520 Transactions of the Society. 



Nodosaria scalaris Bcatsch sp. var., plate XI. fig. 10. 



Nautilus (Orthoceras) scalaris Batsch, 1791, Conch. Seesands, 

 No. 4, pi. ii. tig. 4 Nodosaria longicavda d'Orbigny, 182G, Ann. 

 Sci. Nat,, vol. vii. p. 254, No. 28. N. intersita Franzenau, 1888, 

 Foldt. Kozlony, vol. xviii. p. 172, pi. ii. figs. 1, 2. A. scalaris 

 (Batsch) Brady, Parker, and Jones, 1888, Trans. Zool. Soc., 

 vol. xii. p. 223, pi. xliv. figs. 6, 19. N scalaris (Batsch) Fornasini 

 1889, Minute forme Bizopod. Betic, pi. fig. 24. N. scalaris 

 (Batsch) Terrigi, 1891, Mem. B. Com. Geol. Italia, vol. iv. p. 82, 

 pi. 2, fig. 15 ; and N. raphanus (Linne) p. 82, pi. ii. fig. 16. N. 

 scalaris (Batsch) Egger, 1893, Abhandl. k. bayer. Akad. Wiss., 

 CI. II. vol. xviii. p. 344, pi. xi. figs. 40, 41. N. scalaris (Batsch) 

 A. Silvestri, 1893, Mem. Pontif. Accad. Nuovi Lincei, vol. ix. 

 p. 203, pi. v. fig. 4. N. scalaris (Batsch) Goes, 1894. K. Svenska 

 Vet.-Akad. Handl., vol. xxv. p. 73, pi. xiii. figs. 716-718. N 

 scalaris (Batsch) A. Silvestri, 1896, Mem. Pontif. Accad. Nuovi 

 Lincei, vol. xii. p. 156, pi. iv. figs. 5-11 ; pi. v. fig. 1. N. scalaris 

 (Batsch) Fornasini, 1902, Mem. E. Accad. Sci. 1st. Bologna, ser. 5 a , 

 vol. x. p. 34, figs. 27, 28. 



Bilocular examples of this species are common in the Malay 

 Archipelago, and on some of these the costse are very faint whilst 

 on others they are entirely wanting ; in this state the form is not 

 to be distinguished from N. simplex Silvestri, and this latter may 

 well be regarded as the smooth condition of N scalaris. 



As before mentioned, the embryonal chamber of these bilocular 

 forms of N. scalaris is always the smaller, as opposed to the 

 arrangement characteristic of N. proxima ; but this distinction 

 may after all be purely artificial, for taking these bilocular forms, 

 they are assigned to one or other of the species according as one or 

 other of the chambers is the larger, whilst both forms are to be 

 found embodied in the multilocular N. scalaris in which the second 

 chamber is usually larger than the embryonal, but is often smaller 

 as in N. proxima. 



It is one of the commonest of the Nodosaria in the Malay 

 Archipelago and is found at several Stations in both Areas. 



Nodosaria scalaris Batsch sp. var. scparans Brady, 

 plate XI. figs. 11, 12. 



Nodosaria scparans Batsch sp. var. scparans Brady, 1884, Chall. 

 Ptept., p. 511, pi. lxiv. figs. 16-19. N. scalaris var. scparans 

 (Brady) A. Silvestri, 1893, Mem. PoDtif. Accad. Nuovi Lincei, 

 vol. ix. p. 203, pi. iv. fig. 4. 



In N. scalaris as in N hispida there is a tendency to have some 

 of the chambers separated by a stoloniferous tube. 



This variety appears to be very local. It was found only in one 



