50 BUULETIN 104, UNITED STATES NATIONAL MUSEUM. 



LAGENA SEMISTRIATA Williamson. 



Plate 9, fig. 15. 



Lagcna striata (D'Orrigny), var. seniistriata Williamson, Ann. Mag. Nat. 

 Hist., ser. 2, vol. 1, 1848, p. 14, pi. 1, fig.s. 9, 10. 



Lagena ruU/aris Williamson, var. seniistriata Williamson, Rec. Forara. 

 Great Britain, 1858, p. 6, pi. 1, fig. 9. 



Lagena sulcata (Walker and Jacob), var. seniistriata Parker and Jones, 

 Philos. Trans., vol. 155. 1865, p. 350, pi. 13, fig. 23. 



Lagena seniistriata Jones, Parker, and H. B. Brady, Monogr. Foram. 

 Crag, 186G, p. 34, pi. 4, fig. 6. — Balkwill and Wright, Proc. Roy. 

 Irish Acad., ser. 2, vol. 3, 1882, p. 548.— H. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 465, pi. 57, figs. 14, 16, 17. — Balkwiu:. 

 and Wright, Trans. Roy. Irish Acad., vol. 28, 1885, p. 339.— H. B. 

 Brady, Joiirn. Roy. Micr. Soc, 1887, p. 903. — Wright, Proc. Roy. Irish 

 Acad., ser. 3, vol. 1, 1891, p. 479. — Robertson, Proc. Nat. Hist. Soc. 

 Glasgow, pt. 3, 1892. p. 241.— Woodward, The Observer, vol. 4, 1893, 

 p. 143. — Egger, Abh. kon. bay. Akad. Wiss. Miinchen, CI. II, vol. 18, 

 1893, p. 327, pi. 10, figs. 34, 39.— Goiss, Kongl. Svensk. Vet. Akad. 

 Handl., vol. 25. No. 9, 1894, p. 76, pi. 13, fig. 737.— Morton. Proc. Port- 

 land Soc, 1897, p. 117.— Wright, Irish Nat., vol. 9, No. 3, 1900. p. 54.— 

 Millett, Journ. Roy. Micr. Soc, 1901, p. 486, pi. 8. figs. 2, 3. — 

 Whiteaves, Geol. Survey, Canada, 1901, p. 10. — Earland, Journ. 

 Quekett Micr. Club, ser. 2, vol. 9, No. 57, 1905. p. 211. — Sidebottom, 

 Mem. Proc. Manchester Lit. Philos. Soc, vol. 50, No. 5, 1906, p. 3. — 

 Balkwill and Millett, Rec. Foram. Galway, 1908, p. 5. — Heron- 

 Allen and Earland, Journ. Roy. Micr. Soc, 1909, p. 424. — Sidebottom, 

 Mem. Proc. Manchester Lit. Philos. Soc, vol. 54, No. 16, 1910, p. 16, 

 pi. 2, fig. 2.— Bagg, Bull. 513, U. S. Geol. Survey, 1912, p. 50, pi. 14, 

 figs. 1-5. — Heron-Atxen and Earland, Proc. Roy. Irish Acad., vol. 31, 

 pt. 64, 1913. p. 78.— Pearcey, Trans. Roy. Soc Edinb., vol. 49, 1914, 

 p. 1018. — Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, 

 1915, p. 658; Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 245; 

 Journ. Roy. Micr. Soc, 1916. p. 45.— Cushman, Bull. 676, U. S. Geol. 

 Survey, 1918, p. 9, pi. 2, fig. 3; Proc U. S. Nat. Mus., vol. 56, 1919, 

 p. 610 ; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 179. 



Description. — Test typically consisting of a somewhat pyriform 

 body, the base truncate and rounded, the upper end extending out 

 into a long cylindrical neck with a slightly spreading lip; surface 

 of the test ornamented by a few longitudinal costae, largely confined 

 to the basal portion of the test, variable in length, surface otherwise 

 smooth. 



Length up to 0.30 mm. 



Distribution. — I have had no specimens from the western Atlantic 

 which seem to be this species, nor is it recorded from the region 

 south of the Gulf of St. Lawrence. There are records for it off 

 Labrador, in Gaspe Bay, in the Gulf of St. Lawrence. It is very 

 numerous about the British Isles, as the long list of references 

 shows, and there are a few other records for it elsewhere. 



