BRITISH AVONIAN CONODONT FAUNAS 97 
Gnathodus cuneiformis Mehl & Thomas 
Plate 8, figs. 6a—c 
1939 Gnathodus mosquensis Pander ; Cooper (partim) : 388, Pl. 41, figs. 23-25 only ; Pl. 42, 
figs. 75, 76. 
1939 Gnathodus stinus Cooper : 388, Pl. 14, figs. 40, 41. 
1947 Gnathodus cuneiformis Mehl & Thomas : 1o, Pl. 1, fig. 2. 
1962 Gnathodus cunetformis Mehl & Thomas ; Collinson Scott & Rexroad : Chart 3, p. Io, 
2223 
MATERIAL. I specimen : figured, X 98. 
RANGE. Avon Gorge S II. 
DEscRIPTION. This species is characterized by a high, slightly asymmetrical, 
arrow-shaped platform, bearing a single row of nodes on either side of the carina. 
The flanks of the platform are smooth and steep. 
ReMARKS. The shape of the platform and the single row of nodes on either side 
of the carina distinguish this species from other gnathodids. In North America this 
species is characteristic of the Sedalia, Fern Glen and Burlington Formations. 
Gnathodus delicatus Branson & Mehl 1938 
Plate 18, figs. 12a-d. Plate 30, figs. 6a-c 
1938 Gnathodus delicatus Branson & Mehl: 145, Pl. 34, figs. 25-27. 
1938 Gnathodus perplexus Branson & Mehl: 145, Pl. 45, fig. 24. 
1939 Gnathodus texanus (Roundy) Cooper: 388, Pl. 41, figs. 26, 27. 
1951 Gnathodus delicatus Branson & Mehl ; Hass : 394, Pl. 46, figs. 3-7. 
1957 Gnathodus commutatus punctatus Bischoff ; Fliigel & Ziegler : Pl. 111, figs. 16, 17, 24. 
1959 Gnathodus delicatus Branson & Mehl ; Voges: 283, Pl. 33, figs. 31-33. 
1960 Gnathodus delicatus Branson & Mehl; Kronberg, Pilger, Scherp & Ziegler: PI. 4, 
figs. 7-12. 
1962 Gnathodus delicatus Branson & Mehl ; Collinson, Scott & Rexroad : 10, Chart 3, 21, 22. 
1962 Gnathodus delicatus Branson & Mehl ; Higgins : 13, Pl. 3, fig. 33 ; Pl. 2, figs. 23, 24. 
1962 Gnathodus delicatus Branson & Mehl‘ Zeigler: Pl. 4, fig. 4. 
1963 Gnathodus delicatus Branson & Mehl ; Ziegler : 327, Pl. 2, figs. 5, 7, 8, 9, 13, 14. 
1963 Gnathodus delicatus cuneiformis Ziegler : Pl. 2, fig. 12. 
1964 Gnathodus delicatus Branson & Mehl ; Rexroad & Scott : 29-30, Pl. 2, figs. 4-6. 
1964 Gnathodus delicatus Branson & Mehl ; Higgins, Wagner-Gentis & Wagner : 226, Pl. V, 
fig. 24. 
1964 Gnathodus cf. delicatus Branson & Mehl ; Higgins, Wagner-Gentis & Wagner: 226, 
Pl. V, fig. 23. 
MATERIAL. II specimens : figured, X 87, X 426. 
RANGE. North Crop ZLA 5—-ZLA 6, Avon Gorge Z 28-Z 37. 
DESCRIPTION. The asymmetrical platform of this species is ornamented by two 
rows of nodes, one on the narrower inner side, and one on the wider outer side, both 
running parallel to the carina. The inner platform bears a row of up to g denticles 
parallel to the carina, and slopes steeply at its margin. The outer platform bears a 
row of 5 denticles, parallel to the carina, on its inner side, and may also show traces of 
