96 T. KOMAI : STUDIES ON TWO ABERRANT CTENOPHORES 



EXPLANATION OF PLATES 1-9. 



Abbreviations. 



a.f Accessory illament of tentacle. 



a.f'' Develojnnental sia^e of Ihc same. 



lial ISalaiiccr of otolithic mass. 



l)r. c Uraiichitig canal-system. 



c Com] 1- plate. 



c.a Central area of polar plate. 



c.c , Ciliated cell. 



c.f Central filament. 



eg Clear gland cell. 



eg' Senescent stage of tlie same. 



cil Cilia. 



cil.tr Ciliated tract. 



col CoUoblast . 



cor Excretory cfirpusclc in gaslro-v'ascular canal. 



c.spli Central sjilieroidal Ixxlv of colloblast. 



c.'it (Jell -strand . 



cu Ciliary covering of alioral sense organ. 



d.t Dorsal tentacle. 



E Macromeres of siil)tciilaciilar octants (end-cells). 



ei-3 Micromeres Imdded off from end cell. 



cc Ectoderm. 



ec.pl Ectoplasm. 



cm ICgg-membrane. 



en lOndoderm. 



cn.pl Endoplasm. 



en.s Endodermal sac. 



ent.c ■. Entiance-cone. 



eo Eosinophilous body in parencliynie tissue. 



ex.c I'Lxcretory canal. 



ex.p Excretory pore. 



f , Food-matter. 



fl I'lagella. 



g.g Granular gland cell. 



gr (Jranular layer. 



g.s Cenital sinus. 



li I lead of colloblast. 



i Iiifundibulum. 



i.c Interstitial cell. 



inf.c Infundibular canal. 



in.r Inner ring of ciliated rosette. 



M Macromeres of subpharyngeal octants (middle cells). 



m Mouth. 



ni' Mouth (.f adult. 



niI-3 Micromeres budded of from middle cell. 



m.a Marginal area of polar plate. 



