516 Transactions of the Society. 



Hosius, 1892, Yerhandl. Nat. Ver. Preuss. Rheini Westphal., 

 Jahrg. xlix. p. 156, pi. ii. fig. -3. X. costdlata (Eeuss) Perner, 

 is: 17, Ceska Akad. Cisafe Frantiska Josefa (Pakeont, Bohemian 

 No. 4) p. 29, pi. iii. fig. 18. N. costulata (Eeuss) Flint, 1899, Rep. 

 U.S. Nat. Mus. for 1897 (1899) p. 312, pi. lviii. fig. 1. 



This variety of the X. pyvv.la group differs from the last de- 

 scribed only in having the base of the chambers marked by short 

 costae. The remarks on the diversity of shapes in the hispid variety 

 apply equally to the partially costate form, and in the Malay 

 Archipelago the distribution is similar. 



It is difficult to understand why Pieuss should have failed to 

 identify Von Schlicht's figure with d'Orbigny's N. semirugosa, and 

 why Brady, on the faith of Eeuss, should have accepted it as a 

 new variety. D'Orbigny states that X. semirugosa differs from 

 N. pgrula only in the partially costate condition of the base of the 

 chambers ; whilst Brady gives as the differences between the two 

 forms that "the walls are thick and the basal aspect of each 

 chamber is decorated externally with raised costse." 



Elsewhere it is by no means so common nor so widely distri- 

 buted as X. hispida. 'The 'Challenger' Stations are three in the 

 North Atlantic and one near the Philippine Islands, at depths 

 ranging from 95 to 450 fathoms. Flint records two ' Albatross ' 

 Stations, both in the Gulf of Mexico, 210 and 227 fathoms 

 respectively. 



Xodosaria (Dcntalina) soluta Eeuss. 



Dcntalina soluta Eeuss, 1851, Zeitschr. deutsch. geol. Gesell., 

 vol. iii. p. 63, pi. iii. fig. 4. Xodosaria soluta (Eeuss) Andreae, 

 1884, Abhandl. geol. Special Karte Elsass-Loth., vol. ii. p. 201, 

 pi. x. fig. 8. N. soluta (Eeuss) Sherborn and Chapman, 1886, 

 Journ. E. Micr. Soc, ser. 2, vol. vi. p. 746, pi. xiv. figs. 25, 26. 

 N. (D.) soluta (Eeuss) Burrows, Sherborn, and Bailey, 1890, Journ. 

 E. Micr. Soc, p. 557, pi. ix. fig. 26. Dentalina soluta (Eeuss) 

 Wisniowski, 1890, Pamietnik Wydz. iii. Ak. Umiej-Krakowie, 

 vol. xvii. p. 20, pi. viii. figs. 37, 38. N. soluta (Eeuss) Fornasini, 

 1890, Mem. R. Accad. Sci. 1st. Bologna, ser. 4, vol. x. p. 469, pi. 

 fig. 8. iV. soluta (Eeuss) Fornasini, 1891, Foraminiferi Pliocenici 

 del Ponticello di Savena, pi. ii. figs. 14, 15. X. soluta (Eeuss) 

 Terrigi, 1891, Mem. R. Com. Geol. Italia, vol. iv. p. 80, pi. ii. 

 fig. 10. X. (D.) soluta (Eeuss) Chapman, 1893, Journ. E. Micr. 

 Soc, p. 587, pi. viii. fig. 26. X. soluta (Eeuss) Goes, 1894, 

 K. Svenska Vet.-Akad. Handl., vol. xxv. p. 70, pi. xii. fig. 690. 

 N. soluta (Eeuss) Egger, 1895, Naturh. Ver. Passau, Jahresber., 

 xvi. p. 21, pi. ii. figs. 6, 15, 16. X. soluta (Eeuss) Perner, 1897, 

 Ceska Akad. Cisafe Frantiska Josefa ' (Palaeont. Bohemias No. 4). 

 p. 26, pi. iii. fig. 10. X. soluta (Eeuss) Egger, 1899, Abhandl. 



