800 REPORTS ON THE STATE OF SCIENCE. 
small pulp-cavity, and their typically labyrinthic structure is shown, hot 
only in cross-sections, but also in the longitudinal striation of their 
exterior. 
A comparison of this new fossil with the fragmentary portions of 
mandible from Coton End, Warwick, originally described by Owen! 
under the name of Labyrinthodon leptognathus, can leave no doubt as to 
its specific identity. Its correct generic name, however, still remains to 
be determined, for Labyrinthodon is an undefined term without exact 
meaning. I am inclined to believe that the specimen will eventually 
prove to belong to Capitosawrus, which has already been discovered in 
the English Keuper,” and seems to have been widely distributed in the 
Trias ; but the piece of rostrum associated by Owen with the mandibular 
fragments is insufficient for generic determination, and the undoubted 
mandible of Capitosawrus is still too imperfectly known for comparison.’ 
The precise name of the fossil, however, is of secondary importance. Its 
chief value consists in the manner in which it confirms recent conclusions 
as to the complex structure of the mandibular ramus in the Labyrin- 
thodonts,! and helps to connect these early Amphibians with the 
Paleozoic Crossopterygian fishes. 
Explanation of Plate IT, 
Labyrinthodon leptognathus, Owen : incomplete mandiblé, one-half nat. size.— 
Lower Keuper; Cubbington Heath, Leamington. [British Museum, No. R. 3493.] 
Fig. 1. Upper view. 
Fig. 2: Outer view of right mandibular ramus, 
Fig. 3. Inner view of the same. 
Vig. 4, Transverse section of right mandibular ramus at hinder end of fossil, 
showing extent of internal cavity. 
Fig. 5. Lower view of symphysis. 
Tig. 6, Back or inner view of symphysis. 
agj., angular; d., dentary; ., hollow for insertion of muscle (genio-hyoid ?); 
id., infradentary; 1., shallow fossa for insertion of laniary teeth; sp/., splenial ; 
v., position of inner vacuity; 2’, supposed inner plate of angular; y, supposed inner 
plate of infradentary, 
Report on Footprints from the Trias. Part V. By H. C. Beastry. 
Since the York meeting an opportunity has been afforded of examining 
under very favourable conditions a quantity of material from the Storeton 
Quarries. Owing to the generous response of Mr. Wells, the quarry 
owner, to a suggestion of the Liverpool.Geological Society, the footprint- 
bearing blocks were raised with care and allowed to weather naturally, 
and so the adherent clay was removed without injury to the smaller 
markings. Fortunately the portion of the bed cut through had a very 
smooth surface and was free from desiccation cracks. 
' R. Owen, Trans. Geol. Soc. [2], vol. vi. (1842), p. 516, pl. xliv., figs. 7-9. 
* A. 8. Woodward, Proc. Zoul. Soc., 1904, vol. ii. p. 170, pl. xi. (Capitosawrus 
stantonensis, from Lower Keuper, Stanton, North Staffordshire). 
’ FP. A. Quenstedt, Die Mastodonsaurier (1850), p. 16, pl. ii. fig. 2; H. von Meyer, 
Paleontographica, vol. vi. (1858), p. 228, pl. xxviii, fig. 1; and K. A: von Zittel, 
Handb. Paleont., vol. iii, (1888), p. 404, fig. 396. 
* E. B. Branson, ‘Structure and Relationships of American Labyrinthodontide,’ 
Journ. Geology, vol. xiti. (1905), pp. 568-610, especially figs. 4, 10, and 13. 
