PLATE 1. 



Geodinella robusta Lendenfeld. 



Figs. 1-4, 16, 18-24. — var. megasterra Lendenfeld. 

 Figs. 5-12, 17. — var. carolae Lendenfeld. 

 Figs. 13-15. — var. megaclada Lendenfeld. 



1-4. — Cladomes of monaencs of the var. megasterra; magnified 100 : piiot., Zeiss, apochr. 16, compens. 

 oc. 6: 



I, 2, of plagiomonaenes witli a blunt clade; 



3, of an orthomonaene with a pointed clade; 



4, of a plagiomonaene with a pointed clade. 



5-11. — Teloclades (teloclade-cladomes) of the specimen of var. carolae from Charlotte Sound; magni- 

 fied 100; phot., Zeiss, apochr. 16, compens. oc. 6: 



5, a plagiodiaene with short, blunt rhabdome; 



6, a plagiomonaene with angularly bent rhabdome; 



7, 8, cladomes of plagiodiaenes; 



9, a regular plagiomonaene; 



10, cladome of an orthomonaene with not quite terminal, pointed clade; 



II, cladome of a plagiomonaene with short, blunt clade. 



12. — The specimen of var. carolae from Naha Bay; natural size; phot., Zeiss, anastig. 167. 

 13-15. — Cladomes of monaenes of var. megaclada; magnified 100; phot., Zeiss, apochr. IG, com- 

 pens. oc. 6: 



13, of an orthomonaene with not quite terminal clade; 



14, of a simple plagiomonaene; 



15, of a plagiomonaene with a secondary clade below the cladome proper. 



16. — The specimen of var. megasterra; natural size; phot., Zeiss anastig. 480/412. 



17. — The specimen of var. carolae from Charlotte Sound; natural size; phot., Zeiss, anastig. 480/412. 

 18-20. — Plagiomonaenes of var. megasterra; magnified 30; phot., Zeiss, planar 20. 



21. — Axial section of var. megasterra; magnified 6; phot., Zeiss, planar 50: 



a, cortex (sterraster-armour) ; b, choanosome. 



22, 23. — Amphioxes of var. megasterra; magnified 30; phot., Zeiss, planar 20. 



24. — The specimen of var. meyas^erra halved: the cut surface; magnified 6, phot., Zei.ss, planar 50: 

 a, cortex (sterraster-armour) ; b, choanosome. 



