TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATES III & IV, 
Illustrating Dr. Greville^s paper on New Diatoms. 
Series XV. 
Kg. 
1. — Clavularia Barbadensis, side view. 
2. — „ „ front view. 
3. — „ „ front view, X 600. 
4. — Synedra clavata, side view. 
5. — Hemiaulus reticulatus. 
0. — 
J3 
mucronaius. 
7. — 
8. — 
punctatus. 
9.— 
pulviiiatus. 
lobatus. 
10.— 
Hemiaulus 
?? tenuicornis. 
11.— 
» 
lyriformis. 
12.— 
53 
angusius. 
13.— 
55 
longicornis. 
14.— 
5J 
alatus. 
15.— 
35 
hastatus. 
16.— 
55 
ornitliocephalus. 
17.- 
Triceratium arcmeosum. 
18.— 
53 
Moronense. 
19. — Enfogonia elegans. 
20. — Hemiaulus exiguus. 
21. — Hemiaulus ?? lyriformis, var. 
22. — Coscinodiscus Mossianns. 
23. — Aulacodiscus gig as. 
24. — Cocconeis naviculoides. 
AH the figures, except fig. 3, x 400 diameters. 
