MARINE BIOLOGICAL STATION AT PORT ERIN. 93 



To tk< ^ea 



of H.U t- 



Enivtinc 



-fed 



PS 



V 



^1 



• I 





IV. 



V 



3 ^ A./ 



£.nHraTvce- 



/A 





on. S»»«vi't- 



of kilt t 



Level "track UoL<Hi'nd* fro 

 Hut viltafA fc Circle 



PLAN OP CIRCLE OF TRITAPHS. 



Fig. 10. 



