BRITISH AVONIAN CONODONT FAUNAS 129 
Hindeodus alatoides (Rexroad & Burton) 
Plate 31, figs. 7, 10. 
1961 Falcodus ? alatoides Rexroad & Burton : 1152, Pl. 140, fig. 8. 
1964 Hindeodus alatoides (Rexroad & Burton) Rexroad & Furnish : 67, Pl. 111, figs. 18, 19. 
1961 Falcodus (?) n. sp. Rexroad & Collinson : Pl. 1. 
1965 Hindeodus alatoides (Rexroad & Burton) Rexroad & Nicoll: 20, Pl. 2, fig. ro. 
MATERIAL. 3 Specimens: figured, X 193, X 192. 
RANGE. Scotland HOSIE 2B-2C. 
DESCRIPTION. The present specimens are distinguished by the short laterally 
flexed anterior limb, which is deepest and bears the largest denticles distally. The 
apical denticle is only slightly inclined posteriorly and its distal portion is straight. 
It is little compressed laterally. The posterior bar is straight and elongated, its 
length being about three times that of the anterior bar. The denticles are short, 
discrete and bluntly pointed, tending to alternate in size and standing more or less 
erect to the posterior bar in some specimens, but being slightly inclined in others. 
The apical denticle is conspicuously elongated, and has a basal width of up to three 
times that of the adjacent denticles. The denticles of the posterior bar tend to 
increase in size posteriorly. The aboral cavity is relatively small. 
Hindeodus imperfectus (Rexroad) 
Plate 31, fig. 8 
1957 Tvichonodella imperfecta Rexroad : 41, Pl. 4, figs. 4, 5. 
1958 Tvichonodella imperfecta Rexroad ; Rexroad : 26, Pl. 4, fig. 6. 
1961 LElsonella ? imperfecta (Rexroad) Rexroad & Collinson : 6. 
1961 Elsonella ? imperfecta (Rexroad) Rexroad & Burton : 1152, Pl. 141, fig. 1. 
1964 Hindeodus imperfectus (Rexroad) Rexroad & Furnish : 672, Pl. 111, figs. 13, 14. 
1965 Hindeodus imperfectus (Rexroad) Rexroad & Nicoll : 20, Pl. 2, fig. 11. 
MATERIAL. I specimen : figured, X 194. 
RANGE. Scotland HOSIE 2B. 
DeEscrIpTIon. The present specimens are generally fragmentary, but they show 
=, Apical denticle 
Anterior Posterior 
Anterior bar 
aboral 
Outer lateral face margin Posterior bar 
Lateral view 
Fic. 25. Hindeodus sp. showing morphological terms used in the text. 
