H. GOVIER SEELEY ON EMYS HORDWELLENSIS. 447 



The third vertebral scute (v 3) has subparallel sides, but is longer 

 than broad, measuring fully 2 inches in breadth and 2h inches in 

 length. Its anterior and posterior outlines cross the third and 

 fifth, neural plates, behind the middle of the plate in both cases ; 

 and the lateral outlines cross the third, fourth, and fifth pairs of 

 costal plates at about half an inch from the neural plate adjacent to 

 each. 



The fourth vertebral scute (v 4) is imperfectly indicated by the 

 bones preserved, but was rather broader than the third. 



The first costal scute (c 1) in antero-posterior length measures 3 

 inches; it stretches from the first marginal plate to behind the 

 middle of the second costal plate. Its breadth is uncertain, as is 

 that of all the other costal scutes, for every costal plate is imperfect; 

 but it appears to have been subtriangular and as broad as long. 

 The second costal scute (c 2) measures 2| inches from front to 

 back. The third pair of costal scutes is imperfectly indicated. The 

 boundaries between these scutes are all sharply incised rather than 

 deeply impressed. 



The Osseous Elements of the Carapace, 



The nuchal plate is six-sided, concave along its front margin, 

 which is about l^inch wide. It is similarly concave behind, where 

 it receives the convex anterior margin of the first neural plate, and 

 is one inch wide. Of the two lateral sutural surfaces on each side, 

 those which join the marginal plates converge in front, and are each 

 lg inch long ; those which join the first costal plates converge 

 behind more rapidly, and are each about 1\ inch long. The length 

 of the plate in the median line is 1-J- inch ; its greatest width from 

 side to side is about 2-J inches. 



The first neural plate is subovate in outline, being convex in 

 front and behind and convex at the two sides. Its greatest width 

 is 1J inch, and its greatest length l T 5 g inch. It articulates with 

 the nuchal plate in front, with the first pair of costal plates at the 

 sides, and with the second neural plate behind. It is depressed in 

 its hinder third, as well as impressed by the transverse scutal 

 margin. 



The second neural plate, which is short and broad and gently 

 convex, has the usual shape. It is concave in front, and an inch 

 wide where it meets the first neural plate. Here there are lateral 

 shoulders a quarter of an inch long, which meet the first pair of 

 costal plates, and widen the bone to 1J inch. The posteriorly 

 converging lateral surfaces which meet the second pair of costal 

 plates, measure -J-| inch in length. The bone in the median line 

 is 1^ inch long, and is -£|- inch wide posteriorly, where it joins 

 the third neural plate. 



The third neural plate has the same general form as the second, 

 but is longer ; and it is depressed behind the middle, but not so 

 deeply as the first neural plate. It is 1| inch long in the median 



Q. J. G. S. No. 128. 2 1 



