1893.] Geology and Paleontology. 473 
Chimeride. (Ann. Mag. Nat. Hist., Jan., 1892.) ——The fossil 
fragments of jaws and teeth described by Gervais under the name 
Lepidosteus suessoniensis have been referred by M. V. Lemoine to 
the genus Champsosaurus Cope. M. Dollo has recently published a 
critical comparison of Gervais’ Lepidosteus with Champsosaurus to 
show that there is no point of resemblance between them, but that they 
present numerous and radical differences, and that Gervais’ reference 
is correct. (Bull. Scien. de la France et de la Belgique, 1892.) 
Cenozoic.—Sejior Nogués, who has been exploring the Andesian 
volcanoes of Chillan, confirms the supposition of Pissis (Geografia 
fiscia de la Republica de Chili, 1875, Paris) concerning the existence 
of moraines of two distinct epochs, and therefore of glacial periods, one 
of them being anterior to the present volcanoes. This explains the 
orography of the region. (Geographical Journal, Feb. 1893.) Mr. 
G. Cotteau, who is studying the fossil echinoderms of the Eocene of 
France, has recently described a number of new species belonging to 
the genera Coptosoma (Desor), Liosoma (Cotteau), Micropeltis (Pomel) 
Circopeltis (Pomel), and Gagaria (Duncan). The latter genus is 
represented in France by six new species belonging to the middle 
Eocene. (Revue Scien., Jan., 1893.) Professor Cope recently 
exhibited to the Academy of Philadelphia a nearly entire mandible of 
the Tetrabelodon shepardii (Mastodon shepardii Leidy) from the 
Blanco (Pliocene) of Texas. He showed that it differs from the known 
species in the decurvation of the mandibular symphysis, which 
equals that of the corresponding part of the jaw of Dinotherium, but 
lacks the incurvature of that genus. He shows that the Mexican 
species formly referred to that species is distinct, and he proposed for 
it the name of Mastodon oligobunis. 
