ILLUSTRATIONS 



Chart Mount Desert Island Region. 



Chart eastern side same, showing stations (left and right 



pages). 

 Map of Mount Desert Island, showing shore stations (left 



and right pages). 

 Chart showing kinds of bottom (left and right pages). 

 Mud flats at Narrows. 

 Cliffs, Long Porcupine Island. 

 Tide-pool, tide flowing in. 

 Tide-pool, tide flowing out. 

 Tide-pool near Ship Harbor. 

 Tide-pool same, with S. drobaehiensis. 

 Typical shore Frenehmans Bay. 

 Lophius at float. 

 Dock, loAv tide. 

 Cockpit, winch, etc., in boat. 

 Cockpit, table, sieves, etc., in boat. 

 Dredge and davit. 

 Tooth dredge. 



Laboratory, view from water. 

 View of dock from Laboratory. 

 Laboratory, view from land. 

 Interior of Laboratory, showing arrangement windows and 



aquaria. 

 Interior of Laboratory. 

 Reproduction of dredging station sheet. 

 Reproduction of shore station sheet. 

 Reproduction of plankton station sheet. 

 Pj-rgo bradyi. A. ventral view. B. aperture. 

 Pyrgo elongata. A. ventral view. B. aperture. 

 Discorbis obtusa, apertural region. 

 Acaulis primarius, habitus figure. 

 Obelia gracilis. A. hydrosomes. B. gonosome. 

 Eteone robusta, parapod 21. 

 Scoloplos acutus, lateral view of anterior end. 

 Polydora gracilis, typical large hooks. 

 Brada granosa, ventral view. 

 Ammochares artifex. A. head, dorsal view. B. posterior 



end, lateral view. 



