. The annals and magazine of natural history : zoology, botany, and geology. of the skull in allits details. This will confirm all the more important con-clusions of Dr. Broom, and in justice to him I can no longerwithhold from publication the paper which he entrusted tome in 1914. One or two miuojk emendations ought, perhaps, to bemade. Thus, the vacuity between the vomers, as it is repre-sented in fig. 1, does not really exist; these bones arewithout thickened margins and meet in the middle line;and, again, the articulaie of the lower jaw is a and important bone. On the o
. The annals and magazine of natural history : zoology, botany, and geology. of the skull in allits details. This will confirm all the more important con-clusions of Dr. Broom, and in justice to him I can no longerwithhold from publication the paper which he entrusted tome in 1914. One or two miuojk emendations ought, perhaps, to bemade. Thus, the vacuity between the vomers, as it is repre-sented in fig. 1, does not really exist; these bones arewithout thickened margins and meet in the middle line;and, again, the articulaie of the lower jaw is a and important bone. On the other hand, there can be no doubt that the cranialwalls include, as Dr. Broom suggests, a large spheu-ethmoid and alispheuoids. These are shown in sectionin the accompanying figures (figs. 4 & 5). The whole anatomy of the skull recalls in a strikingmanner that of Siren or Menopomus, and to my mind Lyso-rophus is without doubt an ancestral Urodele. It presentssome remarkably interesting primitive characters. ^40 On the. Genus Lysoropliu?, Copt^. P Fr ? r—-^ Art. A B Traosvprse sections of skull of Lysorophus, to sLoav the s])lienethiiioid and alisphenoid bonet<. A. Sphenethmnid : frontal; , parasphoiinid ; , prefiuiital;i-Y., pterygoid ; ^ splienethiuoid. B. Alisplienoid (^?l.»S.):Art., articulare of lower jaw ; Pa., parieful ; (iu., quadrate. Fig. 5.
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