TRANSACTIONS OF SCIENTIFIC SECTION. 109 
Figs. 9and 10. Olenoides Stissingensis, n. sp.; the glabella. Fig. 9 
from an artificial cast, Fig. 10 with aside view of the ele- 
vation. 
Fig. 11. 0. Stissingensis, pygidium. 
Fig. 12. O. Stissingensis, pygidium, with four attached thoracic seg- 
ments. 
Fig. 18. A free cheek, associated with O, Stissingensis. 
Fig. 14. Hypostoma of O. Stissingensis. 
Fig. 15. O. Stissingensis, full length, showing eight thoracic segments; 
details of the glabella obliterated or distorted by compres- 
sion, 
Dr. Stevenson nominated for membership of the sec- 
tion, Dr. David B. Ward. 
JANUARY 29, 1889. SIXTY-EIGHTH REGULAR MEETING. 
Dr. Charles B. Warring, chairman, presiding; the 
curator reported that a catalogue of the Herbarium was 
being prepared. The librarian reported the reception 
from Colorado School of Mines, its quarterly publica- 
tion ; also the publication of the Society of Natural His- 
tory, of Glasgow ; also a communication from a society 
of Naturalists at Kieo, asking an exchange of publica- 
tions. 
Dr. David B. Ward, Dr. J. E. Hoffman, and Mr. 
Gilbert Van Ingen, were unanimously elected members 
of the section. 
FEBRUARY 12, 1889. SIXTY-NINTH REGULAR MEETING. 
Charles B. Warring, Ph.D., chairman, presiding; ten 
members and five guests present. 
The chairman, Dr. Warring, read the following papers, 
which were discussed by the members present : 
SOME CURIOUS SIMPLE EQUATIONS. 
It has long been my custom to form, extempore, ex- 
ercises for my classes in Algebra. Once throwing to- 
59 
