80 



The cervicals are longer than wide, and considerably compressed in form 

 anteriorly, but depressed posteriorly. This is partly due to pressure, but not 

 wholly ; and it is likely that the posterior centra are about as transverse as 

 in Cimoliasaurus magnus, Leidy ; while the anterior are relatively several 

 times as long. In the length, the latter resemble the English Plesiosauri, 

 in which the centra are also compressed. The compressed anterior centra 

 exhibit a ridge on the side above the middle. A more massive ridge extends 

 between the articular extremities at the lower part of the side, and presents 

 a pit for the parapophysis. The pit for the neural spine is of nearly similar 

 size. Where the cervicals begin to be depressed, two foramina appear neat- 

 together on the inferior face, and the articular extremities display an open 

 obtuse emargination below. They are also emarginate for the neural canal 

 above, so as to have a form approaching a transverse figure 8. In the large 

 posterior cervicals, the sides are contracted both below and at the sides. In 

 all the cervicals, the articular faces are a little concave; in the larger, with some 

 median convexities. 



In none of the dorsals preserved are the diapophyses seen to issue from the 

 centra ; hence the former are probably not posterior in position. The centra 

 soon become smaller than those of the posterior cervicals, and are subround 

 in section, with a well-marked emargination for the neural canal. The sides 

 are gently concave, and are without angulation, but are marked near the 

 articular extremity with short, sharp, and regular undivided ridges, eight in 

 a half-inch. The articular faces are slightly concave and without ridges. 

 There are the two inferior foramina, and one on the lower part of each side. 

 The articular face for the neural arch is an oval pit extending the length 

 of the centrum, and interrupted by some transverse ridges near the middle. 

 The vertebras diminish in size posteriorly. Two centra, probably sacral, 

 resemble the dorsals, but present an extensive vertical articular surface on 

 each side. This facet has raised edges, and terminates above in the longitudinal 

 surface for the neural arch, having thus a T-shape ; it narrows below to an 

 obtuse point, and. no doubt, supported a free diapophysis. 



The fragments of the pelvic and scapular arches indicate that they are 



capacious. The clavicle incloses a large foramen, and is thickened on the 



inner edge. The glenoid surface of the coracoid was wide and subrhombic. 



Some of the other bones are quite thin. The median suture of the ischium 



12 c 



