MARINE BIOLOGICAL STATION AT PORT ERIN. 307 



obtained from the examination of the past year's plank- 

 ton, at Port Erin, has been drawn up by Mr. Chadwick 

 for this Keport. Mr. Chadwick has also provided us with 

 the two carefully drawn plates w 7 hich illustrate this section 

 of the Report, and represent some of the more interesting 

 larval forms captured during the year. 



Summary of Port Erin Plankton in 1899. 



The following summary is the result of careful examina- 

 tion of the series of tow-nettings taken in Port Erin Bay 

 during the year 1899. It has not been possible to identify 

 all the organisms taken, nor yet, in some few cases, to 

 refer them to their respective classes, and this is especially 

 the case with some of the larval forms. All the organisms 

 taken during an hour's tow-netting were examined alive, 

 under a low power, immediately after capture, and the 

 figures on Plates VI. and VII., with which these notes are 

 illustrated, were drawn from living specimens under 

 appropriate magnification. 



The occurrence of Pelagia perla, Gattiola fiiimarchica . 

 Autolytus incertus, and the larvae of PJwronis and Bala- 

 noglossus in Port Erin Bay is here recorded for the first 

 time. With reference to the Medusae, Mr. E. T. Browne 

 writes : — "The occurrence at Port Erin of Pelagia, Mitro- 

 comella, Melicertidium, and Laodice tends to show that 

 you have had a northerly current this summer, bringing 

 down animals through the north channel from the Atlantic 

 shores of Ireland and Scotland." We hope to publish a 

 more complete account of the times of occurrence and 

 distribution of the Medusae at a future time. 



As an example of what may be looked for in a summer 

 tow-netting across Port Erin Bay, the following list of 

 organisms, taken on June 22nd, will be interesting. The 



