29 
Station for work of this kind. The univalves of the Station 
collection have been determined by Mr. H. A. Pilsbry, of the 
University of Pennsylvania, and the Spheriuwm and Pisidium 
by Dr. V. Sterki. More time could profitably be spent on the 
biology of the Unionidae, but otherwise the notes are ready to 
eo into manuscript form. 
The collections of water beetles have been exhaustively 
studied and determined, but the systematic examination of the 
immature stages has not yet been reached. 
Respectfully submitted, 
C. A. Hart, 
Entomological Assistant. 
REPORT ON THE SUMMER SCHOOL OF 1898, 
To the Director of the Laboratory. 
Sir: Of the fifteen persons in regular attendance at the 
Summer School twelve were either teachers, or preparing to 
teach, in our public schools. Five of them had received train- 
ing in the laboratories of the University of Illinois, but nearly 
all of them were without any considerable experience in field- 
work or in the methods of collecting and preserving aquatic 
organisms. On this account especial prominence was given to 
tri-weekly excursions for collecting and field observation, and 
these furnished probably the most important elements in the 
work of the session. With the steam launch, row boats, and 
needful collecting equipment of the Biological Station the entire 
party made trips to Matanzas, Thompson’s, and other lakes 
within reach of Havana. The use of the Station launch made 
the excursions highly enjoyable, and by reducing to a minimum 
the time en route gave the party ample opportunity for observ- 
ing, collecting, and preserving such animals and plants as 
would best repay further study, or would be useful in the 
laboratories or museums of the high schools in which the various 
teachers present were interested. The work done in the labora- 
tory by the several members of the School was largely determined 
- by their past experience and the application to be made of the 
knowledge acquired. 
Soon after the opening of the session it became evident that 
the needs of the students would be best met by dividing their 
. 
