. Bulletin of the British Museum (Natural History), Geology. 354 REVISION OF ACTINOPTERYGIAN AND COELACANTH FISHES Description. Through the kindness of Professor Watson I was enabled to examine a superb set of specimens of this genus contained in his collection. From these and from specimens in the a clear picture of the structure of the skull roof of Acentrophorus (Text-fig. 69) was built up. My own observations agree very closely with those of Gill (1923& : 25). The bones of the cranial roof are shown in Dpt *<* jvissc Pmx. Pci : a 5 mm Fig. 70. Acentrophorus varians (Kirkby)
. Bulletin of the British Museum (Natural History), Geology. 354 REVISION OF ACTINOPTERYGIAN AND COELACANTH FISHES Description. Through the kindness of Professor Watson I was enabled to examine a superb set of specimens of this genus contained in his collection. From these and from specimens in the a clear picture of the structure of the skull roof of Acentrophorus (Text-fig. 69) was built up. My own observations agree very closely with those of Gill (1923& : 25). The bones of the cranial roof are shown in Dpt *<* jvissc Pmx. Pci : a 5 mm Fig. 70. Acentrophorus varians (Kirkby). Lateral view of skull, partly after Gill (19236). Text-figs. 69, 70. The parietals are large, rectangular in shape and bear short median and anterior pit lines. The two parietals together form roughly a square over the neurocranium. On either side of the parietals are the somewhat elongated dermop- terotics, roughly the same size as the parietals and having a rounded expansion of their outer borders anteriorly. The frontals are completely fused, and no suture fine could be observed. They form a stout ossification, broad posteriorly, but narrow- ing between the orbits. Anteriorly the frontals abut a median, rectangular postrostral. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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