PLATE 10. 



Sidonops bicolor Lendenfeld. 

 Figures 1-15. 



1-4. — Groups of sterrasters from spicule-preparations; magnified '200 ; phot. Zeiss, apochr. 8, compens. 

 DC. 6: 



1, of a specimen from Station 2958; 



2, of a specimen from Station 3168; 



3, of a specimen from Station 2781 ; 



4, of a specimen from Station 4420. 



5. — Sterraster of a specimen from Station 4551; magnified 300; u. v. pliot. Zeiss, q. monochr. 6, q. oc. 7. 

 G-12. — Groups of euasters from centrifugal spicule-preparations; magnified 300; u. v. phot. Zeiss, q. 

 monochr. 6, q. oc. 7: 



6, of a specimen from Station 3168; 



7, of a specimen from Station 4420 ; 



8, 11, of a specimen from Station 2781 ; 



9, 10, 12, of a specimen from Station 4551 ; 



a, oxyasters; b, strongylosphaerasters. 



13. — Group of euasters from a centrifugal spicule-preparation of a specimen from Station 4551 ; mag- 



nified 300; u. V. phot. Zeiss, q. monochr. 1.7: 

 a, oxyasters; b, strongylosphaerasters. 



14, 15. — Pores in the dermal membrane of a specimen from Station 3168; magnified 75; phot. Zeiss, 



apochr. 16, compens. oc. 4: 



14, a uniporal efferent opening; 



15, a cribriporal afferent opening. 



