Fig. i . ■'. Horraiphora plumosa. A, dissected specimen having rather more than one 

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

 canal ; inf. infundibulum ; inf. c. infundibular canal ; int. c. inter-radial canal ; mrd^g. 

 meridional canal ; mth. mouth ; ovy. ovary ; per. e. per-radial canal ; s. o. sense-organ ; s, pi. 

 swimming-plate ; tpy. spermary ; std. stomodajum ; std. c. stomodseal canal ; std. r stomodreal 

 ridges ; t. tentacle ; t. b. base of tentacle ; t. r. tentacular canal ; t. ah. tentacular sheath. 



