PLATE 23. 
Holascella taraxacum LENDENFELD. 
Figures 1-3. 
1.— Portion of the distal part of a longitudinal ray of a large choanosomal hexactine; magnified 600; 
phot. Zeiss, apochr. 4, compens. oc. 12. 
2, 3.— Two distal ends (anchor-heads) of anchoring spicules; magnified 600; phot. Zeiss, H. I. apochr. 2, 
compens. oc. 6. 
Holascella ancorata LENDENFELD. 
= Figures 4-25. 
4.— A part of a ray of a principal tetractine where regeneration took place; magnified 600; u. v. phot. 
Zeiss, q. monochr. 6, q. oc. 10. 
5.— A microdiscohexactine; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
6, 7.— The central parts of a microdiscohexactine (fig. 6) and a hemidiscohexaster (fig. 7); magnified 
2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 
8.— A microoxyhexactine; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
9.— View of the specimen; magnified 1.4; phot. Zeiss, anastig. 167 mm. 
10.— Portion of a group of microscleres from a spicule-preparation; magnified 600; phot. Zeiss, H. I. 
apochr. 2, compens. oc. 6: 
a, aray of a microdiscohexactine; b, rays of microonychhexactines. 
11.— The distal part of a ray of a microonychhexactine; magnified 2000; u. v. phot. Zeiss, q. monochr. 
Lengo. 10) 
12, 13.— The distal ray of two superficial hexactines; magnified 200; phot. Zeiss, apochr. 8, compens. 
oc. 6: 
12, of a hypodermal hexactine; 13, of a hypogastral hexactine. 
14.— Group of microscleres from a spicule-preparation; magnified 200; phot. Zeiss, apochr. 8, compens. 
oc. 6: 
a, microdiscohexactines; b, a microonychhexactine. 
15.— Fragmentary onychhexasters; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
16.— A ray of a microonychhexactine; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12. 
17-25.— Six distal ends of rays of discohexasters, hemidiscohexasters, or microdiscohexactines; magni- 
fied 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 
Of four there is only one view (figs. 19-22). Of one (figs. 17, 18) there are two views (fig. 17, focussed 
lower, fig. 18, focussed higher), and of another (figs. 23-25) there are three views (fig. 23, focussed high, 
fig. 24, focussed intermediate, fig. 25, focussed low). 
