well be considered as of special importance. 
A few weeks ago [received from Dr. A. 8. Tiffany, of Daven- 
port, Iowa, under the name of Hehinocaris sp., undescribed, a 
fossil crustacean so badly preserved as to be somewhat mislead- 
ing on first examination, but which, on being cleared from the 
rock in some of the critical parts, proved to belong to the genus 
Paleopalwonon, and so far as the specific features can be ascer- 
tained, to be identical with that species described in the Aer. 
Jour. of Science, 3d series, 1880, Vol. 19, pp. 40-41, and subse- 
quently in the Annals of the New York Acad. Set., Dece., 1890, 
ip. 005, Pl. XL, Figs. 19-21.* 
The specimen is of about the same size as that figured as above, 
but much less perfect, as it shows only a part of the carapace, 
the right side and anterior end being quite defective. The basal 
joints of the antennz shown in the first example are entirely ab- 
sent in this one, and the first two segments of the abdomen, 
although present, are so crushed and folded as to be practically 
useless except to_prove their existence. The other four segments 
are fairly preserved, and the central spine of the telson and right 
side of the flap are also tolerably well represented; while parts of 
several of the ambulatory feet can be detected at points in the 
rock. 
No marked variation from the typical specimen can be found 
on this second example. The central or median ridge of the car- 
apace is well marked, and the two halves are slightly disconnected 
along the posterior portion of its length; while the lateral ridge, or 
carination, shown on the type, is strongly marked on the left side 
of the present one, and appears as an elevated line, like a line of 
suture. There is also an area of depression extending from the 
* Figures of this and several other crustaceous fossils were distrib- 
uted on an albertype plate, with copies of the descriptions, extracted 
from the Amer. Jour. Sct., early in 1881, to the number of 150 copies. 
