PLATE 55. 
Hyalonema (Phialonema) brevancora LENDENFELD. 
Figures 1-37. 
1.— View of the larger fragment; natural size; phot. Zeiss, anastig. 480/412 mm. 
2,3.— Pentactine megascleres; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
4.— An angularly bent diactine megasclere; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
5.— The centrum of the shaft of a macramphidisc; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, 
q. oc. 10. 
6.— One end of an abnormal rhabd; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
7-12.— Micramphidises; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6: 
7-9, small micramphidises; 
10-12, large micramphidises. 
13.— A small micramphidisc; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 
14, 15.— Macramphidises; magnified 500; phot. Zeiss, apochr. 4, compens. oc. 6. 
16-18.— A terminal anchor of a macramphidisc; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. 
oc. 6: ’ 
16, focussed high; 17, focussed intermediate; 18, focussed low. 
19, 20.— Part of a distal ray (19) and a whole distal ray (20) of a pinule; magnified 2000; u. v. phot. 
Zeiss, q. monochr. 1.7, q. oc. 10. 
21-30.— Side-views of pinules; magnified 300; phot. Zeiss, H. I. apochr. 2, compens. oc. 6: 
21-28, of pentactine pinules with long-spined distal ray; 
29, of a pentactine pinule with short-spined distal ray; 
30, of a hexactine pinule with long-spined distal ray. 
31.— A hexactine megasclere; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
32, 33.— Apical views of the lateral rays of pentactine pinules; magnified 300; phot. Zeiss, H. I. apochr. 
2, compens. oc. 6. 
34, 35.— A whole microhexactine (34) and part of one (35); magnified 500; phot. Zeiss, H. I. apochr. 2, 
compens. oc. 6. : 
36, 37.— Parts of microhexactines; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 
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