ZONE OF HARPOCERAS SERPENTINUM. 119 



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

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

 Moore, E.G.S.,nowof Bath, but formerly a resident in Ilminster, where he availed himself 

 of exceptional advantages for making his collection. The following is the succession of 

 the beds at Strawberry Bank, near Ilminster, described in descending order.^ 



Section of the Upper Lias at Strawberry Bank, Ilminster. 



a. Yellow micaceous sands of the Inferior Oolite, unfossiliferous. 

 h. Eight bands of clay and stone, containing Ilarpoceras Moorei-=-opalinum, 

 Harp, var labile, Lytoceras insigne = Zone of Lytoceras jurense. 



c. Light blue clay, 4' 6", wdth Crania Moorei. 



d. Three layers of drab-coloured clay and stone, Belemnites 11 minster ensis. 



e. Alternate layers of light-grey clay and rubbly stone, containing Harpoceras bifrons. 



Harp, radians, Harp . falciferum = Zone of Harpoceras bifrons. 



f. Bine mottled clay, with many Foraminifera. 



g. Beds of rubbly stone and light-coloured clays, with Harpoceras serpentinum, 



Stephanoceras commune, Stephan. fbulatum = Zone of Harp, serpentinum. 



h. Concretionary blue clay, with Foraminifera, and a layer of sandy stone, with 

 Bhynchonella Bouchardii. These form the upper Cephalopoda-beds which 

 overlie — 



i. " The Saurian " and " Fish Beds " about twelve inches thick, which consist of 

 a yellow septarian limestone, including Fishes in fine preservation, as Pachy- 

 chormus, Euynathis, Lepidotus, PhoUdophorns, Leptolepis, Dapedium, and 

 Hybodus. The Saurian remains are. Ichthyosaurus acutirostris, Owen, 

 Teleosaurus temporalis, Blainville, Teleosaurus Moorei, Deslongchamps. 

 J. " The Leptaena-beds " consist of thin layers of yellowish clay, resting immediately 

 on the Middle Lias, and forming the basement bed of the Upper Lias. They 

 measure about eighteen inches in thickness, and contain Leptana Bouchardii, 

 L. Moorei, Thecidium rusticum, Spiriferina 11 minster ensis, Zellania liassica, 

 Leptana granulosa, Alaria unispiiiosa, and other Gastropods. 



Mr. Moore's museum in the Philosophical Institution, Bath, contains Teleosaurus, 



Ichthyosaurus, and other Reptiles, and a magnificent collection of Fishes, representing 



many new species of Pachycormus, Lepidotus, and other Upper-Lias forms, in the finest 



possible preservation ; the brown, enamelled scales of the fish beautifully contrasting with 



the pale yellow rock in which they are entombed. It was here likewise that the Leptaena- 



bed was first discovered in England, which contained so many interesting ancient forms of 



1 "Middle and Upper Lias of the South-west of England," ' Proc. of the Somerset Archaeol. Soe.,' 

 p. 16, vol. xiii, 1865-6. 



