1908] PcuhalUnv, Fossil Plants from Milwaukee, Wisconsiit. 11 
us to determine its relation to known species in a more thorough 
and satisfactory manner. I therefore call it N cmatphyciis mil- 
ivaukccnsis. 
Fucus bertheletensas n. sp. (Plate IT.) 
Specimen No. 2, bearing the museum number 399, presents the 
form of several strap-shaped organs lying in parallel positions, 
and representing probably, the subdivisions of one plant. When 
first examined by means of a photograph, showing the plant on 
a reduced scale, it was believed to be comparable with Zostero- 
phyUnni myretonianum, Penn.^, from the Devonian of Scotland, 
but a later study of the actual specimen showed that such a com- 
parison is in no sense justified. 
As shown by the photograph, the plant is represented by a 
series of 16 linear members projected in a parallel manner. In 
three separate places it may be seen that the members subdivide 
by a regular dichotomy, and the conclusion is justified that such 
dichotomy is characteristic of the plant as a whole. 
The plant has been carbonized, but instead of a very thin filmy 
layer of carbon as would be obtained from plants of the type of 
Zostera, the deposit is somewhat bulky, and, indeed, represents the 
entire structure. The organs are obviously thicker in the midcfle 
where there is evidence of a structure comparable with a midrib 
as presented by the medullary region of many of the Phseophy- 
ceoe. Individually, the various members are linear, 4-7 mm. 
broad and distinctly dichotomous, the largest fragments showing 
simple branches 18 cm. in length. 
From these facts it is evident that the plant must have been 
possessed of rather thick and bulky parts, the structure of which 
was not only susceptible of somewhat ready decay, but which was 
entirely carbonized. Like N ematophyciis, it was evidently of an 
aquatic habit. All of these considerations point with some force 
^ Can. Eec. Sc., 1892, 9. 
