536 
SILURIA. 
Orthoceras Pomeroense, Portl. Geol. Eep. p. 370 
primajvum, Forbes. Foss. 62. f. 4 
sericeum, Salt. M. G. S. iii. pi. 10. f. 4, 5 
subgregarium, M'Coy, Sil. Fos. p. 9... 
subundulatum, Portl. Foss. 62. f. 3 
tenuiannulatum, M'Coy, Pal. Fos. p. 320 
tenuicinctum, Portl. Foss. 42. f. 3 ... 
tenuistriatum, Miinst. Beitr. 3. pi. 19. f. 4 
textile, Phil. Mem. G-. S. ii. pt. i. p. 353 
torquatum, Miinst. Pal. Fos. App. p. vii. 
tracheale, Sow. (O. perelegans, Salt.?). 
pi. 34. f. 6 : 
tumidum, Portl. Geol. Rep. pi. 28. f. 5, 6 
vagans, Salt. Foss. 42. f. 1 
vaginatum, Schlot. Q. J. Gr. S. vii. p. 377 
ventricosum, Sharpe, Q. J. G-. S. ii. pi. 13 
Oncoceras, sp. Foss. 38. f. 6 
Phragmoceras arcuatum, Sow. PI. 31. f . 3 
compressum, Sow. PI. 31. f . 4 
intermedium, M'Coy. PI. 30. f. 4 
nautileum, Sow. PI. 31. f. 1, 2 
pyriforme, Sow. PI. 30. f. 1-3 
ventricosum, Sow. PI. 32 
Poterioceras approximatum, M'Coy, Sil. Fos. 
p. 10. (Orthoceras subfusiforme, O. 
subpyriforme, Portl.) 
Tretoceras bisiphonatum, Sow. PI. 11. f. 5 ... 
? semipartitum, Sow. PI. 34. f. 5 
Trocholites Hibernicus, Salt. Foss. 43. f. 3... 
Subkingdom VERTEBRATA. 
Class PISCES. 
Auchenaspis ? ornatus (Cephalaspis), Eg. Foss. 
22 f 3 
Salteri, Egert." Q. J.G.S. xiii'.'pl. 11.' f! 4* 5 
Cephalaspis Murchisoni, Egert. Foss. 23. f. 1 . . . 
Oxchus Murchisoni, Ag. PI. 34. f. 1 ; 35. f. 13, 14 
tenuistriatus, Ag. PI. 35. f. 15, 17 
Plectrodus mirabilis, Ag. PI. 35. f. 3-8 
pustuliferus (Sclerodus), Ag. Pi. 35. 
f. 9-12 
Pteraspis Banksii, Huxl. & Salt. Foss. 68. f. 2 
truncatus, Huxl. & Salt. Foss. 68. f. 1 
Spiiagodus pristodontus, Ag. (Skin.) PI. 35. f. 1 
Tiielodus parvidens, Ag. (Shagreen.) PI. 35. f.18 
Note. — There are a few other Lower Paheozoic fossils, mentioned in this work, which 
are not enumerated in the foregoing Table, namely : — 1st. Eozoon Canadense (Foss. 1), 
belonging to the Foraminifera and found in the Laurentian limestone. Eozoon Bava- 
ricum is also mentioned (p. 373). 2ndly, Pal^eopyge Ramsayi (Foss. 2. f. 2), one of 
the Trilobite family ; and, 3rdly, two forms of Oldiiamia (O. antiqua, Foss. 3, and 
O. radiata), quoted in the text as being possibly Zoophytes ; some naturalists, however, 
doubt whether they have claim to more than a vegetable rank. These Fossils, Nos. 2 & 
3, together with the Annelide-markings Akenicolites didymus (Salter), Foss. 2. f. 1, 
A. sparsus (Salter), Histioderma Hibernicum (Kinahan), and Haugiitonia pcecila (Kina 
ban;, belong to the Cambrian rocks — a low zone of deposits (as explained in the text) 
in which scarcely any other fossil is known. 
