44 £. A. WALFOED Olf THE STEATIGEAPaiCAL 



series C^ at Hook Xorton. Its Cotteswold position is the Upper 

 Trigonia-grit. 



Teigonia Beesletais^a, Lye, appears to be restricted to the sub- 

 zone of Am. Soiverbyi at Coombe Hill, near Banbury, whence many 

 specimens have been collected. The beautiful shell so well delineated 

 in Lycett's Brit. Poss. Trigonise, pi. xvii. fig. 4, has been in my 

 collection for nearij^ fifteen years. 



Tkigoot:a cosiata, Sow., begins with a representative of the 

 T. sculpta type at the top of series B, and ranges through C at Hook 

 JS^orton and Otley Hill and through the Clypeus-grit in the various 

 Oxfordshire localities, where it attains a fine development. Wright 

 quotes the species from the zone of Am. jurensis^ and Etheridge from 

 the Lincolnshire Limestone, whilst Lycett gives its Cotteswold stages 

 from the Eagstones upwards. 



Teigonia pullus, Sow., appears in bed B^. In series C also at 

 Hook l^orton many small and a few average-sized specimens have 

 been found. Its range through the other beds is demonstrated by 

 fine local examples from the Stonesfield Slate, the upper zone of the 

 Great Oolite, and the Forest Marble ; Lycett gives it from the zone of 

 Am. Murchisonce upwards. 



Teigonia i)e:n^tictjlata, Ag., ranges from C to E, and exhibits, in 

 Hook-Norton shells especially, the delicate ornamentation of the 

 area in a beautiful state of preservation. In the West of England, 

 according to AYitchell *, it begins in the " Cynocephala-beds " ; other 

 lists show that it apparently survived through the Great Oolite 

 period. 



TEiGoinA SCULPTA, Lyc, makes its appearance in well-developed 

 forms at the top of bed B^ at Hook Xorton, and in series C at Sbarps- 

 hill is more doubtfully recognized, associated with Gervillia Icevis &c. 

 It ranges through the whole of the British Inferior-Oolite zones. 



Teigonia Windoesi, Lye, lias hitherto been recorded only from C 

 of Hook I^orton. Young specimens of T. Painei, Lye, from the 

 earthy limestone at the base of the Fuller's Earth near Bourton-on- 

 the-Water, come near to this little shell. 



Geeat Oolite Species. 



Teigo^^ia impeessa, Sow. Stonesfield Slate, Stonesfield. 



Teigo^^a tjot)Tjlata, Fromh. Great Oolite (lower zone), Culworth, 

 jS'orthamptonshire, and at Milton and Tainton Down near Burford, 

 Oxon. The Trigonice at Culworth are associated with Ostrea Sowerhyi 

 and Rhynclionella mncinna in some limestone courses which alternate 

 with beds of marl. 



Teigonia MoEETOifi, Mor. & Lye. Stonesfield Slate, Stonesfield, 

 Great Oolite, Kirtlington, Oxon and Buckingham t, and Forest 

 Marble, Islip and Kidlington f. 

 \ * ' G-eology of Stroud,' by E. Witchell, F.G.S., p. 35. Stroud, 1882. 



t ' Geology of the Country round Banbury ' &c., by A. H. Green, Mem. Geol. 

 Survey. 



