254 Transactions of the Society. 



In the Pacific Ocean the genus Cristellaria is very sparingly 

 distributed, and there are few records of its occurrence in the 

 equatorial region or in the North Pacific. 



In Mr. Durrand's collection, although the genus is represented 

 by several species, the individuals are few and ill-developed. 



C. Scldoenbaclii possessing characters common to both Vaginu- 

 lina and Cristellaria comes naturally as a connecting link between 

 the two genera. 



It occurs sparingly at Stations in both Areas, and is not un- 

 common at Station 30. 



' Challenger ' Stations are off Bermuda, 435 fathoms ; off Culebra 

 Island, 390 fathoms; and off Kaine Island, 155 fathoms. Flint 

 records it from two Stations in the Gulf of Mexico, at depths of 

 1G9 and 210 fathoms. 



Cristellaria crepidula Fichtel and Moll sp. 



Nautilus crepidula Fichtel and Moll, 1803, Test. Micr., p. 107, 

 pi. xix. figs. g-i. Cristellaria crepidula d'Orbigny, 1839, Foram. 

 Cuba, p. 64, pi. viii. figs. 17, 18. C. crepidula (F. and M.) Jones, 

 1884, Quart. Journ. Geol. Soc, vol. xl. p. 770, pi. xxxiv. fig. 8. 

 C. crepidula (F. and M.) Balkwill and Millett, 1884, Journ. Micr., 

 vol. iii. p. 84, pi. iv. fig. 8. C. crepidula (F. and M.) Sherborn 

 and Chapman, 1886, Journ. E. Micr. Soc, ser. ii. vol. vi. p. 753, 

 pi. xv. fig. 21. C. crepidula (F. and M.) Halkyard, 1889, Trans, 

 and Ann. Eept. IVIanchester Micr. Soc, p. 67, pi. ii. fig. 5. C. 

 dilatala Wisniowsky, 1890, Pamietnik Wydz. iii. Akad. Umiej- 

 Krakowie, vol. xvii. p. 31, pi. ix. fig. 10 ; and C. dorsoarcuata p. 31, 

 pi. ix. fig. 11. C. crepidida (F. and M.) Haeusler, 1890, Abhandl. 

 schweiz. pal. Gesell., vol. xvii. p. Ill, pi. xiv. fig. 59; pi. xv. figs. 

 1, 18. C. crepidida (F. and M.) Fornasini, 1890, Mem. E. Accad. 

 Sci. 1st. Bologna, ser. 4, vol. x. p. 471, pi. figs. 31-33, 56-60. C. 

 crepidula (F. and M.) Egger, 1893, Abhandl. k. bayer. Akad. Wiss., 

 CI. II. vol. xviii. p. 350, pi. xi. figs. 51, 52 ; pi. xii. figs. 34, 35. 

 C. crepidula (F. and M.) Fornasini, 1894, Mem. E. Accad. Sci. 1st. 

 Bologna, ser. 5, vol. iv. p. 220, pi. iii. fig. 10. C. crepidula (F. and 

 M.) Goes, 1894, K. Svenska Vet.-Akad. Handl., vol. xxv. p. 62, 

 pi. xi. figs. 599, 600. C. crepidula var. intermedia Burrows and 

 Holland, 1897, Proc. Geol. Assoc, vol. xv. p. 40, pi. i. fig. 11 ; var. 

 cymhoides, pi. i. figs. 1-3 ; var. subarcuatula, pi. i. fig. 17 ; var. harpa, 

 pi. i. figs. 12, 18-21. C. crepidula (F. and M.) Flint, 1899, Eep. 

 U.S. Nat. Mus. for 1897 (1899), p. 316, pi. lxiii. fig. 2. C. crepidida 

 (F. and M.) Egger, 1899, Abhandl. k. bayer, Akad. Wiss., CI. II. 

 vol. xxi. p. 110, pi. xxiii. figs. 21, 22 ; pi. xxv. figs. 27, 28. 



Very few specimens of this form have been observed, and these 

 are of the subarcuatula type. 

 It occurs in both Areas. 



