BRITISH AVONIAN CONODONT FAUNAS 67 
posterior bar is about three times longer than the anterior bar and up to twice as 
deep. The denticles are fine, laterally compressed, needle-like, fused for about half 
their length, and posteriorly inclined at about 60° to the horizontal in the anterior 
third. In the posterior portion, the inclination tends to increase, so that in the 
recurved posterior terminus of the bar, the denticles lie parallel to the main posterior 
bar. The denticles of the posterior bar tend to have a hindeodellid arrangement. 
The posterior bar bears up to 23 denticles, about 18 of which lie anterior to the 
recurved posterior terminus. It has a straight aboral edge in the posterior two- 
thirds. The basal cavity is small and confined to the area immediately anterior to 
the apical denticle. 
Posterior bar Apical denticle 
N q 
nN 
hs ae > ee 
mae ss “sr. 
c 7 
See ie 
2 war 
Bas 
Posterior part 
of posterior bar : 
Anterior bar 
Anterior part 
of posterior bar 
Point of depression 
Fic. 17. Angulodus sp. showing morphological terms used in the text. 
Angulodus sp. nov. B 
Plate 29, figs. 5a, b 
MATERIAL. 8 specimens : figured, X 37. 
LOCALITY AND HORIZON. North Crop, River Clydach, Nr. Gilwern, upper part 
of Lower Z Zone. Sample ZLA 14. 
Rance. North Crop ZLA 8-ZLA 14, Avon Gorge Z 34-C 7. 
DeEscripTion. An Angulodus with robust bar, the short anterior portion being 
depressed and deflected. Posterior bar up to five times as long as anterior, with go° 
posterior depression. Stout discrete denticles. 
The whole unit is robust. The bar bears rather rounded lateral faces, and lacks 
any conspicuous lateral compression. The unit is depressed downward at both the 
