294 PALEONTOLOGY. 



Traquair, Dr. R. H. On the Structure and Systematic Position of 



the Genus CJieirolejns. Ann. Nat. Hist. ser. 4, vol. xv. pp. 237- 



249, pi. xvii. 



The close relationship of Cheirolejns and Palceoniscus is affirmed. 



The Acantliodidce agree with Cheirolejns in little save the minute size 



of the scales. Powrie's " principal jugulars " are interclavicular plates. 



The fins, shoulder-girdle, skull and dentition are described and figured. 



L. C. M. 



On the Structure of AmpMcentrum granulosum, Huxley. 



Ann. Nat. Hist. ser. 4, vol. xvi. pp. 273-281, pi. ix. 

 The study of a series of specimens has enabled the author to give a 

 description of the head and shoulder-girdle of the above genus, which 

 differs materially from that given by Dr. Young in his paper " On the 

 affinities of Platyso7nus and allied genera." A revised diagnosis of the 

 genus Amjjhicentrum is given. E, T. N. 



On the Structure and Affinities of Tristichojoterus alatus, 



Egerton. Trans. B. Soc. Edin. vol. xxvii. pt. 3, pp. 383-396, 



pi. 32. 

 Gives a description of the new facts disclosed by further specimens. 

 Considers that Tristicliopterus has no affinity with Bipterns, nor any 

 special relationship with Ccelacanthus, but that it should be placed in 

 the Cycliferous division of the Glyptodipterini, in Prof. Huxley's classi- 

 fication of the Crossopterygian Ganoids. Gives a provisional modification 

 of the arrangement of the latter. E. E., Jun. 



Ubachs, Casimir. La Chelonia Hoffmanni, Gray, du tuffeau de 

 Maestricht. [(7. Hoffmanni, Gray, from the Maestricht Chalk.] 

 Ann. Soc. Geol. Belg. t. ii., Memoires, pp. 197-205 ; plate. 

 Describes the most perfect specimen of this species which has been 

 found. The carapace is complete and in perfect preservation ; it mea- 

 sures 1-45 metre in length. G. A. L. 



Vacek, M. Ileber einen Unterkiefer von Mastodon longirostris, Kaup, 



aus dem Belvedere-Sande am Laaer-Berge bei Wien. [Lower Jaw 



of Mastodon longirostris from Belvedere Sands.] Verh. Jc.-Jc. geol. 



Reichs. pp. 296-298. 



Preliminary notice of mandible of M. longirostris ; the milk dentition 



fairly preserved. 



Vaillant, Prof. Leon. Eemarques sur les Le'zards de I'Ambre, et 



description d'un Geckotien de la Besine Copale. [Lizards in Amber, 



and a Gecko in Gum-Copal.] Ann. Sci. Geol. t. vi. livr. 3, pp. 15 ; 



plate. 



Shows that the presence of lizards in true amber is problematical. 



Describes the occurrence of a recent lizard, Hemidactylus capensis^ in 



gum-copal (mistaken for amber), which gum he considers semifossil, of 



the Quaternary period, being the product of an extinct tree. E. B. T. 



