34 
more scientific index of a man’s mental qualifications than the shape of his skull, 
and detailed the physical composition of the brain. He condemned in unsparing 
language the cramming process so prevalent in our public system of education, 
and earnestly advocated'the bestowal of more attention upon the physical health 
of the young, in order that their brains miglit first be properly developed. The 
lecturer instanced several men of commanding intellect who had in their youth 
been more noted for athletic skill than for mental attainments. 
“Norges oN Two SPECIES AND ONE GENUS OF FOSSILS FROM THE TRENTON 
Limestone, Ortawa.” Mr. W. R. Bruvinas. 
1. Lichenocrinus eratertformis, Hall.—I have to record the discovery of this 
species in the Trenton Limestone at Rochesterville. _ Previous to this no species 
of Lichenocrinus as been observed in the Trenton Limestone, being confined to 
the Utica Slate and lower part of the Hudson River Group. There are four 
recorded species of this genus, and L. crateriformis is the lowest in ume, it alone 
having been found so low as the Utica Slate, while the others belong to the 
Hudson River Group. My specimens are imperfect, are two in number, and 
were discovered associated with Lixcrophycus Ottawaensis, Paleophycus obscurus, 
Pasceolus globosus, Chetitis petropolitanus, C. discoideus, Ptylodictya acuta, Mur- 
chisonia bellicincta, M. gracilis, Urthis testudinaria, O. subquadrata, Leptena sericea 
and Heterocrinvs Canadensis. ’ 
2. Pleurocystites filitextus, Bill.—This species was founded upon an imper- 
fect specimen which had lost a part of the base containing the greater portion of 
the basal rhomb. The condition of the specimen rendered it doubtful whether 
another specimen, figured on the same plate* belonged to the species under 
consideration or to P. Elegans. During the past summer I was fortunate 
enough to obtain a suite of specimens of LP. filitextus, ranging in size from 0°5 
inch to 1°5 inches in length of body (head of most authors) ; and a careful ex- 
amination has caused me to form the opinion that the figure originally taken as. 
doubtful belongs to this species. The specimens in my possession appear to show 
that the peculiarities of the upper thombs, the size of the irregular plates on the 
ventral side, and the general form of the body, afford excellent specific means of 
distinction, but the basal rhomb in some specimens is hardly distinguishable from 
P. Elegans, while in others it presents the rounded corners of the typical 
specimen. j 
3. Genus Curaboerinus, Bill.—I give a note on this genus principally to 
point out how the freshest beginner in the study of a scientific subject may be of 
use in collecting facts to aid a scientific authority in generalization. The genus 
1 am considering was’founded in 1856, and three species described. A specimen 
of one of these species alone exhibited the azygos plates, the peculiarities of 
which separated the genus from Cyathocrinus. No other species have since been 
described ; nor has the discovery of new specimens been recorded. In the “ Pro- 
ceedings of the Academy of Natural Sciences, Philadelphia,” Nov. 4, 1879, Mr. 
Charles Wachsmuth, the highest American authority on the Paleozoic Crinoids,. 
stated the opinion? that “Carabocrinus is founded upon a malformed or recuper- 
ated Cyathocrinus.” The anomalous form of the azygos plates was dwelt on 
* Fig. 2, Decade 3, G. 5. C. + Revision of the Puieoecrinodea, page 144, 
