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REFERENCE TO THE PLATES OF ORGANIC REMAINS. 
The specimens figured in the following plates arc chiefly in the collections of 
Mr. Gilbertson and the Author. Several are preserved in the Museums of the Y ork- 
shire Philosophical Society, the Natural History Society of Newcastle, and the 
Geological Society of London ; others occur in the cabinets of Sir Philip Egerton, 
liart — Rev. S. Smyth, and Dr. Greene of Dublin, — Mr. Gibson of Hebden 
Bridge,— Mr. Looney of Manchester,— Dr. Moore of Preston, — Mr. Bean of Scar- 
borough, Mr. Prcstwich of South Lambeth, — and others. Some of them now in 
my possession were given me by Lord Cole, Mr. H. Hutton and Dr. Sadleir of Dublin. 
I have thought it useful, in some cases, to mark by abbreviations not only the col- 
lection where the specimen is deposited, but others in which I have seen the same 
species ; it being always understood that the cabinet first referred to is that from which 
my drawing was taken. 
Abbreviations used. 
S. — Sowerby. 
P.— Phillips. 
G. — Gilbertson. 
Y. P. S. — Y orkshire Philosophical Society. 
N. H. S. — Natural History Society of Newcastle. 
G. S. — Geological Society of London. 
Plate I. — Zoopliyta , page 198, <SfC. 
Fig. 
I 6. Retepora membranacea, P. M us. G-, 
7— 10 . R. flabellata, P. Mus. P., G. 
11 , 12. R. flustriformis, P. Mus. P. 
13—15. R. pluma, P. Mus. P-, G. 
16 — 18. R. undulata, P. Mus., P. 
19,20. R. polyporata, P. Ditto. 
21, 22. R. irregularis, P. Ditto. 
23 — 25. R. tenuifila, P. Ditto. 
26 — 30. R. laxa, P. Mus. Smyth, G., P- 
31 — 33. R. nodulosa, P. Mus. P- 
34, 35. Millepora rhombifera, P. Mus. G., P. 
Fig. 
36 — 39. M. interporosa, P. Mus. P. 
40 — 42. M. spicularis, P. Mus. P., G. 
43 — 46. M. oculata, P. Mus. P. 
47, 48. Flustra parallela, P. Ditto. 
49 — 57. Calamopora tumida, P. Mus. P-, N.H-S., 
r. p. s., g. s. 
58 — 60. C. dentifera, P. Mus. G- 
61, 62. C. parasitica, P. Ditto. 
63, 64. C. incrustans, P. Ditto- 
65. Gorgonia ? Mus. G. 
P. 
Plate II. — Zoopliyta, page 201, fyc. 
Syringopora geniculata,P.J'/«s.-P., Y.P.S. 3 — 5. Favosites capillaris, P. Mus. P., Y.P.S. 
S. ramulosa, Goldf. Mus. G., P ., Y.P.S. 6 — 8. F. septosus, Flem. Mus. Y.P.S. 
I i 2 
