142 TJie Americaji Geologist. September, i899 
1885. The others were left in various stages of iiiconi])lete- 
ness at the time of his death. The proposed volumes treated 
of the Sauropoda, the Brontotherida^, the Stegosauria, Thero- 
jroda, Ornithopoda, Mesozoic mammals, and the Ceratopsia. 
Most of the investigations had been completed, a large part of 
the plates and figures engraved, and preliminary descriptions 
published, but the philosophical and phylogenetic problems are 
largely untouched. The loss to science is greatest in the vol- 
umes relating to reptiles, especially the Dinosauria, for in 
this subject Marsh stood as the sole possessor of an acute 
and comprehensive knowledge of one of the most wonderful 
and ditificult groups of vertebrates known. He planned his 
life-work on the basis that immortality is here and not in the 
hereafter. It seemed difficult for him to realize the limita- 
tions of human existence and worldly accomplishment. 
In the midst of his scientific work and while making plans 
for the growth cf the Museum, he was suddenly overtaken by 
the malady which resulted in his death. He died of pneu- 
monia, on March i8th, 1899, in his sixty-eighth year, after 
an illness of about a week. His work as an investigator in 
natural science, his wonderful scientific collections, and his 
munificence to Yale, are his legacies to the higher education 
of mankind. 
Although Marsh was an ardent collector in archeology, he 
published very little on this subject, and his paper (1866) on 
an Ancient Sepulchral Mound near Newark, Ohio, is practi- 
cally the only one. His three mineralogical papers, published 
between 1861 and 1867, show the results of considerable labor 
and careful investigation. They treat of the gold of Nova 
Scotia, a zeolite mineral from the same region, and a catalogue 
of the mineral localities of the maritime provinces of Canada. 
In the field of invertebrate paleontology, he likewise was an 
indefatigable accumulator of material, though after 1869 he 
published nothing in this department. Two papers presented 
some annelids considered as new, from the Jurassic of Ger- 
many. Another showed the origin of the double lobe-lines in 
Ceratites. His papers on American invertebrates comprised a 
description of a new genus of fossil sponge {Brac/iiospo/igia) , 
a new form of crustacean trail from the Potsdam sandstone, 
and a note on color markings in Endoccras. He also showed 
