290 The American Geologist. November, 1893 
i he mycelium, ( No. »>. a magnified part of it), can be seen pitted 
marks of removed tubes. 
Apparently the sporiferous arrangement was not ;i compact 
mass of tubes, covering the whole under surface of the myce- 
lium, as in Polyporus, but consisted of isolated bundles ver- 
tically suspended from the pileiis in stalactitic manner. On 
one Polyporus in my collection, the sporiferous tubes have 
shrunk and torn from each other in irregular, unsymmetric 
masses, but in our Carboniferous genus, we have, it seems, a 
deviation from recent growths. .Judging from the length of 
the tube-bundles, the thickness and length of the trunk, which 
must have been at least one foot, and from the preserved part 
of the pileus, measuring inches across, we have before us a 
very large and most remarkable form of that age. 
It was found in Coal No. 5, Canal Dover, Tuscarawas Co., 
Ohio. 
THE TERMS OF BIOPLASTOLOGY.* 
By Professor A. Hyatt, Boston, Mass., U. S. A. 
I have written the following paper which is an abstract of 
one read before the Boston Society of Natural History, enti- 
tled "Bioplastology and the related Branches of biologic Re- 
search," partly in reply to a critical paper by Mr. Buckman 
and Mr. Bather, and partly as a new contribution in the same 
field. 
I propose to describe in a brief way the four different lines 
of research which are usually designated by the popular terms 
growth, heredity, acquired characteristics, and the correlations 
of development of the individual (ontogeny) with the evolu- 
tion of the group to which it belongs (phylogeny) ; the object 
being to explain the relations of these to each other and to 
give adequate reasons for the substitution of scientific terms 
for the popular names heretofore used. 
Aixiii.iii.v ob Bathmology. 
Messrs. Buckman and Bather, both well known for their 
original and instructive researches on paleozonlogy in England. 
*From "Zoologisehen Anzeiger." No. 426 u. 427. 1893. 
