RECENT ADVANCES IN SCIENCE 207 



plete reports of this survey are in course of preparation. Mean- 

 while Prof. H. F. Osborn describes {Bull. Am. Mus. Nat. Hist., 

 vol. xli, 1 91 9), three new species of Titanotheres, and makes 

 some important additions to our knowledge of the Huerfano 

 beds, which are now shown to attain a thickness of 3,500 feet. 



Palaeontologists have, till now, failed to recognise the 

 marked differences between the peccaries and the true pigs. 

 Mr. James Gidley, in an important paper on Pleistocene pec- 

 caries from the Cumberland Cave deposit, Maryland, sets the 

 matter finally at rest {Proc. U.S. Nat. Mus., vol. Ivii). In a 

 series of carefully compiled tables he compares the several 

 fossil species which have already been described, and supple- 

 ments these with descriptions of four new species. A number 

 of excellent illustrations adds much to the value of his work. 



That the Great Auk {A lea impennis) ranged much farther 

 south than has hitherto been supposed has been demonstrated 

 by Dr. C. W. Andrews, who describes [Ann. & Mag. Nat. Hist., 

 vol. V, July 1920) the upper end of a humerus from a cave in 

 St. Brelade's Bay, Jersey : and further adds that the figure of 

 a bird, supposed to represent the Great Auk, has recently been 

 found in a recess of the Cavern of Gargas (Hautes Pyr^n^es). 



Dr. C. W. Andrews also describes {Ann. & Mag. Nat. 

 Hist., vol. V, Jan. 1920) two new species of fossil Tortoises which 

 are of considerable interest. The first of these was derived 

 some years ago from the upper Greensand of Melbury Down, 

 near Shaftesbury, Dorset ; and for years was used for block- 

 ing a gate open. As a consequence the carapace has been 

 much damaged, but the plastron is beautifully preserved. 

 This specimen, which belongs apparently to the Pleurodira, 

 has been named Trachydermochelys ruiteri, in honour of Mr. 

 Clarence Rutter, who has presented it to the British Museum. 

 It measures 18^ inches in length, and represents the third 

 specimen of this genus found in Great Britain. The second 

 specimen is represented by part of a carapace from the 

 Barton Clay at the foot of Highcliff, near Christchurch, Hants. 

 When complete it must have measured about 28 inches in 

 length. It apparently belongs to the family Emydae, and 

 represents a new genus and species — Patanemys bartonensis — ■ 

 and is now in the collection of the Museum of Practical 

 Geology, Jermyn Street, London. 



Many years ago, Dr. John Ryder, under the direction of 

 Prof. Cope, attempted a restoration of the Sauropod dinosaur 

 Camerosaurus. It was a far from convincing piece of work, 

 and contained one or two rather curious errors of judgment. 

 Prof. H. F. Osborn, assisted by Mr. C. C. Mook, has made a 

 fresh attempt to restore this skeleton and the appearance of 

 the living animal {Proc. Am. Phil. Soc, vol. Iviii, 191 9).. 



