to the ninth cervicals have a vertical ridge connecting the di- and parapophyses on the anterior margin of the centra. This character may also prove to be a feature of this species.
The anterior or median dorsals placed well down on the anterior have two well defined apophyses (See Fig. 13) margins of the centra. The diapophysis is the
Fig. 13. Lateral view of anterior or median dorsals of Baptanodon robustus (No. 919). Type specimen. One half natural size. d., diapophysis ; p., parapophysis; s., spinous process; a. zyg., anterior zygapophysis ; p. zyg., posterior zygapophysis. larger of the two. In these verte-bræ the pedicels of the upper arches are extended antero-posteriorly, being nearly as wide as the centra upon which they rest. The spines are somewhat compressed later-ally, and very high. The arches in what is considered the anterior dorsal region are held together by single zygapophyses, which are of considerable extent obliquely. The pedicels do not project later-ally as in some of the Ichthyopterygians but form a smooth surface with the upper lateral surfaces of the centra. The series of posterior dorsals appear very similar, except in size, to those from this region of B. discus. The single apophyses pos-teriorly recede to the lowermost border of the centra as in the other species.
The parts of caudals preserved, besides showing the rapid decrease in size posteriorly, appear to have parts of several chevrons retained in the matrix near them and furnish the first evidence of these bones in Baptanodon.
All of the vertebræ are deeply biconcave as in other members of the genus.
