368 



REPORT 1869. 



haematite iron-ore, showing that, after the deposit of the Lias in the vein 

 below, a denudation of the Carboniferons Limestone had been going on ; and 

 above this, again, occurred calcspar and the largest deposits of lead-ore ; 

 aU these changes, and others which might be mentioned, indicate the many 

 conditions that were in operation before the fissure had finally received its 

 contents, whilst still within the ocean's influence, and possibly before the 

 final elevation of the Meudip range. In this district the minerals "prove" 

 near the surface, but they are occasionally found below, and detached 

 crystals of galena are not unfrequent in the Liassic clay at the bottom. 



In the following list, which is extracted from my paper " On the Abnormal 

 Condition of Secondary Deposits," &c., it will be seen what a large fauna 

 occurs within the walls of the lead-vein, that most of the great palaeontolo- 

 gical groups are therein represented, and that they clearly indicate its precise 

 geological age. 



List of Organic Remains from CharterJiouse Lead-mine, 270 feet from the 



Surface. 



Nucula, sp. 



Opis, sp. 



Cerithium gratum, Terq. 



rotiindatum. 



paludinare, Terq. 



Semele, D'Orb. 



Of Liassic Age. 



Chara liassina, Moore. 

 Drift-wood. Jet. 

 Cristellaria rotula, Lamk. 

 costata, D'Orb, 



Dentalina communis, D'Orb. 



obliqua, Limi. 



obliquestriata, Heuss. 



Frondicularia stiiatula, Reuss. 

 Involutina liassica, Jones. 



, sp. . 



Margiuulina lituus, D'Orh. 

 Nodosaria raphanistrum, Linn. 



radicula, Linn. 



paucicostata, Heuss. 



Planularia Bronui, Hoem. 



Textularia, sp. 



Pentacrinites, joints of. 



Cidaris Edwardsii. 



Ecbinodermata, several species. 



Ophioderma, joints of. 



Serpula, sp. 



Pollicipes rhomboidalis, Moore. 



Crustacea, claws of. 



Bryozoa, sp. 



Argiope. 



Crania. 



Lingula. 



Rhynchonella variabilis, Schloth. 



Terebratula punctata, Sou\ 



Spirifer, fragments, several sp. 



Tbecidium Moorei, L>av. 



triangularis, Z>' Orb. 



Zellania Davidsoni, Moore. 



Laboucherei, Moore. 



Lima, sp. 



Plicatula spiuosa, Sou 



Astarte, sp, 



Cardinia multicostata. 



Cucidlsea. 



Leda Hebeili; Martm. 



Chiton. 



Fissurella. 



Melania alternata, Terq. 



Nerinrea Mendipensis, 3Ioore. 



Orthostoma frumentum, Terq. 



triticum, Terq. 



Pleurotoniaria expansa, Soiv. 

 - — ■ — Mendipensis, Moore. 

 Straparollus tricarinatus, Mart. 

 — — Oppeli, Ma7-t. 

 Solarium lenticulare, Terq. 

 Trochus nitidus, Terq. 



edulus ?, Stol. 



, sp. 



Tm'bo, sp. 



, sp. 



Piettei, Martin. 



aranus, Martin. 



Martini, Terq. 



tumidus, Moore. 



Tm'ritella Humberti, Martin. 



Howsei, Moore. 



Ammonites, 2 sp. 



Belemnites acutus, 3Iill. 



Fish remains abundant, including teeth 



• of Acrodus, Hijhodus, Lejndotus, &c., 



representing about ten species. 

 Ichthyosaurus, tooth of. 



Derived from the CAEBONrFEROUs 

 Limestone. 



Helix Dawsonii, Moore. 

 Hj'drob'a, sp. 



Planorbis Mendipensis, Moore. 

 Proserpina Lyelli, 3Ioore. 



