29 



Station lor Avork of this kind. Tlie univalves of the Station 

 collection have been determined by IMr. H. A. Pilsl)ry, of the 

 University of Pennsylvania, and tlie Splufrhim and Pisidiinn 

 by Dr. V. Sterki. More time could profitably be spent on the 

 biology of the Uiiioiiuhr, l)ut otherwise the notes are ready to 

 <>() into manuscript form. 



The collections of water beetles have been exhaustively 

 studied and determined, l)ut the systematic examination of the 

 immature stages has not yet been reached. 

 Respectfully submitted, 



C. A. Hart, 

 E)i torn olof/ica I . 1 .s-.s iataii t. 



REPORT ox THE SUMMER SCHOOL OF 1898. 



To the Director of t]ic Lahoratorij. 



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 l)v dividing their 



