DENTALINA OBLIQUA. 223 



NoDOSABiA OBLIQUA, Fomasini, 1892. Mem. E. Accad. Sci. Istit. Bologna, ser. 5, 



vol. ii, p. 564, pi. o, jBgs. 1 — 3 (forma A) ; 

 figs. 4, 5 (forma B) ; fig. 6, var. ? (forma 

 A) ; fig. 7, var. vertehralis, Batscli (forma 

 A). Ibid., vol. iii, 1893, p. 434, pi. ii, fig. 

 5 ; vol. iv, 1894, pp. 203, 204, 209, 213, 

 pi. i, figs. 46 — 49 ; pi. ii, figs. 7 — 9 

 {D. and N. mutahilis and N. siphuncu- 

 loides, Costa). 



— — De Amicis, 1893. Boll. Soc. Greol. Ital., vol. xii, fasc. 3, 



p. 387 (long synonymy). 



— — Dervieux, 1894. Ibid., vol. xii, fasc. 4, p. 626, pi. v, fig. 62. 



— VEETEBEALis (?), logger, 1893. Abhandl. k. Bayer. Akad. Wiss., 



vol. xviii, part 2, p. 344, pi. xi, 

 fig. 36. 



— OBLIQUA, Goes, 1894. K. Vet.-Akad. Hand]., vol. xxv, No. 9, p. 70, 



pi. xii, figs. 691—696. 



Characters. — This is an elongate, acuminate, and arcuate modification of 

 Nodosaria raphanus, and to avoid repetitive terminology the word Nodosaria is 

 here omitted before Dentalina, as intimated above at pages 206 and 220. 

 This is not the smooth D. obliqua of d'Orbigny; see 'Ann. Mag. Nat. Hist.,' 

 1871, p. 159. 



The slender, acuminate, and straight (microspheric) form of N. raphanus 

 {N. aciculata of Lamarck) is beautifully illustrated by Silvestri (' Atti Accad. 

 Gicenia Sci. Nat.,' ser. 3, vol. vii, 1872, p. 39, pi. iii, figs. 52 — 56) as Nodosaria 

 conica (thus named by him after Soldani, but not by the latter, for Soldani named 

 nothing according to the Linnsean method).^ 



Occurrence. — Dentalina obliqua has a wide geographical and bathymetrical range. 

 The tables appended to the ' Challenger' Report record the occurrence of specimens 

 at six stations, namely, off the north-west coast of Ireland, off the west coast of 

 Africa, off the Cape of Good Hope, between Prince Edward Island and Kerguelen, off 

 Sydney, and in the equatorial region of the South Pacific. The depth in these cases 

 ranged from 150 to 2425 fathoms. It occurs also in the Mediterranean and Adriatic. 

 Fossil specimens have been recorded from the Permian {D. Kingii), from the Lower 

 Lias (Brady), from the Chalk of Bohemia and of Swanscombe (Kent), from the 

 London Clay (Eocene), the Oligocene of Elsass, the Miocene of Italy, Messina 

 (Sicily), and Muddy Creek (Victoria), from the Pliocene of Italy, and of Garrucha, 

 South Spain. In addition to the record from Sutton given in the First Part of this 

 Monograph, we have specimens from Sutton, zone f, and from Aldborough, zone g. 



1 See * Ann. Mag. Nat. Hist.,' ser. 4, vol. viii, 1871, p. 153. 



