H. GOVIER SEELEY ON KMYS HORDWELLENSI8. 445 



48. On Remains of Emys hordwellensis (Seeley) from the Lower 

 Hordwell Beds in the Hordwell Cliff, contained in the 

 Woodwardian Museum of the University of Cambridge. By 

 Harry Govier Seeley, Esq., E.L.S., F.G.S., &c, Professor of 

 Geography in King's College, London. (Read June 21, 1876.) 



By the intervention of Mr. Henry Keeping the Woodwardian 

 Museum acquired in 1868 some fine Chelonian fragments mine- 

 ralized nearly black (now arranged on shelf d of case 109) — which 

 after a little effort I found to reunite themselves into a plastron 

 from which the xiphoid bones are lost, and a large connected part 

 of the carapace which comprises the nuchal plate and the two 

 adjacent marginal plates, the first six neural plates, and portions 

 more or less perfect of the first five pairs of costal plates. The 

 marginal plates are all or nearly all lost, having probably been 

 washed away by the sea while the specimen was lying on the shore. 

 Two disconnected marginal bones were collected with the other 

 remains. 



Mr. Keeping tells me that the horizon of the fossil is about 20 

 feet below the bed which yields the chief remains of Crocodilus 

 Hastingice, and about 10 feet above the brackish-water Upper 

 Bagshot beds, which are seen in the cliff rising westward at an angle 

 of 3° at Mead End ; so that the position of the specimen is low 

 down in the Lower Hordwell series. 



The fragment of carapace as preserved is 9 inches long and 6 

 inches broad ; so that when perfect it probably measured about 12 

 inches in length and nearly 10 inches in breadth. In length it is 

 gently inflated, so that in the portion preserved (nine inches) the 

 highest part of the curve rises more than an inch above a base-line 

 drawn from the ends of the specimen. As is usual, the transverse 

 section is more inflated ; and in the width of 6 inches the highest 

 part of the curve rises 1| inch above a base-line drawn from the 

 two sides. The carapace is impressed with a small subtriangular 

 nuchal scute, the first and part of the second marginal scute on 

 each side, the first, second, third, and part of the fourth vertebral 

 scutes, and parts of the first, second, and third pairs of costal scutes. 

 I will first give the characters of the scutes, and then describe the 

 forms of the skeletal osseous plates. 



The Scutes of the Carapace. 



The nuchal scute (fig. 1, mi) is small, has its margins sinuous, is 

 | inch in length, measures | inch in breadth behind, and is | inch 

 wide on the anterior margin of the carapace. The first vertebral 

 scute (v 1) is six-sided and subpentagonal, three of the sides being 

 in front of the scute, there being a median side behind the nuchal 

 scute, and two lateral margins in which it joins the first marginal 



