Jlerieu' of Ilecenf GcoUxjicdl Liferafiiri'. 201 
thew and Gilbert von Ingen. The assemblage of species, to the descrip- 
tion of which most of these pages are given, is an interesting and in 
many respects highly remarkable one. The author's well known keen- 
ness of observation is displayed to admirable advantage in these de- 
scriptions and the accompanying illustrations. Some of the more strik- 
ing elements in the fauna are here briefly noticed : 
The determination of Foraminifera of the genera Oi-halina and Glo- 
higerina (8 species) is one of much interest, originally due to Mr. W. D. 
Matthew. To the Spongida are referred some doubtful bodies designated 
as Monadites, Profospongki and AatvocJadia. The list of Brachiopoda 
presents an assemVjlage of noteworthy forms; typical Lingulellas: Botsfor- 
dia, an oboloid genus founded upon the species Obolus '.' jxdcJier Matth., 
to the illustration of which an entire plate (iii) is given: a species of Obolus 
(0.j:»r/.s^/»».s) which, if correctly referred, is the sole American repre- 
sentative of the genus : the interesting genus Trematobolus, Matthew, 
(type, T. iiisig)iis Math.) anobloid shell with certain siphoHotretid char- 
acters and articulating apparatus is redescribed at length : species of 
Obolella, Linnarsonia, Acrotreta and Acrothele. Among the Mollusca 
are representatives of some interesting genera, such as Orthotheca, No- 
vak, Diplotheca, Matth., with its .septate hyolithoid shell, and Volbor- 
theUa, another septate supposed pteropod. Pehigiella is a new generic 
name introduced for a small spiral Plat}'ceras-like shell, believed to rep- 
resent a heteropod ; P. aflardoides is the type. 
The ostracodes are repi-esented by eighteen species, among them forms 
belongmg to the author's genera Hipponichdrion and Beyrichona, with 
others referred to Primitia, Aparchitea, SchmidfeUa, and Leperditia. 
To the Phyllopoda is doubtfully referred the genus Lepidiita., Matth. 
{L. sigillata, type.) 
The Trilobites present a number of new things : a new genus, Prota- 
graulos (type, P. ^yriacits), founded on a small cranidium of very primi- 
tive type, with un.segmented glaVjella and long eye-lobes : another, Mic- 
macca (type, M. tnattlievi), Vjased on large cejjhala with broad, suV)- 
quadrate, ob.scurely loVjed glabella extending to the frontal margin, and 
elongate eye-lobes. Four species of this genus are described. Berger- 
onia is a new term applied with subgeneric value to a form previously 
described as Pvotolenna elegans, W. D. Matth. The difference from 
ProtoleuKs is stated to be wholly in the f(jrm of the thoracic segments, 
those of that genus being flat, with a diagonal furrow, while in Bcrgef- 
onia they are strongly grooved and geniculate. The list contains also 
species of EUipsoceplndtis and Araloii id, aiv} of the entire number of 
trilobite species, seven are new. The entire favuia lists seventy-four spe- 
cies and varieties. 
In his conclusions the author shows that the Protolenus-fauna, on 
account of the absence of characteristic types, can not be regarded as the 
fauna of Olenellus, whatever its stratigraphical relations to that fauna 
maybe. Further, that the fauna with ProtolcnuH is more primitive 
than that with OlencllKs: as evinced, for example, in the long contin- 
uous eye-lobes of all the triloV)ites ; and also more pelagic, as shown by 
the presence of Foraminifera and Heteropoda. j. m. c. 
