PLATE XXVI. 



Fig. 1. — lophon jiaMlo-digitatus Kirkp. (specimen incrusting an Ophiurid) ; a, embryo with bundle of 



amphityles and ring of anisocheles (x 100) ; 5, tyle of embryo (x 380) ; V, the same (x 1760) ; 



c, c^, anisochele of embryo, front and side view (x 1760), p. 30. 

 Fig. 2. — Hymedesmia exigua Kirkp. ; a, tylote (x 160) ; a}, the same (x 380) ; b, acanthostyle (x 160) ; 



c, pluridentate isancora spatulifera (x 1760) ; c\ the same from above ; d, e, the same, with central 



alae on shaft (x 1760) , /, sigma (x 1760), p. 24. 

 Fig. 3. — Hymerrhaphia rufa Kirkp. ; a, larger acanthostyle (x 160) ; 6, smaller • acanthostyle (x 160) ; 



c, ectosomal anisotornote (x 160) ; d, isancora spatulifera (x 1700) ; e, a variety of the same with 



cup-like ends ( x 700), p. 25. 

 Fig. 4. — Lissomyxilla hanitschi Kirkp. ; a, smooth style (x 160) ; 1), echinating acanthostyle (x 160) ; 



c, ectosomal amphityle (x 160) ; c\ end of same (x 1760), p. 26. 

 Fig. 5. — Ophlitaspongia nidiflcata Kirkp. ; a, smooth style ( x 160) ; h, a smaller curved style ( x 160) ; 



c, a still smaller straight (? ectosomal) style (x 160) ; d, toxon (x 160), p. 25. 

 Fig. 6. — Axinella supratumescens Topsent ; a, large style (x 160) ; b, small ectosomal style (x 160), p. 23. 

 Fig. 7. — Pseudosuberites hyalinus (Ridley and Dendy) ; a, specimen, natural size ; b, vertical longitudinal 



section (x 10), p. 21. 



