Report on Foraminifera. By F. W. Millett. 627 



Palaeont, Soc, p. 205, pi. vii. fig. 12. L. castrensis (Schwag.) Flint, 

 1899, Rep. U.S. Nat. Mus. for 1897 (1899) p. 308, pi. liv. tig. 5. 



This variety occurs in great abundance at many Stations in both 

 Areas. 



There is considerable diversity in the surface ornamentation, as well 

 in the nature as in the arrangement of its components. 



As a matter of convenience, in the synonymy are included all the 

 described varieties of L. Orbignyana in which the surface markings 

 are circular, without regard to their being depressions or elevations, 

 or to any other character which they may happen to possess. 



Trifacial varieties of this form are very uncommon, and for 

 this reason an example having this character has been selected for 

 illustration. 



Lagena Orbignyana var. Walleriana Wright, plate XIY. fig. 19. 



Lagena Orbignyana var. Walleriana Wright, 1886, Proc. R. 

 Irish Acad., ser. 2, vol. iv. p. Gil ; and 1891, ser. 3, vol. i. p. 481, 

 pi. xx. fig. 8. 



This variety is very rare, and has been found only at Station 22, 

 in Area 2. 



Wright reports it from various Stations off the south-west of 

 Ireland, at depths ranging from 53 to 345 fathoms. 



It is not uncommon in the Tertiary beds of St. Erth ; and in the 

 fossil examples the central boss is often replaced by a ring of corre- 

 sponding size. 



Lagena Orbignyana var. pulchella Brady, plate XIY. fig. 21. 



Lagena pvlehella Brady, 1SG6, Rept. Brit. Assoc. (Nottingham) 

 p. 70. L. pulchella Brady, 1870, Ann. and Mag. Nat. Hist., ser. 4, 

 vol. vi. p. 294, pi. xii. fig. 1. L. pulchella (Brady) Ballcwill and 

 Millett, 1884, Journ. Micr., vol. iii. p. 81, pi. ii. fig. 13 ; and pi. iii. 

 fig. 11. L. pulchella (Brady) Balkwill and Wright, 1885, Trans. R. 

 Irish Acad., vol. xxviii. p. 342, pi. xii. fig. 19. 



In the Malay Archipelago this variety is rare, although it occurs 

 at Stations in both Areas. 



The irregular branching or reticulated costae proper to this form 

 are often mixed with the circular vesicles usually found in L. castrensis. 

 This is shown in the specimen selected for illustration. 



Lagena Orbignyana var. variabilis Wright, plate XIV. fig. 22. 



Lagena Orbignyana var. variabilis Wright, 1891, Proc. R. Irish 

 Acad., ser. 3, vol. i. p. 482, pi. xx. fig. 9. 



The Malay Archipelago examples are not so elongated as that 

 figured by Wright, and but for the riblets would not be distinguishable 



