968 General Notes. { November, 
M. Dollo thinks not and finds occasion for the creation of a new 
name. Adocus, another Cryptodire genus, has a single one well 
developed. 
In his second article M. Dollo separates certain species re- 
ferred by. Professor Owen to the genus Chelonia, as representa- 
‘tives of another genus which he names Pachyrhynchus. It is 
characterized by the underroofing of the posterior nares, and by 
the great extent of the mandibular symphysis. He regards this 
character as requiring the creation of a sub-family of the 
Cheloniidz, the Pachyrhynchine. The present writer has, 
however, described the same characters in two genera 
referred by him to the Propleuridze (Euclastes and Lyto- 
loma) and has referred to one of the European species (Chelone 
planimentum Owen—Pachyrhynchine Dollo) as presenting this 
character... M. Dollo’s genus is probably one of the American 
forms, and his Pachyrhynchinz is the Propleuride Cope. i 
Dollo’s family characters are, however, better than those given 
by Cope.—£. D. Cope. 
GEOLOGICAL News.—General.—M. Steinman recently gave to 
the Swiss Society of Natural Sciences an account of his explora- 
tions in the Southern Cordillera. The fossil fauna and flora are 
evidences of glaciation in the Australian Alps. The author and 
Dr. Lendenfeld found erratics, perched blocks, smoothed surfaces 
_ and old moraines upon Mount Bogong, the highest mountain in 
_ Victoria. 
~ Silurian.—M. Hebert, who has for a considerable period been 
_ occupied with the study of the most ancient sedimentary rocks 
_.of the northwest of France, has come to the conclusion, that in 
Northern Brittany and Western Normandy the vertical slates 
phyllades) of Saint Lo are at the base, while upon them lie the 
ransactions American Philosophical Society, 1870, pp. 146-8. 
