J. M. Clarke—Devonian Spores. 289 
[have noticed what appears to be a pe yan opening through 
the ~ of the spore into the interior cav 
crospores.— Less abundant than the sence are minute 
beidies associated with them and measuring from one-eighth to 
but showing no structure. ave found no s containing 
them, thou may be that some of the pies cases to be 
found originally enclosed them. These microspores not, 
are known as yet only from sik team ol of 
Bide age, which are found in the township of Hopewell, 
N otwithstanding the great difference in the size 
agreement in more essential features will justify our regarding 
oe as the North American representatives of the Brazilian 
type. 
EXPLANATION OF FIGURES. 
l. Sporangites Huronensis Dawson.—Preserving a thin carbonaceous outer 
wall and alte Fats calcite. Enlarged 10 diameters. From the Marcellus shales, 
anandaigua 
2. ran lee Hur wronensis? Dawson.—Showing the dense wall with thicker 
seat bey interior layers. Interior filled with aga ie rged 20 diameters. 
m rm d 
what — individual of the same, preserving only the 
exterior ayo nda aceous mass at the center. This is the usual cna 
real of tp sede Waa a portion of the wall has been removed. Enlarged 20 
apnea of the — showing the aha alana ripe of calcite 
cavi niar; 
in what may have been the original interior cavity. 0 diameters. 
8. Sporangites ‘(Protosalvinia) bilobata Dawson.—A ge cap containing fou 
macrospores and showing ras of twomore. The structure of the sporoc 
hot well preserved. Enla 0 diameters. Fro: sell calcareous layers of the 
Mar ie ohd.vee. in the town of Haare Ontari 
’ rocarp of the same, em its structure Cia containing three macro- 
Spores, *Guteensd 20 diamete: 
8. The same, with two seneronisibed: Houseel 20 diamete 
9. The nap with but one macrospore. Such forms as Ae ts may be cross- 
rimtos of sporocarps containing more than a single spore. Enlarged 20 
lameters, 
Ng A ei ar section, showing a dehiscent sporoearp. Enlarged 20 diameters. 
A macrospore somewhat compressed and showirg “ apparent opening to 
the | interior cavity, Enlarged 20 5 aaketeni rs. 
12. A section of a macrospore enlarged to show the wabesens 
13. Microspores of this species. Enlarged 20 diamete 
