TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE X, 
Illustratiug Dr. Greville's paper on New Diatoms, Series IV. 
rig. 
] . — Stictodiacus Califoniiciis. 
3, o.—S. Kittonianm, x COO. 
4 . — Coscinodisctts 'patelUrform k. 
5. — Tricerathm margin alum, 
iS. — T. indcherrim im . 
7 — 9. — T. Ahercromhieanum. 
10. — T. uiojnnatam. 
11. — T. approximatum. 
12, 33. — T. gratiosum. 
li. — T. vanegatim. 
] 5. — T. nebiilosim. 
16. — AmpMprora conspiciia. 
Ali ilie figures except 2 and 3 are X 400. 
Errata in Series 111.— For Triceratium notahllis and T. iiisignis, read 
T. iiotabile and T. insigne. 
