FOEAMINIFEEA OF THE KEEIMBA AECHIPELAGO. 555 



SpirolocuUna chrsata Reuss, 1870, FSP. p. 464; von Schlicht, 1870, FSP. p. 97, pi. sxxvii. 

 figs. 24-32. 

 „ depressa Terquem, 1875, etc., APD. 1875, p. 38, pi. v. fig. 18. 



„ limbatn Brady, 1881, FC. p. 150, pi. ix. figs. 15-17. 



dnrsata Jones, Parker, & Brady, 1866, etc., MFC. 1895, p. 110, text-figs. 4 & 8. 



7 Stations. 



This species, in which the sutural lines are strongly limbate, is poorly represented in 

 the dredgiugs, very few typical specimens being obtained, the best at Stn. 10. At 

 Stn. 11 individuals passing into S. limhata d'Orbigny were found. At Stn, 1 specimens 

 occur of an elongate type resembling Williamson's *S'. depressa, var. cymhium {ut 

 supra). 



The synonymy of this species is unfortunately very confusing. As already explained 

 (under S. limhata), d'Orbigny's species of that name is based on a somewhat 

 uncommon type figured by Soldani, which does not really deserve the characteristic 

 description conveyed by its specific name, but is an inflated type midway between 

 8. nitida and S. excavata. Bornemann {ut supra) figured a planulate form with 

 strongly limbate sutures under the same specific name as d'Orbigny. Bornemann's 

 type being of wide distribution, his specific name was used for many years in defiance 

 of the laws of priority, as may be seen in the above synonymy. Reuss {;ut supra) 

 figured a similar planulate form under the name dorsata, and, as Bornemann's name 

 lapses under the rules of priority, Reuss's name must take its place. 



20. SpirolocTilina planulata (Lamarck). 



Miliolites planulata Lamarck, 1804, AM. p. 352. no. 4; Lamarck, 1816, etc., ASV. vol. vii. 



p. 613. no. 4. 

 SpirolocuUna depressa d'Orbigny, 1826, TMC. p. 298. no. 1, Modele no. 92*. 

 „ badenensis d'Orbigny, 1846, FFV. p. 270, pi. xvi. figs. 13-15. 



planulata Brady, 1884, FC. p. 148, pi. ix. fig. 11. 



Goes, 1894, ASF. p. 107, pi. xviii. fig. 836. 

 „ Parker, Jones, & Brady, 1866, etc., MFC. 1895, p. 103, pi. iii. figs. 37, 



38, woodcut fig. 1. 



12 Stations. 



Generally distributed and often abundant, but good typical specimens of the flat 

 parallel- faced type resembling the S. depressa of d'Orbigny are not very abundant. 

 The tendency is to pass into excavate forms such as S. ancjulosa d'Orbigny (q. v. sub 

 S. excavata. No. 17). There is also a marked tendency at certain Stns. (especially 1, 

 4, 7, 9, and 12) to develop surface-markings varying from a few scattered and irregular 

 costse to a generally irregular costation comparable with Terquem's S. costigera 



* D'Orbigny has identified Modele no. 92 with his no. 2 (p. 298), ^. perforata. This appears to be a 

 misprint, the correct reference of the Modele being to no. 1, S. depressa, which = ^. jilanulata (see P. J. &- B. 

 1859, etc. NF. 1865, p. 33). 



