TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE VII, 
Illustrating Mr. T. West^s paper on New Diatomacese^ &c. 
rig. 
1. — Tnceratium parmulay Br.; 4-sided variety. 
2. — „ venosum, Br. ; front view. 
8. — „ castellaium^ n. sp. ; a, side view ; front view. 
4. — „ radiatuMy Br. ; front view. 
6. — „ intncatum^ T. W. ; a, side view; h, front view of a fila- 
ment ; from drawings kindly furnished by Lieut. -Col. 
Baddeley. 
6. — ,, Brightwelliiy T. W. ; a, side view ; front view (original 
figures). 
7. — „ mnt^Me, Br. ; front view. 
8. — Asterionella formosa, Hass. ; filament of 8 frustules attached ; a, side 
view. 
9. — „ Ralfsii,'W . ^m.-, filament of 6 frustules ; side view. 
.10. — „ BleaJclei/ii,l^ . Sm.; filament of 6 frustules; a, side view. 
From authentic specimens in the collection at the British 
Museum. 
10. * — „ Bleakleyiiy W. Sm., var. ; ( ? ) drawn from specimens ob- 
tained from NocUluca, at Gorlestone ; a^^ side view. 
11. — Podosira (?) compressa^ n. sp. ; filament of 2 frustules ; a, side view. 
12. — Chatoceros armatum, n. sp. ; filament ; a, side view ; b, front view 
of single frustule ; c, one of the long curved horns with 
the delicate setse still remaining attached, after action of 
weak nitric acid. 
13. — „ boreale, Bail. ; British specimen. 
14. — Actiniscus sirius, Ehr. ; British specimen. 
15. — Attheya decora, n. sp. ; frustule with endochrome ; side view; 
b, frustules after burning. 
16. — Closterium aciculare, n. sp. ; frond with endochrome; empty 
segment. 
