182 S. H. Scudder—Structure and affinities of 
quently have seen indications of its capability of resolution 
into lines, in the serrated aspect of its lateral edges. 
I believe that luminous paint enables us to approach very 
nearly, if not completely, to the theoretical limit of the pris- 
matic spectrum. 
The history of these interesting infra-red lines is briefly this. 
y were discovered by me in 2, and an engraving and 
description of them given in the “ Philosophical Magazine.” 
They were next seen by Foucault and Fizeau in 1846, and a 
description of them presented to the French Academy of 
Sciences. They were again detected by Lamanski with the 
thermopile in 1871. Their resolution into a great number of 
finer lines was accomplished b ney, who gave a Bakerian 
lecture describing them before the Royal Society in 1830. 
Finally, they have been re-detected by me in the shining rect- 
angle, just above the theoretical limit of the prismatic spec- 
trum, given by many phosphorescent substances. 
University of New York, Dec. 1, 1880. 
Art. XXI.—The structure and affinities of Kuphoberia Meek 
and Worthen, a genus of Oarboniferous Myriapoda; by 
SAMUEL H. ScuppEr. 
THE genus Huphoberia was established in 1868, for some 
remarkable spiny Myriapoda found in the ironstone nodules 0 
Mazon Creek in Illinois, and which were first fully described 
and figured in the third volume of the Geological Report of the 
Illinois Survey. The only characteristics then noted, in which 
‘they differ from modern types, were the tapering form of the 
body, and the presence of branching spines on all the segments 
in longitudinal rows. An opportunity of examining a series 
of these animals from the same locality, due to the kindness of 
view of the ventral plates, proves that the differences between 
these ancient types and modern forms are so numerous and 
the Diplopoda on the contrary, there are two such ventral 
plates, each bearing a pair of legs, for every dorsal plate (with 
the exception of a few segments at the extremities of the body ). 
