422 Reports and Froceed'mgs — 



Zeuglodon obtained by tlielateDr. A. Wanklynfrom tlie Barton Cliff, 

 consisting of a great part of the skull, about the same size as that 

 of Zeuglodon hrachyspondylus, Miiller. The bones preserved are the 

 maxillary, frontal, and parietal bones. The left maxillary shows 

 the remains of five teeth in a length of rather less than seven inches, 

 the first two of which had simple conical crowns and a single fang; 

 the sockets of these are elliptical. The third tooth is considerably 

 compressed, with a sharjo margin, which has four small denticles on 

 each side of the large median denticle. The following teeth exhibit 

 somewhat similar characters, and each possesses two fangs. A 

 single tooth, resembling the canine of a Carnivore, was found with 

 the specimen, and was probably one of those missing from the first 

 sockets. The characters of the bones of the head were described in 

 more or less detail ; the frontal region is flattened, with a sharp crest 

 continued along the parietal region, as in Z. braehyspondyhis ; but the 

 crest is not flattened posteriorly into a narrow table, as in that 

 species, nor is the parietal united with the frontal by a folded suture. 

 The species, named Z. Wanklyni in memory of its discoverer, differs 

 from all known species of the genus in the shortness of the inter- 

 spaces between the teeth. 



8. " On the Eemains of Emys Hordwellensis, from the Lower 

 Hordwell Beds in the Hordwell Cliff, contained in the Woodwardian 

 Museum of the University of Cambridge." By Harry Govier Seeley, 

 Esq., F.L.S., F.G.S., etc. 



The remains described by the author consist of some fragments 

 constituting the greater part of the plastron and carapace of a species 

 of Emys obtained from a bed in Hordwell Cliff' about 20 feet 

 below that which yields the chief remains of Crocodilus Hastingsice, 

 and about 10 feet above the brackish-water Upper Bagshot beds. 

 The preserved portion of the carapace is 9 inches long ; when perfect 

 it was probably about 12 inches long and 10 inches broad. Its 

 distinctive characters were said to be the broad, short gular scute, 

 with sinuous sutures ; the subtriangular nuchal scute ; the subpen- 

 tagonal first vertebral scute, broader than the succeeding quadrate 

 vertebral scutes ; and the concentric ornamentation left on the 

 carapace and plastron by all the scutes. The author proposed for 

 the s]3ecies the name of Emys Hordwellensis. 



9. " On an associated series of Cervical and Dorsal Vertebrae of 

 Folyptycliodon from the Cambridge Upper Greensand, in the Wood- 

 wardian Museum of the Universit}^ of Cambridge." By Harry 

 Govier Seeley, Esq., F.L.S., F.G.S., etc. 



The author remarked upon the rarity of vertebrae of PolyptycJiodon 

 in the Cambridge Greensand in comparison with the abundance of 

 teeth, and stated that those collected do not appear to be the remains 

 of more than two individuals, probably representing two species. 

 One series from Haslingfield was described and figured by Prof. 

 Owen in 1860; the other, somewhat smaller series, described in the 

 present paper, is from the Huntingdon Eoad. The author described 

 in detail the structure of the atlas and axis and of the five succeeding 

 (cervical) vertebrae ; nine dorsal vertebras were also described. 



