496 Transactions of the Society. 



This is another member of the group possessing the two dif- 

 ferent characters of shell-substance ; and, as in L. Isevigata, the clear 

 shell-substance surrounding the aperture extends in a thin band 

 round what may be called the margin of the test. 



In the Malay Archipelago examples there is very little branching 

 or other irregularity of the costse, and they usually cover the entire 

 surface of the test from the base to the prominence in which is 

 situated the aperture. 



The form is extremely abundant at several stations in Area 2, 

 but is very rare in Area 1. 



The only ' Challenger ' station reported is No. 346, South 

 Atlantic, a little south of the Equator, 2350 fathoms, but I have 

 found it in the material from Station 185, Eaine Island, Torres 

 Strait, 155 fathoms. 



Lagena quadrata Williamson sp., plate YIII. fig. 18. 



Entosolenia marginata var. quadrat a Williamson, 1858, Rec. 

 Foram. Gt. Britain, p. 11, pi. i. fig. 27. Lagena lucida var. 

 quadrata (Will.) Reuss, 1862, Sitzber. K. Akad. Wiss. Wien, vol. 

 xlvi. p. 324, pi. ii. fig. 26. L. quadrata (Will.) Balkwill and 

 Millett, 1884, Journ. Micr., vol. iii. p. 81, pi. ii. fig. 8. L. laevigata 

 var. quadrata (Will.) Wright, 1886, Proc. Belfast Nat. Field Club, 

 1884-5, App. ix. p. 324, pi. xxvi. fig. 9. L. quadrata (Will.) 

 Egger, 1893, Abhandl. K. bayer. Akad. Wiss., CI. II. vol. xviii. 

 p. 331, pi. x. figs. 78, 79 ; and L. compressa, p. 331, pi. x. figs. 1, 2. 

 L. quadrata (Will.) var. Jones, 1895, Palseont. Soc, p. 19ti, pi. vii. 

 fig. 9. 



Here, as elsewhere, this species occurs in two forms ; one of them 

 with the margin rounded, and allied to L. Isevigata ; the other with 

 a carinate margin, and differing but little from L. marginata. 



It occurs at several Stations in the Malay Archipelago, but only 

 in small numbers. 



Group of Lagena marginata. 



Lagena marginata Walker and Boys. 



"Serpula (Lagena) marginata" Walker and Boys, 1784, Test. 

 Min., p. 2, pi. i. fig. 7. Lagena marginata (W. and B.) Brown, 1827, 

 Illustr. Conch. Gt. Brit., fly-leaf, pi. i. figs. 30, 31. L. marginata 

 (W. and J.) Balkwill and Millett, 1884, Journ. Micr., vol. iii. p. 81, 

 pi. iii. fig. 2. L. marginata (Montagu) Haeusler, 1887, Neues Jahrb. 

 fiir Min., vol. i. p. 186, pi. iv. fig. 53. L. marginata (W. and B.) 

 Brady, Parker, and Jones, 1888, Trans. Zool. Soc, vol. xii. p. 222, 

 pi. xliv. figs. 27, 29, 30, 32. Fissurina alata (Pieuss) Franzenau, 

 1889, Math, termesz. ertesito, vol. vii. p. 249, pi. iii. fig. 4. L. 

 marginata (Montagu) Haeusler, 1890, Abhandl. schweizer. Pal. 

 "Gesell., vol. xvii. p. 86, pi. xiii. fig. 112. L. marginata (W. and B.), 



