PLATE 15. 
Bathydorus laevis spinosissimus LENDENFELD. 
Figs. 1-4, 6-10, 14, 16-22 — specimen B. 
Figs. 5, 11-18, 15 — specimen A. 
1.— Middle-sized, fairly regular, dermal tetractine (stauractine) of specimen B; magnified 600; phot. 
Zeiss, apochr. 4, compens. oc. 12. 
2.— Small dermal tetractine with rudiment of a fifth ray, of specimen B; magnified 600; phot. Zeiss, 
H. I. apochr. 2, compens. oc. 6. 
3.— Part (three upwardly directed rays) of a middle-sized dermal hexactine of specimen B; magnified 
600; phot. Zeiss, apochr. 4, compens. oc. 12. 
4.— Small dermal diactine with a rudiment of a third ray, of specimen B; magnified 600; phot. Zeiss, 
apochr. 4, compens. oc. 12. 
5.— Large dermal diactine with rudiments of two other rays, of specimen A; magnified 600; phot. 
Zeiss, H. I. apochr. 2, compens. oc. 6. 
6.— Large dermal diactine with a rudiment of a third ray, of specimen B; magnified 600; phot. Zeiss, 
apochr. 4, compens. oc. 12. 
7, 8— Two large gastral pinule-like hexactines with considerably differentiated distal ray, of specimen 
B; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12. 
9, 10.— A dermal tetractine with rays considerably shortened and thickened, of specimen B; magnified 
600; phot. Zeiss, apochr. 4, compens. oc. 12: 
9, focussed lower; 10, focussed higher. 
11.— Part of a large dermal tetractine (stauractine) with one strongly bent ray, of specimen A; magni- 
fied 600; phot. Zeiss, apochr. 4, compens. oc. 12. 
12, 13.— Two rather large gastral, somewhat pinule-like hexactines with only slightly differentiated 
distal ray, of specimen A; magnified 600; phot. Zeiss, apochr. 4, compens. oe. 12. 
14-17.— Distal, more or less differentiated, pinule ray-like rays of gastral hexactines; magnified 600: 
14, 16, 17, of specimen B; 
15, of specimen A; 
14, 15, phot. Zeiss, apochr. 4, compens. oc. 12; 
16, 17, phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 
18.— Large dermal tetractine (stauractine) with one ray considerably shorter than the others, of speci- 
men B; magnified 600; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 
19.— Middle-sized dermal tetractine (stauractine) of specimen B; magnified 600; phot. Zeiss, H. I. 
apochr. 2, compens. oc. 6. 
20.— Large dermal tetractine with somewhat unequally developed rays and a rudiment of a fifth ray, 
of specimen B; magnified 600; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 
21.— Middle-sized dermal tetractine with two rays considerably reduced in length, of specimen B; 
magnified 600; phot. Zeiss, apochr. 4, compens. oe. 6. 
22.— Large dermal tetractine with one ray considerably reduced in length, of specimen B; magnified 
600; phot. Zeiss, apochr. 4, compens. oc. 12. 
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