. Bulletin of the British Museum (Natural History), Geology. THE OLD RED SANDSTONE OF BROWN CLEE HILL 303 the overlapped area as broad, rapidly deepening grooves that disappear below the surface at the beginning of the exposed area, at the same time giving off six or more shallow radiating canals (seen in the photographs, PI. 47, figs. 2, 4 as narrow grooves) that sometimes branch still further, the canals ending as well-separated pores on the exposed surface of the scale near the hinder margin. In two scales (one each on and ) the undersurface shows the corresponding exit of the
. Bulletin of the British Museum (Natural History), Geology. THE OLD RED SANDSTONE OF BROWN CLEE HILL 303 the overlapped area as broad, rapidly deepening grooves that disappear below the surface at the beginning of the exposed area, at the same time giving off six or more shallow radiating canals (seen in the photographs, PI. 47, figs. 2, 4 as narrow grooves) that sometimes branch still further, the canals ending as well-separated pores on the exposed surface of the scale near the hinder margin. In two scales (one each on and ) the undersurface shows the corresponding exit of the main canal near the hinder margin where it runs backwards and downwards on to the scale it overlaps. A similar, but rather coarser, arrangement can be seen in a single scale of a specimen (No. 41413) of Glyptokpis leptopterus, but the groove of the main canal seems longer and Fig. 58. Impression of Crossopterygian tooth, counterpart of specimen described and figured as Sauripterus anglicus by A. S. Woodward, 1891 : 366, pi. 16, fig. 4. x 3. Some of the scales are over 3-0 cm. high and if in proportion to those of G. lep- topterus would indicate a fish about 120 cm. in length. Woodward referred this species tentatively to the same genus as the American Sauripteris (usually written Sauripterus) taylori Hall but the scales of that fish, of which three1 are figured on Plate 48, are very differently ornamented. In any case Sauripteris is a Rhizodont, whereas the radiating lines of tubercles on the overlapped part of the scales shown in this fish are deemed by 0rvig (1957 : 391) to be the hall-mark of a Holyptychiid. The new genus Pseudosauripterus differs from Glyptolepis in respect of its scales to the same degree that the latter differs from Holoptychius, in the still finer and simpler nature of the ornament on the exposed surface, and may be defined briefly as follows : Holoptychiid fishes in which the external ornament of the scales consists of fine simple ridges
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