Mr. C. Mereschkowsky on Okedenia, Zul. 423 
Chromatophores along the valves, com- 
posed of 8-11 rounded granules ; 
length of the frustule 0:046-0:057 
mm.; ventral margin of the valve 
almMostistralg tise canines yee tes O. granulata, Mer, 
28th June, 1901. 
Fig. 
Fig. 
Fg. 
Fxg. 
Fxg. 
Fig. 
Fig. 
Ing. 
Fig. 
EXg. 
Fig. 
Fig. 
Fig. 
Ig. 
Fig. 
Fig. 
Fig. 
Fig. 
EXPLANATION OF PLATE VII. 
1. Okedenia scopulorum (Bréb.), Mer. Valve-view of a living 
specimen with endochrome. A transitional form to var. 
perlonga, Brun. Black Sea. SS 
2. Ditto. Girdle-face, with endochrome. Black Sea. a 
3. Ditto. Girdle-face. Black Sea. — 
4, Ditto. A dead frustule, with endochrome. Black Sea. = 
5. Okedenia scopulorum, var. delicatula, Mer. Half-dead specimen. 
San Pedro, California. —s 
6. Okedenta scopulorum, var. fasciculata (Grun.), Mer. Valve. 
San Pedro, California, a 
7. Ditto. Girdle-face of a living specimen, with endochrome. 
San Pedro, California. = : 
8. Ditto. Valve of the same individual. ay 
9. Okedenia inflexa (Bréb.), Kul. Valve-view of a living specimen, 
with endocbrome. Black Sea. * 
10. Ditto, in an oblique position. Black Sea. 2, 
11. Ditto. Girdle-face, with endochrome. Black Sea. =, 
12. Okedenia granulata, Mer. Valve-view of a living specimen, 
with endochrome. Very typical. San Pedro, California. a 
13. Ditto. Girdle-face of the same individual. 
14. Ditto. Valve-view of a living individual. San Pedro, Cali- 
fornia. = 
15. Ditto. Girdle-face of a dead frustule, with endochrome. San 
Pedro, California. as 
16. Ditto. Girdie-face of a living specimen. Not typical. San 
Pedro, California. = 
17. Okedenia pontica, Mer. Girdle-face of a living individual, with 
endochrome. Mediterranean (Villefranche). = 
18. Ditto. Valve-face of the same. Villefranche. °©. 
19. Ditto. Girdle-face, with endochrome in not quite fresh con- 
dition. Villefranche, “. 
