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Show 1890.] PROF. G. B. HOWES ON HATTERIA. 359 iii. c3", 240 m m iv. 240 m m v. Senile (-?, 225 mm. vi. §, 220 m m vii. <J, 210 m m vm ix. 2, 182 mm. §, 158 mm. Carcases. "Pro-atlas" present on both sides. present on both sides. present on both sides. present on both sides. present on both sides. Vomerine teeth last traces. absent. present on right side only. absent. present, bilaterally symmetrical. absent. absent. damaged. present on both sides. Five of the above-named specimens are in the teaching collection of the Normal School of Science and Royal School of Mines, S. Kensington; for the opportunity of examining three others Prof. Howes was indebted to his former pupil Mr. A. Vaughan Jennings, who had just returned from JNew Zealand, and for the remaining one he had to thank his Demonstrator, Mr. M. F. Woodward. The occasional absence, mutilation, or reproduced condition of the tail render measurements expressive of the total length of the body of a Lizard of little value. Those given above express the length of the body along the mid-ventral line, from the posterior edge of the symphysis ischii (which can be readily felt through the skin) to the anterior one of the symphysis mandibuli. Fig. 1. Fig. 3. Fig. 2. Hatteria punctata. Fig. 1. Anterior palatal region of skull, showing bilaterally symmetrical vomerine teeth. (Young [sexually mature] tf.) Fig. 2. Similar view of a second specimen, showing asymmetrical condition of the teeth together with their mode of suppression, and apparent duplication on the right side. Fig. 3. Dorsal aspect of the occipito-atlantal region to show the "pro-atlas" in relation (right side) to the occipito-atlantal ligament and skull, and (left side) to the dorsal episkeletal muscles. Eeference letters.-m., dorsal episkeletal muscles ; n.p., posterior nares palatines; pt., pterygoids; vo., vomers; i, "pro-atlas"; ii, atlas; iii, axis vertebra. Four of these showed the teeth in an unmistakable form ; and all which had not been macerated he found, whether teeth were present or not, a couple of thickenings of the mucous membrane, in the region which they occupied, beneath which there lay corresponding ridges of the vomers. He had noted the presence of these 25* |