English: Explanation of Plate 1

Thalattosaurus alexandrae. Type specimen. All figures three fourths natural size.

• Fig. 1 Anterior portion of cranium and mandible. Cranium slightly distorted, the anterior end of the maxilla being covered.
• Fig. 2 Palatal view of cranium.
• Fig. 3 Inner side of mandible.

LEGEND:

• F, frontal
• Pf,prefrontal
• N, nasal
• A, doubtful element anterior to narial opening
• Pm, premaxillary
• M, maxillary
• L, lachrymal
• Pl, palatine
• J, jugal
• V, prevomer
• I, inferior nasal opening
• Sa, supra-angular
• An, angular
• D, dentary
• Sp, splenial

a, b, c, sections of cranium. See Pl. II, figs. 1a, 1b, 1c.

N and A in fig. 1 are situated in the superior nasal opening.