DEEMOCHELYIDJS. 



227 



chelys ; the bone lying between them and described by 

 Owen as the entoplastral is more probably an anterior rib. 

 The dorsal scutes are transversely elongate, and measure 

 about 0,110 (4 inches) in length by 0,220 (8 inches) in 

 breadth ; they were described by Owen as neural bones, 

 but there are three of them overlying two ribs, besides 

 which those at one extremity of the slab have no under- 

 lying rib or vertebra, while at the other extremity a 

 distinct separation can be seen between them and the 

 ribs. Seven of these scutes are preserved. The large 

 imperfect bone underlying one of the coracoids is provi- 

 sionally regarded as an epiplastral. Purchased, 1873. 



41899. Fragment showing on one side four scutes of the dorsal 

 row of the carapace, of which the first and last are im- 

 perfect, and on the under surface one entire and one 

 imperfect dorsal vertebra, the heads of two ribs, nearly in 

 their original position, together with some undetermined 

 bones ; from Sheppey. Purchased, 1870. 



44089. Fragment showing the greater portion of two dorsal scutes, 



together with a transverse section of a vertebra ; from 

 Sheppey. Purchased, 1873. 



39220. Fragments of three nearly entire dorsal scutes of a smaller 

 individual ; from Sheppey. This specimen formed part of 

 a septarian nodule, and is consequently much traversed 

 by cracks. Bower-bank Collection. Purchased, 1885. 



44090. The imperfect distal extremity of the right humerus, 



associated with the preceding specimen. The general 

 contour is very similar to that of the left humerus of 

 P. scaldi, figured by Dollo, op. cit. pi. iv. fig. 1, but the 

 distal expansion is more marked. Purchased, 1873. 



R. 1501. The middle of the shaft of the right humerus of a very 

 large individual ; from Sheppey. No history. 



39446. The imperfect shaft of the right humerus of an equally 

 large individual ; from Sheppey. Bowerbanlc Collection. 



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