. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 6. Neurocranium (lateral view); A. Polyipnus asfero/des; B. Argyropelecus hemigymnus (frontals removed); C. Maurolicus pennanfi; D. Sfernopfyx pseudobscura. Abbreviations: BOC ^:z basioccipifal; BS = baslsphenold; EOC = exoccipital; EPO := epiotic; F rz frontal; HY =: hyomandibular; PA =^ parietal; PRO ^ prootic; PS ::= pterosphenoid; PTO =: pterotic; SOC = supraoccipital; SPO =: sphenotic. are: the epiotics meet below the supra- occipital in sternoptychids, while there is no tendency in this direction in Mauro
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 6. Neurocranium (lateral view); A. Polyipnus asfero/des; B. Argyropelecus hemigymnus (frontals removed); C. Maurolicus pennanfi; D. Sfernopfyx pseudobscura. Abbreviations: BOC ^:z basioccipifal; BS = baslsphenold; EOC = exoccipital; EPO := epiotic; F rz frontal; HY =: hyomandibular; PA =^ parietal; PRO ^ prootic; PS ::= pterosphenoid; PTO =: pterotic; SOC = supraoccipital; SPO =: sphenotic. are: the epiotics meet below the supra- occipital in sternoptychids, while there is no tendency in this direction in Maurolicus and Valenciennellus (Fig. 7); the presence of well-developed parietals with dorso- lateral ridges in sternoptychids, but not in other genera examined; the presence of a well-developed alisphenoid (pterosphe- noid) bone in all genera; and tlie pro- gressive tendency for the neurocranial axis, as measured along the frontal, to assume a more vertical configuration from Polyipmis to Sternoptyx. There is considerable de- velopment of the otic region in Polyipnus. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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