6 Transactions of the Society. 



II. — Report on the Recent Foraminifera of the Malay Archipelago 

 collected by Mr. A. Durrand, F.RM.S.—Part VII. 



By Fortescue William Millett, F.E.M.S. 



(Bead 21st December, 1899.) 

 Plate I. 



Bigenerina digitata d'Orbigny var., plate I. fig. 1. 



Bigenerina (Gemmulina) digitata d'Orb., 1826, Ann. Sci. Nat., 

 vol. vii. p. 262, No. 4 ; Modele No. 58. B. digitata (d'Orb.)*Brady, 

 1864, Trans. Linn. Soc. London, vol. xxiv. p. 468, pi. xlviii. fig. 8. 

 B. arcuata Haeusler, 1890, Abhandl. schweizer. Pal. (-resell., vol. xvii. 

 p. 73, pi. xii. figs. 5-7. B. digitata (d'Orb.) Goes, 1894, K. Svenska 

 Yet.-Akad. Handl., vol. xxv. p. 38, pi. vii. figs. 324-341. 



This species has hitherto been recorded only from Europe. The 

 Malay variety is confined to Station 9, and the examples, although 

 minute, are moderately abundant. The test is finely arenaceous and 

 of the usual reddish-brown colour. The aperture is a large circular 

 orifice occupying nearly the whole of the distal face. This appears 

 to be the only feature in which it differs from the type. 



Bigenerina Jimbriata sp. n., plate I. figs. 2-4. 



Test hyaline, elongate, straight, compressed. Chambers of the 

 biserial portion numerous, having the outer margin projecting and 

 the surface granular. Chambers of the linear series broad at the 

 base, tapering towards the aperture ; the base encircled by a fringed 

 band. Aperture elliptical, with a bordered margin. Length 1 ■ 20 mm. 



This form may be described as a dimorphous Bolivina, the biserial 



EXPLANATION OF PLATE. 



Fig. 1. — Bigenerina digitata d'Orbigny var. x 135. 

 „ 2. „ jimbriata sp. n. x 40. 



„ 3. „ „ One of the chambers of the linear series. X 80. 



„ 4. „ „ Biserial portion, equal to Bolivina lobata Brady, chang- 



ing to the dimorphous condition, x 75. 

 „ 5. „ (Siphogenerina) iSchlumbergerii sp. n. x 75. 



n Q. , n „ By transmitted light showing the 



internal siphon, x 95. 

 „ l.—Spiroplecta annectens Parker and Jones sp. X 100. 

 „ 8. „ biformis Parker and Jones sp. x 135. 



,, 9. — Gaudryina siphonella Reuss. X 75. 

 „ 10. „ hirta sp. n. x 90. 



„ 11. „ Wrightiana sp. n. x 90. 



„ 12. „ „ Specimen with limbate sutures, x 100. 



,, 13. — Verneuilina pygm^a Reuss. X 135. 

 „ 14. — Ciirysalidina diptorpha Brady, x 60. 

 „ 15. — Tritaxia lepida Brady, x 135. 



