MARINE BIOLOGICAL STATION AT POET ERIN. 57 



demonstration purposes. Students are therefore strongly 

 advised, especially during University vacations, not to rely 

 upon being able to obtain a suitable microscope, but ought if 

 possible to bring their own instruments. 



Students are advised to provide themselves upon arrival 

 with the " Guide to the Aquarium " (price 3d.), and should each 

 also buy a copy of the set of Local Maps (price 2d.) upon which 

 to insert their faunistic records and other notes. 



Occasional evening meetings in the Biological Station for 

 lecture and demonstration purposes will be arranged from time 

 to time. Apart from these, it is generally not advisable that 

 students should come back to work in the laboratory in the 

 evening ; and in all cases all lights will be put out and doors 

 locked at 10 p.m. When the institution is closed, the key can 

 be obtained, by those who have a valid reason for entering the 

 building, only on personal application to Mr. Chadwick, the 

 Curator, at 3, Rowanv Terrace. 



The Arrow-worm, Sagitta hipunctata. 



[Photo, by Mr. A. Scott. 



