66 PROCEEDINGS OF THE GEOLOGICAL SOCIETY, [Jan. 19, 



connected series of nine, and in another a series of three of these 

 vertebrae, all of an elongated shape. In the series of nine, the absence 

 of spinous processes shows that the under surface is exposed, — also 

 that they belong to either the dorsal or lumbar region. The transverse 

 processes are largely developed, are broad at their bases, and con- 

 tracted almost to a point at their free extremity (PL III. fig. 6). 

 Imperfect traces of what appear to be ribs are visible near the third, 

 sixth, and seventh vertebrae. In the series of three vertebrae, distinct 

 articulating processes can be traced, in part from the fragments of 

 bone, and in part from the casts in which they were lodged. In spe- 

 cimen No. 1, from which No. 12 was detached, may be seen casts of 

 the under surface of the nme vertebrae, also some fragments of the 

 series of three : traces of a spinal canal may be seen, if they are care- 

 fully examined in the direction of their length. 



These elongated vertebrae, with hourglass-shaped bodies, well de- 

 veloped triangular transverse processes, and distinct articulating pro- 

 cesses, all these characters being taken together, bear closer resem- 

 blance to the conditions of Salamanders and Ichthyoid Reptiles than 

 to Fishes. The biconcave vertebrae, though they are to be met with 

 in some Salamanders, yet are more confined among reptiles to the 

 ichthyoid species. 



No vertebrae, ribs, or spinous processes which could be referable 

 to the larger animal before described have been found. 



Notes on the above-described Fossil Remains. By Prof. Owen, 



F.R.S., G.S. &c. 

 Having, in compliance with the request of Dr. Wyman, examined 

 and compared the subjects of his Memoirs, the results of such com- 

 parisons, agreeably with his desire, are here subjoined. 



PI. II. fig. 6. The bone, specimen No. 1, most resembles the 

 proximal or upper element of the iliac bone of the Menopoma : it may 

 have an equal or perhaps closer resemblance to that of the Meno- 

 branchus, but the skeleton of this perennibranchiate batrachian does 

 not exist in the Museum of the College of Surgeons, or in the British 

 Museum. 



PI. II. fig. 7. The bone. No. 2, so far as the fractured surface 

 permits the comparison to be made, accords best with the humerus 

 of the Menobranchus. It shows the same sub-bicondyloid distal end, 

 and the characteristic deltoid and pectoral plates or crests near the 

 proximal end. It has nearly the same proportion to No. 1 which 

 the humerus bears to the upper element of the ilium in the Meno- 

 poma. Near the distal end of No. 2 is the articular end of a smaller 

 bone, fig. 7 a, corresponding in size and shape with the head of the 

 radius in the Menopome. 



PI. II. fig. .5. The flat bone* (No. 4), with a shght convexity on 

 the sculptured surface, and a slighter concavity on the opposite 

 smooth surface, resembles in the character of the sculptured surface 

 some of the broad and flat cranial bones oi Labyiinthodon. The deep 

 radiating grooves,' at the peripheral part of the bone, give the appear- 

 * See Note 6 of Prof. Wyman's Observations, p. 65. 



