kxplanation or plate 27 . 
43 
%• 8 . 
«. Tube on the under surface of a scale for the 
passage of the mucous duct. See V. I. Note, p. 
191, 192. (Agassiz.) 
9. Anterior extremity of the lower jaw of Holop- 
tychus Hibberti, from the Lime stone of Burdic 
house, near Edinburgh. See Note, V. I. p. 275. 
The rugged surface of this bone is very remarkable 
(Ilibbert.) 
Fig- 9'. Small teeth of Holoptychus Hibberti, fluted 
externally towards their base, and having a hollow 
cone within. (Ilibbert.) 
9". A small tootli magnified. (Hibbert.) 
‘g- 10. One of the larger teeth in the Jaw of Holop- 
ychus Hibberti, deeply fluted at the base, and hav- 
ing a hollow cone within. None of these teeth have 
sockets, but they adhere by a bony attachment to 
the jaw. (Hibbert.) 
11. looth of Holoptychus Hibberti. (Hibbert.) 
ig. 12 Tooth of Megalichthys Hibberti.* (Hibbert.) 
S®- , 14. Teeth of Holoptychus Hibberti. (Hib- 
bert.) 
^*gs- 1 1. 12. 13. 14 . are from Burdie house. 
5 )( 
1- P. we have quoted iu 
punctate sc.ales , f o' Madeley, lias found two jaws and 
the Coal field of r species, in nodules of Iron stone from 
lites, hones of fishe* found Ichthyodoru- 
oulls of the same Iro.’ Coprolites, forming the nuclei of other 
/If. Murchison hrstm" 
of the Megalichthvs n discovered remains 
species of Unio in (1 /’Ptyclms, and Coprolites, with several 
®auroid fifsheg Wolverhampton Coal field. These great 
1834, have also h were first recognized at Edinburgh, in Sept, 
oastle on Tvno x detected in the English Coal fields of New- 
ytte, Leeds, and Newcastle under Lyne. 
