LAGENA STRIATA. 185 



Lagenulina, Terquem, 1876. Aniin. Plage Dunkerque, fasc. 2, p. 6S, pi. vii, fig. 7. 

 Lagena steiata, Brady and Robertson, 1876. Rep. Brit. Assoc, for 1875, p. 189. 



— Geinzingensis, Karrer, 1S77. Geol. k. F.-.T. Wasserleitung, p. 378, 



pi. xvi, b, fig. 17. 



— steiata, Terrigi, 1880. Atti Ace. P.N. Lincei, vol. xxxiii, p. 177, pi. i, fig. 5. 



— — Mobius, 1880. Meere'sf. Mauritius, &c., p. 89, pi. viii, fig. 3. 



— Biitschli, 1880. In Bronn's Klassen, &c., p. 197, pi. vii, fig. 7. 



— — Green, 1881. Ainer. Journ. Mierosc., vol. vi, p. 46, pi. o, fig. 5. 



— — Jones, 1883. Microgr. Diet., ed. 4, p. 452, pi. xxiii, fig. 24. 



— — Brady, 1884. Report ' Challenger,' pp. 444 and 460, pi. lvii, 



figs. 22, 24, 28, 29. 



— — Haeusler, 1887. Neues Jahrb. for 1887, part 1, p. 184, pi. v, 



fig. 6. 



— — Brady, Parker, and Jones, 188S. Trans. Zool. Soc, vol. xii, 



part 7, p. 222, pi. xliv, fig. 28. 



— — Fornasini, 1893. Mem. Roy. Accad. Sci. Istit. Bologna, ser. 5, 



vol. iii, p. 431, pi. ii, fig. 2 (= Phialina 

 cylindracea, Seguenza). 



— — Egger, 1893. Abhandl. k. Bayer. Ak., vol. xviii, part 2, p. 327, 



pi. x, figs. 21—24, 31. 

 — Goes, 1894. K. Sven. Vet.-Akad. Hand!., vol. xxv,No. 9, p. 75, 



pi. xiii, figs. 732— 736. 1 



Characters. — Typically flask-shaped ; oval body with tubular neck ; marked 

 with delicate, parallel, longitudinal striae, like delicately engraved lines, but it is 

 often variable in shape of the body, length of neck, and nature of the striae. In 

 our figured specimen the striae have a spiral arrangement, but they retain a 

 straighter and more vertical position than those characterising Egger's L. tortilis 

 (' Abhandl. K. Bayer. Akad. Wiss.,' vol. xviii, part 2, 1893, p. 329, pi. x, figs. 61 

 —63). 



L. lineata, Williamson, appears to be the most delicately striate of the Lagense ; 

 and a relative coarseness of this ornament of incised lines increases among the 

 " striata " group, until the striae or thin lines may be said to broaden into furrows 

 or sulci. In this aspect the intervals of the striae may be said to become ridges. 

 These latter, however, may not in all cases be truly homologous with the intervals 

 between the striae ; for on these narrow spaces there often appear to be inde- 

 pendent exogenous growths of linear shell-matter, which takes the form of 

 interrupted ridges, granules, linear or diffused, and prickles, coarse or fine, and 

 more or less irregularly scattered. 



Occurrence. — Lagena striata has a very wide geographical range. It is more 

 common in the shallow waters of arctic and antarctic seas. In the temperate and 



1 In the former list of synonyms at p. 35 Oolina (Ovulina) sicula, Ehrenb., is Lagena sulcata ; 

 and Lagena vulgaris, var. gracilis, Williamson, is Lagena gracilis. 



