i;\ri,ANAri()N ol' I'I.AIKS i-y. 97 



mac Macrnmere. 



m.c Meridional canal. 



ni.f Musclc-tibrcs. 



ni.t'' l)c\el()j)nicntal stage '<\ tlic sainc. 



mic Micromere. 



n , Nucleus. 



n..s.c Non-sexual cell in testis. 



oe Oesophagus. 



oe.br Branch canal of oesophagus. 



ot Otoliths. 



ou.r Outer ring of ciliated rosette. 



ov Egg-cell. 



ov.m Ovarial membrane. 



ovy Ovary. 



p Polar bodies 



pal Palisade cpitheliun^. 



per.c Perradial canal. 



ph Pharynx. 



ph'' Inner section of pharynx (i. e. ])harynx of adult). 



ph''' ( >uter section of pharynx (i. c. part to form sole). 



ph.c Pharyngeal canal. 



ph.f Pharyngeal folds. 



pg Pigment. 



p.p Polar plate. 



r.s .Seminal receptacle. 



r.s.t Tubular part of seminal receptacle. 



s Aboral sense-organ. 



s.f Spiral filament. 



.s.m Superficial membrane. 



spc Spermatocytes. 



spd Spermatids. 



spg Spermatogonia. 



sph Sph i ncter. 



s.ph.c Subpharyngeal canal. 



sphl Eosinophil spherule in collolilast. 



spz .Spermatozoa. 



s.s.p Sulisagittal pouch. 



stm Stomodaeal invagination. 



s.t.c Subtentacular canal. 



s.t.p Subtentacular pouch. 



t Tentacle. 



t.b Tentacle-basis. 



t.c Tentacular canal. 



te Testis. 



te'' Testis developed along supharyngeal canal. 



te.ni Testicular membrane. 



t.r Tentacle-root. 



t.st Tentacle stem. 



