130 
mg the toothed borders and the basilar divergence of the lateral primary 
nerves, our species is still so distantly related to the living ones of the genus 
that even the question might be disputed there, whether it should be placed 
in a separate genus or not. At all events Sassafras primigenium, Sap., from 
the Eocene beds of Sezanne, still possessing divergently curved basilar nerves, 
might be considered by its untootlied leaves to be rather a transitory form 
among those already mentioned ; whilst Sassafras ferretianum, Massal., from 
the younger Tertiary beds, is closely allied to the living S. officinale by its 
convergentlv curved basilar nerves and its untoothed margin.* 
Locality and Horizon. — Between Hill and Watson’s shafts, in white 
pipeclay, from the Old Rose Valley Lead, on the Main Vegetable Creek Deep 
Lead, Emmaville (Vegetable Creek Township). 
S ANTAL A CHE. 
Sant alum Erazeri, sp. nov. 
Plate XI, Figs. 18-21. 
Sp. Char. — S. foliis breviter petiolatis coriaceis, ovatis vel lanceolatis, 
basi acutis, apice acuminatis, margine integerrimis ; nervatione camptodroma ; 
nervo primaria tenui, recto ; nervis secundariis subangulis variis acutis 
orientibus tenuissimis vix conspicuis. 
Ohs . — The leaves arc small, coriaceous, sliort-petioled, entire, and 
varying in form from ovate to narrowly lanceolate. Their apex is more or 
less tapered, and their nervation imperfectly developed, as both tertiary nerves 
and network are wanting. These leaves show a great similarity to those of 
Santalum osyrinum, Ett., from the older European Tertiary Elora. They 
may be, perhaps, identical, but a decision on this point may lie reserved 
for future investigation. A very similar analogy to our fossil species is 
Santalum americanum , Lesq., from the Elora of the Green River Group, 
and it seems to differ only by a thicker and shorter petiole. 
Locality and Horizon. — Old Rose Valley Lead, with the preceding. 
* Relating to the above stated phylogenetic facts on the forms of Sassafras, it may be remarked that the 
fossils named and described as S. germanicum and S. JEsculapi, by Heer, do not belong to Sassafras. The former 
should be placed in Acer, and the latter referred to Cinnamomum polymorphum. Respecting the S. JEsculapi, 
the author observes that the leaves are membranaceous. But, as the qualities of both form and nervation 
exactly agree with those of Cinnamomum polymorphum, a mistake may have occurred. I suppose that Heer 
figured in this case only counterparts of leaf-fossils of C. polymorphum, and as they are often pallid when 
weathered, he has erroneously taken them for membranaceous leaves of another kind. 
