46 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



LAGENA PERLUCIDA (Montagu). 



Plate 8, tigs. 12, 13. 



Vermiculnm pcrlucklnm Montagu, Test. Brit., 1803. p. 525. pi. 14, fig. 3. 



Lagena pcrlucida Bkown, Illust. Conch. Great Britain, 1827, fly-leaf, pi. 

 1, fig. 29; edition 2, 1844, p. 3, pi. 56, fig. 29.— Schlumbekger, Fueille 

 des Jeunes Naturalistes, ann. 33, 18S2, pi. 1, fig. 2. — Heron-Allen and 

 Eaeland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 78; Trans. 

 Zool. Soc. London, vol. 20, 1915, p. 659 ; Trans. Linn. Soc. London, 

 ser. 2, vol. 11, 1916, p. 246; Journ. Roy. Micr. Soc, 1910, p. 45. 



Lagena vulgaris Williamson, var. pcrlucida Williamson, Rec. Foram. 

 Great Britain, 1858, p. 5, pi. 1, figs. 7, S. 



Bescriytlon. — Test somewhat pyriform, elon<]rate, widest near the 

 base, the apertural end contmued into an elonp;ate cylindrical slender 

 neck, with a sliglit lip, the opposite portion of the test with a few 

 fine longitudinal costae, extended part way up the body of the test; 

 surface otherwise smooth. 



Length up to 0.25 mm. 



Distribution. — All the records for this species seem to be from 

 about the British Isles, except that of Heron-Allen and Earland, who 

 record it as " few and poor " from the Kerimba Archipelago, off the 

 southeastern coast of Africa. The only specimens I have had were 

 from Dog's Bay, Ireland, and from 10 miles off Glencoe, southwest 

 of Ireland, in 53 fathoms (97 meters), both from material received 

 from Mr. Joseph Wright. 



LAGENA PROTEA Chaster. 



Plate 9, figs. 1, 2. 



Lagena protea Chaster, First Rep. Southport Soc. Nat. Sci., 1890-1891 

 (1892), p. 62, pi. 1, fig. 14. — Sidebottom, Mem. Proc. Manchester Lit. 

 Philos. Soc, vol. 50, No. 5, 1906, p. 15, pi. 2, fig. 18; vol. 54, No. 16, 

 1910, p. 19, pi. 2, figs. 17, 18 ; Journ. Quekett Micr. Club, vol. 11, 1912, 

 p. 427. — Heron-Allen and Earland, Proc Roy. Irish Acad., vol. 31, 

 pt. 64, 1913, p. 74, pi. 7, figs. 19, 20. 



" This species occurs at four stations, the specimens being large 

 and well developed. As the name implies, no two are alike. Mr. 

 Sidebottom quotes a letter from the late Dr. Chaster supplementing 

 his original description of the species, and replying to various criti- 

 cisms to which the species had been subjected. In our opinion, 

 this form remains one of the most unsatisfactory with regard to its 

 affinities. There is little doubt that many of the specimens have 

 originally been sessile, a habit which is otherwise unknown in the 

 genus Lagena. Moreover, traces of apparent segmentation are not 

 uncommon, which in itself would remove the species from the genus 

 Lagena to L^olymoiyhina. But the quantity of available material is 

 not at present sufficient for final settlement of this question, and 



