. Bulletin of the British Museum (Natural History), Geology. CERTAIN TRIASSIC AND LIASSIC PHOLI DOPH O RI D AE 377 The cranial bones are, unfortunately, partly defective ; most bones belonging to the exoskeletal skull roof are lacking and many of the other cranial bones are poorly preserved. Consequently the following description is rather incomplete. Exoskeletal skull roof The premaxillary, rostral, nasal, frontal, supraorbital, dermosphenotic and dermopterotic bones are missing or represented by insignificant fragments. Parts of the parietal and the extrascapular seem to be present {Pal, Ext
. Bulletin of the British Museum (Natural History), Geology. CERTAIN TRIASSIC AND LIASSIC PHOLI DOPH O RI D AE 377 The cranial bones are, unfortunately, partly defective ; most bones belonging to the exoskeletal skull roof are lacking and many of the other cranial bones are poorly preserved. Consequently the following description is rather incomplete. Exoskeletal skull roof The premaxillary, rostral, nasal, frontal, supraorbital, dermosphenotic and dermopterotic bones are missing or represented by insignificant fragments. Parts of the parietal and the extrascapular seem to be present {Pal, Ext?, PL 6, iig. i), but their shape cannot be made out. Dermal bones of cheek and opercular apparatus Only the posteriorly directed lateral part of the comparatively short maxillary is present {Mx + Smxi, PL 6, fig. i ; Text-fig. 5). It is, however, very defective, almost the entire ventral part is missing and consequently nothing can be made out. Fig. 5. Pholidophorns (?) caffii Airaghi. Holotype. Attempted restoration of head in lateral view. X10-5. Ang, angular ; Ant, antorbital ; De. Spl, dentary ; IfOj-Ifo^, infraorbitals i to 5 ; lop, interoperculum ; Mx + Smx^, maxillary and anterior supramaxillary ; Op, operculum ; Pop, preoperculum ; Sbo, suborbital; Smx^, posterior supramaxillary ; Sop, suboperculum ; Acj, anterior division of supramaxillary pit-line; ifc, infraorbital sensory canal; mdc, mandibular sensory canal; orp, postmaxillary pit-line; orp^, oral pit-line ; poc, preopercular sensory 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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