TIIK .IUHASSIC SYSTEM 



391 



Fossils of the Upper Lias 



Echinoderma, Pentacrinus jurensis. 



Brachiopoda. Rhynchonella jurensis, Waldheimia (Cincta) Lycetti, 



Discini reflexa, Cadomella Moorei. vanS 



Lamellibranchia. Inoceramus dubius, Gresslya donaciformis, Leda ovum, 



Pecten pumilus, Posidonoinya Bronni. 

 Oastropoda. Troclnis lineatus. 



Fig. 128. OROUP OF LIASBIC FOSSILS. 



a. Otopteris obtusa. 

 6. Pentacrinus briareus. 

 c. Ophiodenna Egertoni. 



d. Spiriferina Wnlcptti. 

 . \Valdheiniianumi8malis. 

 /. Kliynchonella riiaosa. 



Cephalopoda. Harpoceras serpentinum, Harp, aalense, Harp, striatu- 

 lum, Dactylioceras commune, Hildoceras bifrons, 

 Dumortieria radians, Belemnites abbreviatus, B. 

 Voltzii. 



Pisces. Lepidotus elvensis ( = gigas), Leptolepis concentricus. 



Reptilia. Ichthyosaurus acutirostris, Steneosaurus Chapmanni. 



Stratigraphy. The Lias occupies the coast of Dorset from 

 Lyme Regis to Bridport harbour, it stretches inland to Ilminster, 



