1138 General Notes. 
illustrated by a woodcut; while a table is added giving the geo 
logical range of the genera Echinocaris, Elymocaris and Trop. 
docaris. a 
Two new genera (Elymocaris) with a new species (Æ. siligua), 
Tropidocaris with three species (T. bicarinata, T. interrupta and 
T. alternata) are described, also Echinocaris socialis, n. sp. The 
illustrations are excellent. Every distinct, well preserved formal — 
this group is of the greatest interest, and good figures of them , 
are of special value. The point of greatest value in the paperis — 
the identification and illustration of the mandibles, as Mn 
Beecher claims them to be; they are very large, heavy and rè- — 
markably different from those of Nebalia, the existing type of the 
order. 
Niagara Fossits—Descriptions of a number of new species 
of Niagara fossils are published in the Bulletin of the Museum of 
the University of the State of Missouri, Vol. 1, No. 1, dated May, 
1884, and with the above title. es 
The paper is written by Professor J. W. Spencer, of the Uni- 
versity of Missouri, and contains sixty-two pages and nine p i. 
It is divided into three parts, as follows: Part I. Graptolitidæ o 
the Upper Silurian system; Pt. 1. Stromatoporidæ of the Upper 
Silurian system ; Pt. 111. Fifteen new species of Niagara fossils 
The great majority of the specimens upon which the new sp% — 
cies are based are from the Niagara shaly dolomite rocks : 
Hamilton, Ontario, Canada, and the types are in the private cak — 
lection of Professor Spencer. A 
Among the Graptolites twenty new species and one rg go 
are described: Phyllograptus ? 1, Dendroga aa e 
i us 2, AGa ha, aE 
graptus 3, Dictyonema 2, Calyptograpt eee ae new spe 
cies of the Dictyonema is from the Clinton group. - ae 
Four new species of Stromatoporide are described fr N 
From the Hamilton, Ontario, beds fifteen new pet eee 
ing to the following genera, are described: Paleeaster, F Crania, 
Polypora, Rhinopora, Clathropora?, Lingula, went | 
Pleurotomaria, Conularia, Orthoceras, Cyrtoceras, pee “Jn th 
In regard to the Graptolites the author remar ks ones pet 
following descriptions I have often been compelled f bran 
almost entirely upon the size of the stipes and mode 
ing, as the cellular structure has been oblitera co ae 
of cases, even where the general form of the fr ond is PF 
distinct.” : son 
This remark draws attention to the evident imperfec’ is ve 
of most of the specimens described and figured, “_ 
