ZONE OF AMMONITES COMMUNIS. 



87 



fragments of Pentacrmus. The shells were compressed moulds, which looked beautiful 

 when the clay was first split open, but as it dried, the fossils unfortunately broke into 

 fragments. 



4th. The Leptsena bed is composed of a brown friable marl, one to two inches thick ; 

 it contains many species of small Bracliiopoda, belonging to the genera Lepfana, Spirifera, 

 and Terebratula, and is separated from the upper beds of the Marlstone by — 



5th. A thin band of blue and yellow clay, containing many Ammonites faldfer. Sow., 

 Belemnites acuarius, Schloth., and Brachiopoda, as Mhynclionella pygmcBa, Moore. This 

 bed rests upon light-coloured marls of the Spinatus stage. 



Prom a railway cutting near Stroud, I have obtained many fine specimens of 

 Ammonites serpentinus. Rein., and during the execution of works for drainage, and the 

 formation of a new road near Nailsworth, a good section of the Upper Lias was exposed ; 

 from the bands of limestone numerous fossils were obtained, as Ammonites communis, Sow., 

 A. bifrons, Brug., A. falcifer, Sow., A. Iieterophyltus, Sow., A. cornucoina, Y. and B., 

 A. Lythensis, Y. and B., Belemnites compressiis, Voltz., Nautilus latidorsat/is, d'Orbig., 

 Turbo capitaneiis, Miinst., Pleurotomaria sub-decorata, Miinst., Astarte lurida, Sow., 

 Posidonomya Bronni, Voltz., NucuJa Ilausmanni, Roem., Gresslya greyaria, Roem., Lima 

 bellula, Mor. and Lye, Lima yiyantea, Sow., Tancredia Iceviuscida, Lye, and several 

 undescribed forms. 



The Upper Lias at lUminster, Somerset, has become famous for the large number of 

 species it has yielded to the long, patient, and careful investigations of Mr. Charles Moore, 

 late resident in that locality. The beds here consist^ of — ■ 



1. Rubbly beds G — 10 feet, containing Ammonites communis, Sow., A. falcifer, 

 Sow., A. Baquinianiis, d'Orbig,, A. bifrons, Brug., A. radians. Rein., A. insignis, 

 Schiibl. 



2. Clay, 8 inches, 



3. Yellow limestone, 3 — 4 inches. 



4. Layers of clay, 18 inches, Leptcena Pearcei, Dav. 



5. LeptfEua bed, 1 inch, Lejjtaena Moorei, Dav., L. Bouchardii, Dav., L. Hasina, 

 Bouchard. 



6. Marlstone, 2^ inches, resting on greenish sand, containing Belemnites 4 inches 

 and Marlstone. 



Mr. Moore's museum contains Teleosaurus, IcJdliyosaurus, and other reptiles, a 

 magnificent collection of fishes, representing many new species of Pacliycormus, Lejndotus, 

 and other Upper Lias forms, in the finest possible preservation, the dark, enamelled scales 

 of tbe fish contrasting finely with the pale yellow rock in which they are entombed. 

 It was here likewise that Mr. Moore first discovered the Leptasna bed which contained 



1 Davidson's ' IMonograph on British Oolitic and Liassic Brachiopoda,' Palgeontographical Societv, 

 part 3, p. 17, 



