Antediluvian Zoology and Botany. 277 
‘an 
Spee CC raegieam, 2 
Briarean Pentacrinite. A fragment from the Lias. Pentacrinites Briareus. 
Organic Remains, adopted the classification of Leske; but 
subsequently, in the Introduction to the Study of Fossils, pur- 
sued the more perfect system of Lamarck. 
This arrangement we have endeavoured to illustrate by the 
following ‘Table: — 
RADIATA. 
. Order ECHV NID. 
Divisions. 
EMMESO’STOMI. APOMESO’STOMI, 
Mouth central in base. Mouth towards the mar; in 
of base. 
Classes, Classes, 
$$$ rereee~ ST A 
I. ANocY STI. II. PLevurocy’stt. III. Carocy’stt. IV. PLEvROcY’sTI. 
Vent in the vertex. Vent in the side. Vent in the base. Vent in the side. 
ec 
CLASSES. GENERA. SPECIES, 
Recent | Fossil 
Recent. and Fossil. only, | Total 
1. Echinus, Sea Urchin - 10 7 7 24 
I, Anocfsti. 5 2. Cidaris, the Turban - 4 2 6 12 
3. Clypeus, the Buckler - _ _ 10 10 
4. Cassidulus, Helmet - - ad 3 3 
IJ. PleurocYsti. 5 5. Nucleolites 2 = « _ — 4 4 
6. Echinarachnius, Spider’s Web 1 _ —_ 1 
7. Galerites (Cénulus), Helmet _ _ 20 20 
8. Clypeaster, Buckler - _ 3 | 10 13 
III, CatocYsti. 9. Scutélla, Saucer - = 3 11 doubtf. Ss 17 
10. Fibularia, Button . - — 1 | 14 15 
11. Echindneus - = 3 1 doubtful a 4 
- §/12. Ananchytes, Helmet-shape _ _ 1 12 
IV. Pleuroc¥sti. { 13, Spatangus ae - - 9 3 11 3 
These 13 genera are represented in the following figures, and their names, 
localities, and strata are given below : — 
