LAGENA STRIATA. 185 



Lagenulina, Terquem, 1876. Anim. Plage Dunkerque, fasc. 2, p. 68, pi. vii, fig. 7. 

 Lagena striata, Brady and Eohertson, 1876. Rep. Brit. Assoc, for 1873, p. 189. 



— Geinzingensis, Karrer, 1877. Geol. k. F.-J. Wasserleitung, p. 378, 



pi. xvi, 6, fig. 17. 



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



— — MObius, 1880. Meeresf. Mauritius, &c., p. 89, pi. viii, fig. 3. 



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



— — Green, 1881. Amer. Journ. Microsc, 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. ivii, 



figs. 22, 24, 28, 29. 



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



fig. 6. 



— — Brady, Parker, and Jones, 1888. Trans. Zool. Soc, vol. xii, 



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



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



vol. iii, p. 431, pi. ii, fig. 2 {:= Pkialina 

 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 strise. In 

 our figured specimen the stride 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. lineafa, Williamson, appears to be the most delicately striate oi the Lag enas ; 

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

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

 or stdci. In this aspect the intervals of the strige may be said to become ridges. 

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

 between the stride ; 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 difi'used, 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 Laqena gracilis. ^ ....^ 



^^ — S?,\ 



