104 rORAMINIFERA OF THE CRAG. 



Spieolocttlina Sandbeegeei, Beuss, 1853. Neues Jahrb. fiir Min., p. 671, pi. ix, 



fig. 2 (rather concave in the middle). 



— PLANTJLATA, Parker and Jones, 1860. Ann. Mag. Nat. Hist., 



ser. 3, vol. v, p. 470. 



— EXCAVATA, Bradi/, 1865. Nat. Hist. Trans. Northumb. and 



Durham, vol. i, p. 93, pi. xii, fig. 1. 

 MiLiOLA (Spieoloculina) planulata, Parher and Jones, 1865. Phil. Trans., 



vol. civ, p. 408, pi. xvii, fig. 82. 

 Spieolocttlina plantjlata, Jones, Parker, and Brady, 1866. Monogr. Foram. 



Crag, p. 15, pi. iii, figs. 37, 38. 



— coMPEESSiuscnLA, Karrer, 1867. Sitz. k. Akad. Wiss. Wien, 



vol. iv, p. 258, pi. ii, fig. 4. 



— DEPEESSA, Terquem (after d'Orhigny), 1878. Mem. Soc. Ge'ol. 



France, ser. 3, vol. i, p. 54, pi. x, fig. 11. 

 This seems to agree with Soldani's figure 

 chosen by d'Orbigny for his " depressa " 

 (see Ann. Mag. Nat. Hist., ser. 3, vol. xvi, 

 p. 33, 1865), but that was already the planu- 

 lata of Lamarck. 



— DiLATATA, Terquem, 1881. Plage Dunkerque, fasc. 3, p. 133, 



pi. xvii, fig. 13, 



— PLANULATA, Brady, 1884. ' Challenger ' Eept., p. 148, pi. ix, fig. 11. 



— DEPEESSA, Fornasini, 1886. Boll. Soc. Greol. Ital., vol. v, p. 221, 



No. 295. 



— PAPTEACEA, Burrows, Sherborn, and Bailey, 1890. Journ. Roy. 



Microsc. Soc, vol. for 1890, p. 551, pi. viii, 

 fig. 1 (thin variety). 



— ? DEPEEBSAji Schlumberger, 1893. M^m. Soc. Zool. France, vol. vi, 



p. 202, pi. iii, fig. 69, and 

 woodcut, fig. 2. 



— PLANULATA (?), de Amicis, 1893. Boll. Soc. Geol. Ital., vol. xii, 



fasc. 3, pp. 19, 178, 179. 



— cf. PLANULATA, Idem, 1893. Ibid., p. 309. 



Characters. — Lateral surfaces of the cliambers plane and parallel to the axis of 

 the shell ; shell sometimes slightly concave ; periphery usually flat and square ; 

 the surfaces of the chambers are sometimes slightly concave. Lamarck indicated 

 three forms of his Miliolites plamdata, namely : a, the typical planulata ; /3, less 

 flattened, var. turgidula ; and y, thin and keeled, planissima (see ' Ann. Mag. 

 Nat. Hist.,' ser. 3, vol. v, 1860, p. 470). The second of these perhaps may have 

 corresponded with the form named by Williamson Spiroloculina depressa, var. 

 rotundata (' Rec. Brit. For.,' 1858, p. 82^ fig. 178), and probably with 8p. nitida, 

 d'Orb. (' Ann. Mag. Nat. Hist.,' ser. 4, vol. viii, 1871, p. 248, pi. viii, fig. 24), and 

 8p. rotunda,^ d'Orb. (ibid., fig. 25), excepting as to the shape of outline. The name 



1 The section given at p. 202 is that of M. excavata. 



2 Not rotundata, as printed loc. cit. 



