EEMAINS OF REPTILES AND FISHES. 75 



lengthwise. The margins of the articular surfaces are reflected, 

 so that in section the faces of the body would present a sig- 

 moid curve from the centre to the margin. The height is a 

 little more than the breadth, and the circumference at the sides 

 and below is well rounded, though there is here and there a 

 tendency to angularity; but whether this arises from original 

 conformation or from accidental and unequal reflection of the 

 margin, cannot be determined. The upper margin of the anterior 

 face is produced a little in the centre, forming a rounded ele- 

 vation immediately below the neural arch, and is angulated at 

 the flanks. The same region in the posterior face presents a 

 shallow concavity, exactly similar to that represented in Prof. 

 Huxley's figure referred to. 



The sides of the body are somewhat concave, and transversely 

 wrinkled or coarsely striated. The minute notochordal foramen, 

 which is only large enough to admit a stout knitting needle, is 

 difiicult to determine, though there can be no doubt of its ex- 

 istence. 



The neural arch is comparatively small ; it is oval, the long 

 axis being perpendicular. The lips of the arch are produced a 

 little in front ; behind they do not appear to be so. The walls of 

 the arch are very stout and pass upv/ards to form a long high 

 spinous process, which is nearly as high as the centrum, and is 

 thin, being much compressed laterally. 



The anterior zygapophyses are large ; their articular surfaces 

 are hollow and elongated transversely ; their inner borders are 

 confluent. 



The posterior pair are much distorted ; but they appear to 

 form wide transverse articular surfaces, the faces of which look 

 downwards. 



The transverse processes are perfect in neither vertebra, though 

 in one of them the extremities only are lost ; they are broad and 

 much compressed from front to back, and originate apparently 

 in the sides of the neural arch and the upper surface of the cen- 

 trum. They project almost horizontally ; but so much of their 

 extremities is wanting that there is no distinct evidence that they 

 are divisible into an upper and a lower portion, corresponding 



