. Carnegie Institution of Washington publication. liOTHKHMYIMh I IO9 The borders ot the fourth and fifth neurals are 8 mm. thick. On the under side of each is attacht the neural arch of the corresponding vertebra. The eighth neural was not developt and the costals of the seventh and eighth pairs met at the midline. The ninth and tenth dorsal vertebrae and the first sacral appear to have had their arches articulated with the inferioi surface of the seventh and eighth costals at their junction. The accompanying table gives the dimensions of the three posterior neurals. The nuchal bone is urn-sha
. Carnegie Institution of Washington publication. liOTHKHMYIMh I IO9 The borders ot the fourth and fifth neurals are 8 mm. thick. On the under side of each is attacht the neural arch of the corresponding vertebra. The eighth neural was not developt and the costals of the seventh and eighth pairs met at the midline. The ninth and tenth dorsal vertebrae and the first sacral appear to have had their arches articulated with the inferioi surface of the seventh and eighth costals at their junction. The accompanying table gives the dimensions of the three posterior neurals. The nuchal bone is urn-shaped, 90 mm. long, 44 mm. wide in front, 86 mm. across the widest part, and 10 mm. thick. Its free border is acute. The first peripheral measures 58 mm. along its free border; the second. 53 mm. The first appears to have been about 60 mm. high, measured at the suture with the second. The free border of these two peripherals is subacute. The greatest thickness of the second, at the distal end, is 12 mm. < )n the light side most of the peripherals are wanting from rIn- second to the eighth (exclusive of both ); all are missing behind the second on the left side, except one, probably the sixth. The upper and lower faces of this sixth meet at the acute free border at an This border is 45 mm. long and from this the bone rises 56 mm. to the costals. In the restoration (fig. 101J, this bone has been omitted from its supposed place. The lower face of the bone, that proceeding to the plastron, is mostly missing. N'!. 1 11 - â .,., 67 57 ,8 5° +9 angle of about 45°. FlG. roi. Taphrosphys longinuchus. Carapace of the type. / \. 1 Ik sti represent the known bones. pled All of the peripherals have acute tree borders. Of the eighth, that portion to which the inguinal buttress was attacht is broken away. From the free border each of these bones thickens on the under side to half its height, then becomes gradually thinner. The suprapygal is triangular, 62 mm. long and 60 mm. wide
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