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a 
PLATE 49. 
Hyalonema (Prionema) spinosum LENDENFELD. 
Figures 1-23. . 
1-11.— Amphidises; magnified 500: . 
1-4, small micramphidises; phot. Zeiss, H. I. apochr. 2, compens. oc. 6; 
5, small macramphidises; phot. Zeiss, H. I. apochr. 2, compens. oc. 6; 
6, small macramphidise; u. v. phot. Zeiss, q. monochr. 6, q. oc. 7; 
7, 8, normal large macramphidisc; phot. Zeiss, H. I. apochr. 2, oc. 4; 
7, focussed high; 8, focussed low; 
9, normal large macramphidisc; u. v. phot. Zeiss, q. monochr. 6, q. oc. 7; 
10, abnormal large macramphidise; phot. Zeiss, apochr. 4, compens. oc. 6; 
11, normal large macramphidisc; phot. Zeiss, apochr. 4, compens. oc. 6. 
12-14.— Side-views of hypodermal pentactines; magnified 50; phot. Zeiss, achr. aa, compens. oc. 6. 
15-18.— Microhexactines and parts of such; magnified 500: 
15, 18, u. v. phot. Zeiss, q. monochr. 6, q. oc. 7; 
16, 17, phot. Zeiss, H. I. apochr. 2, compens. oe. 6. 
19.— A hexactine megasclere; magnified 50; phot. Zeiss, achr. aa, compens. oc. 6. 
20-22.— Part of a microhexactine; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 
20, focussed high; 21, focussed intermediate; 22, focussed low. 
23.— Part of a ray of a microhexactine; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10, 
