POBILL CATIONS. 867 
The fauna is of extreme interest, being a pre-Paradoxides fauna in 
which Olenellus is absent. The authorsays: “Though the Protolenus 
Fauna holds the place where we might naturally look for Olenellus, 
the genus is absent, and as so many of the genera associated with it 
are also absent, we cannot regard this fauna as the Fauna of Olenellus.” 
The author points out that in many respects the fauna is more primi- 
tive than the Olenellus fauna. He suggests that the two are contem- 
poraneous, the Protolenus being prelagic, while the Olenellus is a shore 
fauna. Forms present in the Olenellus fauna differentiated for shore 
conditions, are absent in this fauna, calcareous corals and sponges are 
rare, and no Lamellibranch has been observed. Foraminifera belong- 
ing to genera which are today deposited most generally in one thou- 
sand to two thousand fathoms are abundant in some beds, and the 
Gasteropoda are of types adapted for deep water. 
Heretofore the only pre-Paradoxides fauna described has been that 
one characterized by Olenellus, and Mr. Matthew’s paper is of impor- 
tance to geologists in pointing out a new facies of the pre-Paradoxides 
fauna. Ss. Wis 
Republication of Descriptions of Fossils from the Hall Collection in the 
American Museum of Natural Firstory, from the Report of Prog- 
ress for 1861 of the Geological Survey of Wisconsin, by James 
Fall, with Illustrations from the Original Type Specimens not 
lutherto Figured. By R. P. WuitFreLtD. Mem. Am. Mus. 
Nat Elist. Volley Part Te Auoustarsos: 
The republication, with illustrations of the type specimens, of 
descriptions of fossils which were originally published without figures, 
is a most commendable undertaking. It is a work of this kind that 
Professor Whitfield has done. 
In the paper descriptions of forty-three species are republished, 
which are distributed among the fellowing genera: Buthograptus (1 sp.), 
Callithamnopsis (1 sp.), Receptaculites (5 sp.), Graptolithus (1 sp.), Dictyo- 
nema (1 sp.), Melocrinus (1 sp.), Tellinomya (4 sp.), Cypricardites (3 sp.), 
Modiolopsis (2 sp.), Ambonychia (4 sp.), Pleurotomaria (3 sp), Maclurea 
(1 sp.), Ecculiomphalus (1 sp.), Lituites (2 sp.), Cyrtoceras (4 sp.), Onco- 
ceras (5 sp.), Orthoceras (2 sp.), Gontoceras (1 sp.), Zllaenus (1 sp.). 
Thirty-three of the enumerated species are from the Trenton hori- 
zon, four from the Hudson River, three from the Galena Limestone two 
