250 LIAS OF ENGLAND AND WALES: 
Zones of Ammonites annulatus } &nd A. serpetitinus (\QG\ud\ng the 
Fish and Insect Limestones and Leptsena Beds). 
Lepidotus gigas. 
Leptolepis concentricus. 
- constrictus. 
Pachycormus curtus. 
- macroptems. 
Tetragonolepis discus-. 
Ainmonitea annulatus. 
bifrons (Fig. 74). 
csecilia. 
communis (Fig. 73). 
cornucopia (Fig. 71). 
crassus (raquinianus). 
elegans (Fig. 75). 
exaratus. 
falcifer. 
- heterophyllus (Fig. 76). 
Holandrei. 
Levisoni. 
lythensis. 
serpentinus (Fig. 70). 
- subplanatus. 
Nautilus astacoides. 
Belemnites quadricanaliculatus. 
- subtenuis. 
tripartitus 
- tubularis (Fig. 78). 
- vulgaris. 
Aniberleya capitanea (Fig. 81). 
Euomphalus (?) 'minutus (Natica pilula). 
Dentalium liassicum. 
Inoceramus dubius (Fig. 80). . 
Lima eucharis. 
Nucula Hammeri. 
Pecten pumilus. 
Posidonomya Bronni (Fig. 82). 
Koninckella (Leptaena) Bouchardi. 
liasiana. 
Leptaena Moorei. 
Rhynchonella jurensis. 
Moorei. 
Waldheirnia Lycetti. 
Serpula. 
Pentacrinus jurensis. 
Ammonites annulatus, A. communis, A. crassus, A.jibulatus, and A. Holandrei 
are species very closely connected. A. elegans, Sow. (often mistaken for A. 
concavus) is regarded as the same as A. complanatus, D'Orb., and A. sub- 
planatus, Oppel, by Tate and Blake.* (See p. 229.) 
* Yorkshire Lias, p. 306 ; see also G. Barrow, Geology of North Cleveland, p. 35. 
