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Show 1895.] FOEAMINIFEBA FEOM THE AEABIAN SEA. 45 270. NONIONINA POMPILIOIDES (Fichtel & Moll). Nonionina pompilioides, Brady, 1884, Chall. Eep. vol. ix. p. pi. cix. figs. 10, 11. Found in Sample No. 1, very rare; No. 5, very rare; No. 6, rare. POLYSTOMELLA, Lamarck. 271. POLYSTOMELLA CBISPA (Linne). Polystomella crispa, Brady, 1884, Chall. Rep. vol. ix. p. 736, pi. ex. figs. 6, 7. Found in Sample No. 1, rare ; No. 2, very rare. AMPHISTEGINA, d'Orbigny. 272. AMPHISTEGINA LESSONII, d'Orbigny. Amphistegina lessonii, Brady, 1884, Chall. Rep. vol. ix. p. 740, pi. cxi. figs. 1-7. Found in Sample No. 1, frequent; No. 2, common; No. 4, rare. 273. AMPHISTEGINA EADIATA (Fichtel & Moll). (Plate I. figs. 8, 9, 10, 12.) Nautilus radiatus, Fichtel & Moll, 1803, Test. Micr. p. 58, pi. viii. figs. a-d. The above species was described by Fichtel and Moll from specimens found in sea-sand from the interior of shells from the Red Sea. Profs. Parker and Jones remark 1 on this form as follows :- " This is a small, smooth, lenticular Nummulina, about 1 line in diameter: marked with twenty-four radiating, translucent, septal lines, slightly sinuous, with an open sigmoid flexure, which extends from the periphery to the umbonal centre, and as many intermediate, short, parallel septal lines towards the peripherical margin. These indicate altogether nearly fifty chambers in the outer whorl, the lateral lobes of which, in passing towards the umbonal centre, interfere with each other, leaving only indications of half as many elongate, triangular, sinuous, umbilical lobes." Having this opportunity of examining the very fine specimens referable to the above species, which were found in the above-mentioned (no. 2) coral-deposits of the Laccadives, I prepared slices of the tests, both median and transverse, in the hope of finding additional evidence regarding the affinities of the species. This was considered necessary, especially since the recent examples of Nummulina appear to have been hitherto somewhat neglected. In the first place, the specimens of Amphistegina radiata which occur in the Laccadive Island deposits are inequilateral in transverse 1 " The Nomenclature of the Foraminifera, Part III.," Ann. & Mag. Nat Hist. ser. 3, vol. v. [1860] pp. 105, 106. |