PLATE 103. 



Hyalonema (Skianema) umbraculum Lendenfeld. 

 Figures 1-36. 



1-8. — Large macramphidiscs; magnified 100; phot. Zeiss, apoehr. 16, compens. oc. 6: 



1, 3, 5, 7, focussed high (on the uppermost teeth); 2, 4, 6, 8, focussed lower (on the shaft) (1 = 2; 

 3=4; 5=6; 7=8). 



9-13. — Superficial pinules; magnified 300; phot. Zeiss, apochr. 8, compens. oc. 12. 



14-23. — Large macramphidiscs; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6: 

 14-21, side-views; 



22, an oblique view; 



23, an apical view. 



24-26. — Small macramphidiscs; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 

 27-29. — -Small micramphidiscs; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 

 30-34. — Large micramphidiscs; magnified 500: 



30-32, 34, phot. Zeiss, H. L apochr. 2, compens. oc. 6; 



33, phot. Zeiss, apochr. 4, compens. oc. 12. 

 35, 36. — A large micramphidisc; magnified 500; phot. Zeiss, H. L apochr. 2, compens. oc. 6: 



35, focussed high (on the uppermost teeth); 36, focussed lower (on the shaft). 



Hyalonema (Thallonema) geminatum Lendenfeld. 

 Figures 37-62. 



37, 38. — One anchor and part of the shaft of a large micramphidisc; magnified 2000; u. v. phot. Zeiss, 

 q. monochr. 1.7, q. oc. 10: 

 37, focussed lower (on the shaft); 38, focussed high (on the uppermost teeth). 

 39-44. — Microhexactines; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



45-48. — Parts of microhexactines (47, 48) and two whole ones (45, 46); magnified 500; phot. Zeiss, 



H. I. apochr. 2, compens. oc. 6. 

 49-52. — Small micramphidiscs; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 

 53-57. — Large micramphidiscs; magnified 500: 



53, phot. Zeiss, apochr. 8, compens. oc. 12; 



54-57, phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 

 58-62. — Superficial pinules; magnified 300; phot. Zeiss, apochr. 8, compens. oc. 12. 



