. Figure 87.—Fourth cervical vertebra of Tinoceras grande, Marsh (Wo. 1040); front view. FiGORE 88.—The same vertebra; side view. /. lateral foramen; nc. neural canal; z. anterior zygapopliysis; z'. posterior zygapophysis. Both figures are one-fourth natural size. The main dimensions of the fourth vertebra in one species each of Binoceras and Tinoceras are given below. Measurenients of Fourth Cervical J^erteTfra. {Dinoceras mirabile. No. 1255.) m. Length of floor of neural canal, .055 Length of centrum, along under surface, .054 diameter of anterior epiphysis, .079 Vertical diamete
. Figure 87.—Fourth cervical vertebra of Tinoceras grande, Marsh (Wo. 1040); front view. FiGORE 88.—The same vertebra; side view. /. lateral foramen; nc. neural canal; z. anterior zygapopliysis; z'. posterior zygapophysis. Both figures are one-fourth natural size. The main dimensions of the fourth vertebra in one species each of Binoceras and Tinoceras are given below. Measurenients of Fourth Cervical J^erteTfra. {Dinoceras mirabile. No. 1255.) m. Length of floor of neural canal, .055 Length of centrum, along under surface, .054 diameter of anterior epiphysis, .079 Vertical diameter of anterior epiphysis, . .075 Transverse diameter of posterior epiphysis, .091 Vertical diameter of posterior epiphysis, .075 Autero-posterior extent of zygapophyses, i .089 Diameter of lateral foramen, .024 Transverse diameter of neural canal, . Measurements of Fourth Cervical Vertebra. {^Tinoceras grande, No. 1040.) m. Length of floor of neural canal, .-^--. .042 Length of centrum, on under surface of vertebra, .045 Transverse diameter of anterior face, .100 Vertical diameter of anterior face, .094 Transverse diameter of neural canal, .055 Vertical diameter of neural canal, .040 Diameters of lateral foramen, .025-015
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