490 Transactions of the Society. 



Mus. for 1897 (1899), p. 328, pi. Ixxii. fig. G. P. mcditerrancnsis 

 (d'Orb.) Silvestri, 1899, Mem. Pontif. Accad. Nuovi Lincei, vol. xv. 

 p. 286, pi. vi. figs. 4-7. 



Planoroulina acervalis Brady. 



Planorhulina acervalis Brady, 1884, Cball. Bepl., p. G57, pi. xcii. 

 fig. 4. P. acervalis (Brady) Brady, Parker, and Jones, 1888, Trans. 

 Zool. Soc, vol. xii. p. 227, p. xlvi. fig. 11. P. acervalis (Brady) 

 Flint, 1899, Rep. U.S. Nat. Mus. for 1897 (1899), p. 328, pi. Ixxii. 

 fig. 7. 



Planorhulina larvata Parker and Jones. 



Planorhulina vulgaris var. larvata Parker and Jones, 18G0, Ann. 

 and Mag. Nat. Hist., ser. 3, vol. v. p. 294. P. larvata Idem, 1865, 

 Phil. Trans., vol. civ. p. 380, pi. xix. fig. 3. P. larvata (P. and J.) 

 Egger, 1893, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 381, 

 pi. xiv. fig. 31. 



These three forms are not well represented in the Malay 

 Archipelago ; they occur at the same Stations, and are most 

 abundant in Area 1. 



Truncatidina d'Orbigny. 

 Truncatulina echinata Brady. 



Planorhulina echinata Brady, 1879, Quart. Journ. Micr. Sci., 

 n.s., vol. xix. p. 283. pi. viii. fig. 31. Truncatidina echinata Idem, 

 1884, Chall. Kept., p. 670, pi. xcvi. figs. 9-14. T. echinata (Brady) 

 Egger, 1893, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 403, 

 pi. xvi. figs. 40, 41. 



This is an aberrant form which seems as nearly allied to 

 Planoroulina as to Truncatidina, and may be treated as a con- 

 necting link between the two genera. 



It is not uncommon in Area 1, and occurs sparingly in Area 2. 

 The examples are normal, both in size and form. 



Brady states that it has its home amongst the coral-sands of 

 the Pacific and Indian oceans at depths of from 2 to 155 fathoms. 

 The ' Gazelle' Station is Mauritius, 225 fathoms. 



Truncatulina reticulata Czjzek sp. 



Rotalina reticulata Czjzek, 1848, Haidinger's Naturw. Abhandl., 

 vol. ii. p. 145, pi. xiii. figs. 7-9. Truncatidina reticulata (Czjzek) 

 Brady, 1884, Chall. Kept., p. 669, pi. xcvi. figs. 5-8. T. reticulata 

 (Czjzek) Brady, Parker, and Jones, 1888, Trans. Zool. Soc, vol. xii. 

 p. 228, pi. xlv.' figs. 23, 24. T. reticulata (Czjzek) Terrigi, 1891, 

 Mem. R. Com. Geol. d'ltalia, vol. iv. p. 107, pi. iv. fig. 10. T. reti- 

 culata (Czjzek) Chaster, 1892, First Kept, of the Southport Soc. of 



