. Bulletin of the British Museum (Natural History), Geology. . Figs, i, 2. Dipterus valenciennesi S. & M. Skull-roof showing normal pattern. Bannis- kirk, Caithness. Fig. i, Geol. Surv. No. 6464. Fig. 2, (Hugh Miller Coll.). Both X3. 137-139. text-fig. 4) show to some degree brachypygopierus features, that is, the paired bones C are replaced by the forward extension of B, and to a small extent by the medial growth of some of the lateral series K-M, although he notes that it is possible that something very hke the Achanarras type (" D. platycephalits ") occurs v
. Bulletin of the British Museum (Natural History), Geology. . Figs, i, 2. Dipterus valenciennesi S. & M. Skull-roof showing normal pattern. Bannis- kirk, Caithness. Fig. i, Geol. Surv. No. 6464. Fig. 2, (Hugh Miller Coll.). Both X3. 137-139. text-fig. 4) show to some degree brachypygopierus features, that is, the paired bones C are replaced by the forward extension of B, and to a small extent by the medial growth of some of the lateral series K-M, although he notes that it is possible that something very hke the Achanarras type (" D. platycephalits ") occurs very rarely at Banniskirk. One such individual was figured by Pander (1858, pi. i, fig. 2), and his diagram (pi. 3, fig. i) is essentially " normal " in pattern (Text-fig. 10). Of the six specimens available to me that bear original Banniskirk labels and show the roof pattern clearly, four ( 6464, , and ; Text-figs. 1-3) and show the typical normal pattern with 2 " C " plates 1 The initials indicate that the specimen came from the Royal Scottish Museum ; from Professor Watson's collection ; from the Geological Survey ; and from Manchester Museum. Other specimens numbered with or without an initial P, are in the British Museum (Natural History).. 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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