204 R. Bullen Newton — Foraminifera, etc., 



Glasgow in the hope that Professor Gregory and liis staff might issue 

 a statement as to their structural and geological value. In accordance 

 with this request, therefore, the corals were first examined and 

 described in a joint paper by Professor Gregory and Miss J. B. Trench,^ 

 while some remarks on the Foraminifera and associated structures 

 have been postponed for the present occasion. At the time when the 

 corals were in course of description, the writer was appealed to for 

 an opinion as to the geological age of one of the pebbles (No. 1), 

 exhibiting corals and some smaller organisms, although to give aid 

 in this direction it was necessary to prepare microscopical sections of 

 the limestone for examination by transmitted light. It was then 

 ascertained that the genus Alveolina was of frequent occurrence, as 

 well as other Porarainifera, chiefly of the Milioline group. According 

 to Orbign)-,- Alveolina originated in Cretaceous times, having been 

 recorded from the Cenomanian rocks of France ; it is, however, much 

 more typical of the Eocene period, being well known in deposits of 

 that age as developed in England (Bracklesham Beds particularly), 

 Europe, Egypt, Madagascar, India, Java, Celebes, New Guinea, etc. 

 The genus is less abundant in the j-ounger Tertiary formations, while 

 according to II. B. Brady ^ two species alone survive in tropical seas 

 at the present day. The distribution of this genus, therefore, and 

 its association in the limestone pebble with the Miliolines, so 

 characteristic of the Bracklesham Beds and corresponding deposits 

 of the Paris Basin, suggested that the pebble might be attributed to 

 the Lutetian or Middle division of the Eocene series, a result since 

 accepted and published in the Gregory and Trench paper previously 

 referred to (p. 532). 



BlBLIOGlUPHY. 



Several memoirs have been issued on the organic structures of 

 New Guinea Tertiary rocks, most of which have been recently 

 reviewed in a paper by the writer,* and although it is unnecessary to 

 repeat such information it seems desirable to refer again to that part 

 of the literature which more particularly concerns the occurrence of 

 Alveolina in that country. The first mention of Alveolina in the 

 limestones of New Guinea was made by Dr. K. Martin* in 1881, from 

 material obtained in north-west regions, the generic determination 

 having been confirmed by Sch wager, who, moreover, considered that 

 the specimens were related to A. spJierica (Fortis), the equivalent of 

 A. melo (Fichtel & Moll), a characteristic Miocene species, besides 

 being known from older Tertiaries as well as from recent seas. The 



^ " Eocene Corals from the Fly River, Central New Guinea " : Geol. Mag., 

 1916, pp. 481-8, 529-36, Pis. XIX-XXII. 



'^ Prodrome Pal. Strat., 1850, vol. ii, p. 185. 



' Bep. Voy. H.M.S. " Challenger'" : Zoology — Foraminifera, vol. ix, pi. xvii, 

 figs. 7-15, pp. 221-4, 1884. 



* R. B. Newton, " Notes on some Organic Limestones, etc., collected by the 

 Wollaston Expedition in Dutch New Guinea, from Reports on the Collections 

 made by the British Ornithologists' Union Expedition and the Wollaston 

 Expedition in Dutch New Guinea (1910-13) " : Report No. 20, vol. ii, 1916. 



* " Eine Tertiaerformation von Neu-Guinea und benachbarten Insel " : 

 Samml. Geol. Reichs.-Mus. Leiden, vol. i, pi. iii, figs. 9-10, p. 70, 1881. 



