323 DISCOVERY REPORTS 



Genus Planispirina, Seguenza, 1880 



42. Planispirina cryptella (d'Orbigny). 



Triloculina cryptella, d'Orbigny, 1839, FAM, p. 70, pi. ix, figs. 4, 5. 



Two stations : WS 80, 225. 



A single specimen at each station. The Type tube labelled " T. cryptella, lies Malouines" 

 in Paris contains eight specimens, all badly overgrown with efflorescence, some utterly 

 destroyed. One or two were successfully cleaned, and the specimens agree fairly well 

 with d'Orbigny 's fig. 5. There is nothing which can be suggested as responsible for 

 fig. 4 which, indeed, cannot be identified with either fig. 5 or the text. The species 

 appears to be very closely related to his Biloculina irregularis but is more globular. 



As already pointed out by Brady (B. 1884, FC, p. 171) the Miliola {Triloculina) cryptella 

 of Parker and Jones (P. & J. 1865, NAAF, p. 410, pi. xv, fig. 39) is not d'Orbigny's form. 

 This is the only occasion, as far as we are aware, on which d'Orbigny's specific name has 

 been revived. 



43. Planispirina irregularis (d'Orbigny). 



Biloculina irregularis, d'Orbigny, 1839, FAM, p. 67, pi. viii, figs. 20, 21. 

 Biloculina irregularis, Brady, 1884, FC, p. 140, pi. i, figs. 17, 18. 

 Biloculina irregularis. Chapman, 1914, EDRS, p. 42, pi. v, fig. 2. 



Four stations: WS 76, 225, 245, 248. 



Rare. The largest at WS 245, the most typical at WS 76. The Type is not to be found 

 in Paris. 



44. Planispirina sphaera (d'Orbigny) (Plate VI, figs. 41, 42). 



Biloculina sphaera, d'Orbigny, 1839, FAM, p. 66, pi. viii, figs. 13-16. 



Biloculina sphaera, Brady, 1884, FC, p. 141 (fig.), pi. ii, fig. 4 «, b. 



Planispirina sphaera, Schlumberger, i89i,BGF,p.577 (in the reprints, p. 190), text-figs. 45, 46. 



Biloculina sphaera. Chapman, 1906, GBI, p. 82, pi. iii, fig. i a, b. 



One station: WS 217. 



D'Orbigny records this species as not uncommon at the Falkland Islands, but we have 

 found it in but a single dredging, where it is scantily represented, the specimens agreeing 

 absolutely with d'Orbigny's figures, of small size (average 0-50 mm. in diameter), 

 compared with the dimensions which the species attains in deep water round the 

 British Isles, and in Discovery material from higher latitudes than the Falkland Islands. 

 Two Types in the d'Orbigny collection, one very small. They are in good condition 

 and of typical appearance. D'Orbigny's figure, incidentally, is poor. 



45. Planispirina bucculenta (Brady). 



Miliolina bucculenta, Brady, 1884, FC, p. 170, pi. cxiv, fig. 3 a, b. 



Planispirina bucculenta, Schlumberger, 1892, FAM, p. 208 (in the reprints, p. 194), text- 

 figs. 2, 3, pi. viii, figs. 6,7. 

 Miliolina bucculenta, Goes, 1894, ASF, p. 118, pi. xxiii, figs. 890-903, pi. xxiv, figs. 904, 905. 



One station: WS 88. 



A single small specimen at this station; probably a young individual. 



