BRITISH AVONIAN CONODONT FAUNAS 123 
Hindeodella ibergensis Bischoff 
Plate 28, figs. 22-24, 30, 31 
1957 Hindeodella ibergensis Bischoff : 28, Pl. 8, figs. 33, 37, 39. 
1957 Hindeodella ibergensis Bischoff ; Ziegler in Fliigel & Ziegler : 42, Pl. 5, figs. 14, 21. 
1957 Hindeodella germana Holmes ; Ziegler in Fliigel & Ziegler : 41, Pl. 5, fig. 16. 
1958 Hindeodella vedunca Stanley : 466, Pl. 63, figs. 1-4. 
1961 Hindeodella ibergensis Bischoff ; Higgins: Pl. 10, fig. 15. 
1962 Hindeodella ibergensis Bischoff ; Higgins: Pl. 1, fig. 11. 
1963 Hindeodella ibergensis Bischoff ; Bouckaert & Higgins: 17, fig. 3. 
Hindeodella ibergensis Bischoff ; Collinson & Druce in press. 
MATERIAL. 37 specimens : figured, X 170, X 171, X 172, X 173, X 174. 
RanGeE. North Crop 3D 10-3D Ig. 
DESCRIPTION. This species includes greatly elongate hindeodellids, with the oral 
edge crowded with a series of alternating denticles. The aboral edge is straight to 
sinuous. In complete specimens the posterior bar decreases in width progressively 
towards the more or less pointed posterior tip. The main denticle is distinct, 
incurved and posteriorly deflected through 45°, being about twice the diameter of the 
largest denticles of the main posterior series. The antero-lateral process is short, its 
total length being only about one eighth to one tenth that of the posterior bar. Its 
postero-aboral edge makes an angle of approximately go° with that of the posterior 
bar immediately adjacent toit. Its anterior inner edge is flexed slightly inwards and 
there is a series of 3 or 4 recurved, inwardly inclined denticles, which are more or less 
discrete pointed, and decrease in size towards the distal end, which is sharply pointed. 
Both the degree of “‘ hindeodellid ’’ alternation of the denticles of the posterior bar 
and the posterior inclination of the denticles show considerable variation, as also 
does the degree of convexity of the lateral faces of the posterior bar, which tends to 
increase posteriorly. All denticles of the posterior bar are either very closely spaced 
or fused for most of their length, the 3 or 4 which form the posterior end lying almost 
horizontally. 
RemARKS. The only substantial difference between this species and H. cooperi is 
the distinctive denticulation of the anterior lateral process, which in the present 
species extends as far as the aboral tip of the bar, in contrast to H. cooperi where it is 
restricted to the proximal part. 
Hindeodella montanaensis (Scott) 
Plate 28, figs. 21, 26 
1942 Lochreia montanaensis Scott (partim) : Pl. 39, fig. 7, Pl. 40, fig. 18 (non pl. 39, figs. 1 
4,9; Pl. 40, figs. 2, 9, Io, 12, 13, 15, 19). 
1956 Hindeodella bigeniculata Elias (partim) : 106, Pl. 1, figs. 20, 21 (non PI. 1, fig. 16). 
1956 Hindeodella mehli Elias : 108, Pl. 1, figs. 22-24. 
1957 Hindeodella germana Holmes ; Bischoff (partim) : 27, Pl. 6, fig. 32, (non Pl. 6, fig. 34= 
H. secavata Collinson & Druce). 
1958 Hindeodella montanaensis (Scott) Stanley (partim) : 465, Pl. 64, figs. 1-5. 
, 
