PLATE 57. 



Hyalonema (Prionema) azuerone Lendenfeld. 

 Figures 1-23. 



1-5. — Macramphidiscs and parts of such; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 12: 



1, a large macramphidisc with broad anchors; focussed lower (the shaft in focus); 



2, the broad terminal anchor represented in fig. 3, focussed high (the uppermost teeth in focus); 



3, the broad terminal anchor represented in fig. 2, focussed low (the shaft in focus); 



4, one (the upper) terminal anchor of the macramphidisc represented in fig. 5, focussed higher (the 

 uppermost teeth in focus); 



5, a large macramphidisc with narrow anchors, focussed lower (the shaft in focus). 

 6-8. — Mesamphidiscs; magnified 500: 



6, 7, medium mesamphidiscs; phot. Zeiss, apochr. 4, compens. oc. 12; 



8, large mesamphidisc; phot. Zeiss, apochr. 8, compens. oc. 12. 



9-12. — Stout-shafted micramphidiscs; magnified 500; phot. Zeiss, apochr. 4, compens. oc. 12: 



9, a large one; 



10-12, small ones. ' 

 13-17. — Slender-!5hafted micramphidiscs; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 

 18. — The central part of a microhexactine; magnified 2000; u. v. phot. Zeiss, q. monochi-. 1.7, q. oc. 10. 

 19-22. — Microhexactines; magnified 500; phot. Zeiss, apochr. 4, compens. oc. 12. 

 23. — The centrum and one ray of a microhexactine; magnified 2000; u. v. phot. Zeiss, q. monochr. 

 1.7, q. oc. 10. 



1 



