NOTES ON A DECAPOD CRUSTACEAN FROM THE 
KINDERHOOK SHALE AT BURLINGTON. 
OTTO WALTER. 
The specimen which is the subject of this paper is the same 
as the one noted by Professor Stuart Weller in his article on 
“The Succession of Fossil Faunas in the Kinderhook Beds at 
Burlington, Iowa. 7,1 The specimen was collected in an argil- 
laceous shale, — bed number 1 of the paper cited, — and was 
among the material illustrating the fauna of that bed submitted 
to Doctor Weller by Professor Calvin and Professor Udden. In 
Weller’s paper, page 69, the specimen is referred with some doubt 
to Palaeopalaemon newberryi Whitfield, with a note that it “is 
probably the same crustacean that Whitfield identified from Cas- 
cade, ” now a part of the city of Burlington. Weller further 
comments that “it is by no means certain that the Burlington 
specimens are identical with the types of the species or even that 
they belong to the same genus.” Whitfield had obtained his 
Burlington specimen from Dr. A. S. Tiffany of Davenport, Iowa. 
According to his description it differs in perfection from the 
one here discussed in having abdominal segments and telson 
both well preserved, while the cephalo- thorax is much less per- 
fect. * 2 In spite of its imperfections Whitfield believed it to be 
identical with his type specimen P. newberryi described 3 some 
years before from the Erie shale at Leroy, Ohio, and re-described 
by Hall and Clarke. 4 The Erie shale is late Upper Devonian in 
age 5 and is thus somewhat older than the bed in which the Bur- 
lington specimens occur. 
The cephalo- thoracic portion only is preserved in the speci- 
men at hand but this part exhibits features not heretofore noted 
in this class of remains. The dorsal and lateral regions of the 
cephalo-thorax are quite perfect and admit of a certain degree 
Uowa Geological Survey, Vol. X. pp. 63-79, 1900. 
2 Amer. Geologist, Vol. IX, p. 237, 1892. 
3 Amer. Jour. Sci., 3d Ser., Vol. XIX, pp. 40-42, pi. (circulated) figs. 1-3, 
1880 ; also Ann. N. Y. Acad. Sci., Vol. V, p. 505, PI. XII, figs. 19-21, Dec., 
1890, and Geol. Ohio, Vol. VII, p. 461, PI. VIII, figs. 19-21, 1893. 
4 Pal. New York, Vol. VII, p. 203, PL XXX, figs. 20-23, 1888. 
5 Geol. Survey Ohio, 4th series, Bull. 15, p. li5, 1912. 
