1886. | Geology and Paleontology. 153 
AFRICA.— Capello and Ivens’ Fourney—Messrs. Capello and 
Ivens reached Lisbon on Sept. 17th, after traveling 4200 geo- 
graphical miles in Africa during fifteen months. From the Portu- 
guese territory they proceeded towards the Cubango, as far as the 
lower part of the Tucussu, where the barrenness of the region, 
intersected by water-courses and marshes, forced them to turn 
northwards through a district infested by the tsetse. Sixteen of 
the party died of tsetse-bites, besides cattle and dogs. Sixty-two 
men perished during the fifteen months. The principal results of 
this journey are the rectification of the course of the Cunene, the 
determination of the Quarrai and its union with the Cubango, as 
well as the interesting hydrography of the Handa and the Upper 
Ovampe ; the exploration of the Cubango between 15° and 17° 
S. lat., and of its principal eastern affluents ; the investigation of 
the basin of the Upper Zambezi to Libonta, and the upper and 
middle course of the Cabompo; the discovery of the Cambai, an 
eastern branch of the Upper Zambezi; the exploration of the 
sources of the Lualaba and Luapula, and of the northern tributa- 
ries of the Middle Zambezi; and the identification of the Loengue 
with the Kafuke. The great lake Bangweolo of modern maps is 
really composed of two smaller lakes, Bangweolo to the north, © 
and Bemba to the south, separated by a marshy belt. This agrees 
with M. Giraud’s account. 
GEOLOGY AND PALAIONTOLOGY. 
THE STERNUM OF THE DinosaurIA.— The discussion which 
has been going on between paleontologists, as to the nature of 
the sternum of the Dinosauria, and the presence or absence of 
clavicles in this order, induces me to present some evidence which 
bears distinctly on the question. The first point to be noticed is 
the pair of bones represented in Fig. 1, which belongs to the 
skeleton of Diclonius mirabilis Leidy! It is evident that these 
Diclonius, I cannot give their exact relations. The positions in 
which the bones were found by Dollo in the Iguanodon renders 
it highly probable that they are the separate pleurosteal elements 
of the sternum. The long processes will then be posterior, and 
will have given attachment to ribs. Such a type of sternum is, 
however, unique, and requires good evidence before admission 
into our descriptions. : 
Important evidence on this point is furnished by the probable 
corresponding element in the Laramie dinosaurian, the Mono- 
clonius crassus Cope’ This is a quadrupedal form, aboutaslarge = 
1 Proceedings Academy, Philadelphia, 1883, p. 97. : 
? Bulletin du Musée Royal d’Histoire Naturelle de Belgique, 1882, p. 208. a o 
* Proceedings Academy, Philadelphia, 1876, October; Pal. Bulletin, No. 22, p. 8 
