Geological Society. 543 



region is north-west and south-east, or north-north-west and south- 

 south-east. The country is traversed by several large dolerite- 

 dykes. 



II. The Northern Part of the East Coast. — Dolerite-flows pre- 

 dominate along the coast, and from their character are believed 

 to have flowed from such fissures as are indicated by the dolerite- 

 d}^kes noted in the preceding section. Some felsites, probably 

 lavas, and felsitic breccias were also observed: also a granitite 

 penetrated by epidiorites, and associated with chiastolite-slates. 

 Many other rocks, schists and eruptives, were found. 



III. The Northern End. — Sedimentary rocks (sandstones and lime- 

 stones) are extensively developed in this section, as well as much 

 volcanic material. The sediments are of Jurassic and Cretaceous 

 ages. The volcano Ambohitra is situated on these sediments, and 

 has poured out olivine-basalts. Shells of recent species occur on the 

 mountain-chain at the northern end. 



IV. The North-iv ester n Coast and Islands. — Marine strata of 

 Jurassic, Cretaceous, and Eocene ages are found in this area, together 

 with various igneous rocks including trachyte, foyaite, nepheline- 

 phonolite, hauyne-nepheline-phonolite, andesite, and basalt. South- 

 west of Anorontsanga are four islands — three composed of volcanic 

 rocks, and the fourth, Antanifaly, of nummulitic limestone. 



3. ' On a Collection of Fossils from Madagascar obtained by the 

 Rev. E. Baron.' By R. Bullen Newton, Esq., F.G.S. 



The fossils forming the subject of this paper were collected in the 

 northern part of the island. The author gives an account of the 

 previous work on the fossils of Madagascar ; this is followed by a 

 description of the post-Tertiary, Tertiary, Cretaceous, and Jurassic 

 fossils. The post-Tertiary fossils are for the most part terrestrial 

 shells found on Ambohimarina hill, mainly of species still existing 

 on the island. A few marine forms have been found elsewhere. 



A description of species, many of them new, follows; and the 

 author furnishes a list of all recognized fossils from the island, 

 concluding with notes on certain limestones, including a Globigerina- 

 limestone and one containing Girvanella. 



December 5th. — Dr. Henry Woodward, F.R.S., President, 

 in the Chair. 



The following communications were read: — 



1. ' Supplementary Note on the Narborough district (Leicester- 

 shire)/ By T. G. Bonney, D.Sc, LL.D., F.R.S., F.G.S., Professor 

 of Geology and Mineralogy in University College, London. 



The author revisited this district, briefly described by himself 

 and Mr. Hill in 1878, at Easter 1893 and in September 1894. 

 The old excavations had been greatly enlarged, but little of import- 

 ance had been disclosed : no dykes and no new junctions with 

 sedimentary rocks. But the crystalline rocks have been recently 

 struck in a fresh locality between Narborough and Huncote, about 

 half a mile west of the pit near the former village. As in that case, 



