74 THE EXTINCT BATRAC111A, REPTIL1A Third eervical : length to shoulder, " opposite posterior angle parapophysis, width between latter points, C 4• least width behind parapopliyses, 44 vertical diameter eup, aC transverse diameter cup, above, Ca cc below', In. 2. 1 1 1 1 1 Lin. 0.75 4.5 10.5 2. 5.25 5.25 11. 2 1 2.25 Fourth cervical : length to shoulder, 'C c C C end parapophysis, Third dorsal : length to shoulder, it it " opposite posterior angle parapophysis, ti •i " of basis of hypapophysis, " width between ends of parapophyses, cc 44 of neural arch just behind diapophyses, •.. 10.5 14.25 33.75 26. CC of anterior cup, 64 of neural arch, vertical diameter neural arch, 2:.?”5 3.25 7.5 CC 44 4i Cup, 19. Fifth dorsal : length to shoulder, " basis hypapophysis, 21. 14. CC iC width of centrtuu at middle, 12.25 Li CC LC euPt 21..25 c: cc vertical diameter at middle, 18. Lumbar : length to shoulder, or r 4,0.0 vertical diameter cup, 20. transverse, 19. Portions of the frontal and parietal bones of a gavial are figured by Leidy (III., fig. 8). They are shown under the head of II. brevispinis not to be referable to the cranium of that species, or of II. tenebrosus ; whether they can be referred to II. obseurus, cordattts, or II. glyptodon is as yet uneertain. This species is no doubt a gavial-like animal, very near the T. obseurus. It is sufficiently different in vertebral strueture ; probably other differences will be found where other bones are known. IIOLOPS GLYPTODON, Cope. Thoracosaurus glyptodon Cope. Geol. Survey of New Jersey, Appendix C. This species is indicated by a few teeth only, but they are of so marked a character as to render their recognition and arrangement proper. The best preserved specimen indicates a slender, subeylindrica1 strongly curved crown, with the acute ridge which divides the planes extending to its base. There are probably nine obtuse ridges on the inner or concave face, each about as wide as each interval. Both ridges and grooves are covered with sharp fine longitudinal striae, which are eontinually iuterrupted and irregular. The pulp cavity, as on others of the genus, is rat her small. Length of crown, 12 lines ; diameter at base, 4.5 1. The apex is slightly compressed and smooth. In an older speeimeu the minute stria are less distinct, leaving the fluting. From Barnesboro, Gloucester Co., N. J. Not found with or near any of the preceding specimens, but with dermal plates not distinguishable from those of IL obseurus.
