S.O 



Fig. 159. Hormiphcra plumosa. A, dissected specimen having rather more than one 

 quarter of the body cut away. 13, transverse section ; diagrammatic, adr. c. adradial 

 canal ; inf. infundibulum ; inf. c. infundibular canal ; int. c. inter-radial canal ; rurd. i: 

 meridional canal ; iiilh. mouth ; orii. ovary ; per. c. pcr-radial canal ; s. o. sense-organ ; .s. pi. 

 swimming-plate ; tpy. spermary ; xtd. stomodamm ; std. c. stomodseal canal ; .s^</. / stunn>d;ral 

 ridges; t. tentacle ; t. li. }>ase <>f tentacle; t. r. tentacular canal ; /. .<(//. tentacular sheath. 



