TERTEBRATA. 289 



rather than by a synovial joint : no hypapophysos to first or second 

 caudal. " The caudal vertebra) differ less from each other in Omosaurus 

 and Cetiosaurus than they do in either of these genera as compared 

 with IgiMYiodon." An osseous spine 1 ft. 8 in. long, with a central canal, 

 is the only dermal element found. The humerus, radius, metacarpals, 

 ilium, ischium, pubis, femur, tibia, &c. are described. A critical essay 

 on the affinities of Deinosauria ends this contribution. E. B. T. 



Owen, Prof. R. On Prorastonuis sirenoides (Ow.) — Part II. Quart. 

 Jouni. Geol. Soc. vol. xxxi. pp. 559-567 ; pis. xxviii., xxix. 



Further particulars of a skull of Tertiary age from Jamaica, described 

 in vol. xi. p. 541 (1855). The chief additions relate to the base of the 

 cranium, the zygomatic arch, the mandible, and the atlas. The brain- 

 case is elongate, and much contracted in front. As far as can be 



seen, the dental formula is : — i. |^, c. j-^[, d. or p. |^. m. ^ = 48. 



Prorastomus is minutely compared with other recent and fossil Sirenia. 



L. C. M. 



On Dinornis (Part 20) : containing a Restoration of the 



Skeleton of Cnemiornis calcitrans (Owen), with remarks on its 



affinities in the Lamellirostral group. Trans. Zool. Soc. vol. ix. 



pp. 253-272 ; pis. 35-39. 



Describes the skull, vertebrae, sternum, and limb-bones. Cnemiornis 



appears to have possessed closer affinities with the feebly -flying Goose of 



Australia (Cereopsis) than with the flightless Duck of Magellan's Straits 



(Tachyeres brachypterus, Latham). Confirms Dr. Hector's opinion of 



the former existence of a gigantic Anserine bird in N. Zealand. 



E. E., Jun. 



On the Fossil Mammals of Australia. — Part X. Family 



Macropodidae ; the Mandibular Dentition and Parts of the Skeleton 

 of Palorchestes, with additional evidences of Sthenurus^ Macropus 

 Titan, and Procoptodon. Proc. E. Soc. vol. xxiii. no. 162, p. 451. 

 (Abstract.) 



Peach, Charles W. On the Fossil Fish of Cornwall. Trans. R. Geol. 

 Soc. Cornwall, vol. ix. pt. 1, pp. 31-33. 



Written to show that the author's opinion about certain Cornish 

 fossils was correct. Some organisms, which he called fish, were pro- 

 nounced by M'Coy to be sponges of the genus Steyariodictyum. They 

 have since been examined by several palaeontologists, and found to be 

 Pteraspidian fishee. C. L. N. F. 



Pretrement, C A. Nouveaux documents sur quelques points de 

 I'histoire du cheval depuis les temps palc'ontologiques jusqu'a no8 

 jours. [New Facts in the History of the Horse.] Paris. 



Reinhardt, J. Bidrag til Kundskab om Kjaempedovoudvret Lestodon 

 1875. ' u 



