BRITISH AVONIAN CONODONT FAUNAS 119 
process is short, and bears two oral denticles. It is strongly depressed vertically and 
strongly inflexed, forming a right angle in its lateral curvature with the posterior bar 
when viewed from above. The aboral surface of the unit is excavated by a narrow, 
shallow, groove. 
Hindeodella brevis Branson & Mehl 
Plate 31, fig. 17 
1934 Hindeodella brevis Branson & Mehl : 195, Pl. 14, figs. 6, 7. 
1934 Htndeodella cf. byevis Branson & Mehl: PI. 14, fig. 12. 
1956 Hindeodella brevis Branson & Mehl ; Bischoff & Ziegler : 147, Pl. 14, figs. 10, 11. 
1957 Hindeodella brevis Branson & Mehl ; Bischoff: 26, 27, Pl. 6, fig. 24. 
MATERIAL. 17 specimens : figured, X 514. 
Rance. Avon Gorge K 2-Z 38, North Crop 3D 14/15-3D 22. 
DeEscriPTIon. The posterior bar is short, deep, straight and relatively thick at its 
oral edge. It bears on its oral surface four or five major denticles, which increase in 
size posteriorly. They tend to be straight, strongly biconvex in cross-section, and 
only slightly inclined posteriorly. Each is separated by up to 3 smaller denticles, 
which are crowded but discrete. The anterior bar is relatively long, and is bent 
almost at right angles to the posterior bar. Its oral surface bears up to 7 short 
denticles, which decrease in size posteriorly. Each of these major denticles of the 
anterior process tends to be separated by a single smaller denticle. The posterior 
bar is excavated by a shallow groove in its anterior portion, and this flares somewhat 
below the main denticle. 
{ Apical denticle 
Denticles of 
posterior bar 
Anterior bar 
bine tht Anterior 
Posterior 
Posterior bar 
Position of basal cavity 
Aboral edge 
Fic. 24. Huindeodella sp. showing morphological terms used in the text. 
