382 ME. E. W. HOOLET OX TH.ll [June I913,- 



open valley traverses its length. Pneumatic foramina occur on 

 each side. The ventral surface of the centrum is fiat without any 

 carination, slightly concave at both end's, and at the posterior 

 extremity bifurcated into the usual tuberous processes with the 

 articular convexity between, but dorsal to them. The pre-post- 

 zygapophyses arise laterally near the posterior third of the 

 centrum, and are directed backwards, terminating some distance - 

 from the posterior articulation of the centrum. A restored ventral 

 view of this cervical is given in PI. XXXVIII, fig. 2. 



The last two cervical vertebrae have their zygapophyses laterally, 

 and centra ventrally, much waterworn. The centrum of the pen- 

 ultimate is twice as long as that of the ultimate, and the neural 

 spine has a greater longitudinal width; this may be due in some 

 degree to pressure, for this vertebra is much distorted by having 

 been squeezed against the proximal end of the wing-metacarpal 

 which was lying upon it. These vertebras are shorter and more 

 robust than the cervical above described : they appear to be 

 procoelous. The neural spines are much thickened, especially at 

 their dorsal extremities. The neural arches slightly overhang the 

 centra. The transverse process of the left side of the last cervical 

 is preserved. It shows that the transverse processes were produced 

 outwards, as far as those of the notarium which follow it. They 

 are sent off from the anterior half of the centra. These processes 

 underlie the prezygapophyses, which are produced anteriorly ; they 

 are situated at the base of the neural arches, in front of the neural 

 spines. The postzygapophyses are directed backwards, and over- 

 hang the posterior end of the centrum, thus forming a space into- 

 which the prezygapophyses of the following vertebra enters. The 

 hinder ventral border of the last cervical on the left side has a short, 

 fairly strong, posteriorly directed process, free from the articular 

 surface of the centrum, the hinder extremity of which probably 

 possessed an extra articular facet (exapophysis) as in Ornitlwstoma- 

 (Pieranodon). An ovate pneumatic foramen lies under the lateral 

 base of the neural arches. 



The Notarium. 



The notarium (PI. XXXVIII, figs. 3, 4, & 5) consists of six 

 anchylosed vertebras. The neural spiues are fused into one 

 strong ridge, which, above the first vertebra, is broader than the 

 neural spine of the last cervical ; it diminishes rapidly, until half 

 as thick over the second, third and fourth, expands again at the 

 fifth and sixth, where it is a third greater than at the anterior end,, 

 and becomes remarkably bulbous. There is no supraneural plate, 

 and the surface of the bone shows no trace of such having come 

 away. The dorsal outline of the fused spines is highest between 

 the third and fourth vertebras, as in Ornithostoma. The facet for 

 the scapular articulation was probably beneath this, where on the 

 right side there is a depression (PI. XXXVIII, fig. 3, fa.), which,. 



