36 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



always the flat side of the test — are features not to be overlooked. 

 The shape of the hood varies considerably and in some cases almost 

 attains the trumpet-like character of the aperture of L. MiUettii^ but, 

 of course, on a very mucli smaller scale." 



They also record it from the west of Scotland and off South Corn- 

 wall, rare in both cases. Wright recorded it from off the southwest- 

 ern coast of Ireland. 



LAGENA MARGINATA (Walker and Boys), var. SEMICARINATA Sidebottom. 



Plate 6, fig. 13. 



Lagena marginata (Walker and Boys), var. semicarinata Sidebottom, Mem. 

 Proc. Manchester Lit. Pliilos. Soc, vol. 50, No. 5, 190G, p. 10, pi. 2, 

 fig. 7. — Heeon-Allen and Eaeland, Proc. Roy. Irish Acad., vol. 31, 

 pt. 64, 1913, p. 85, pi. 7, fig. 4. 



The only Atlantic record seems to be that of Heron-Allen and 

 Earland, from whom the figure is copied as well as the following 

 notes : 



" We have one specimen from Station 13 wdiich w^e are inclined to 

 attribute to Mr. Sidebottom's variety in spite of certain essential 

 differences. In the text of his paper he described the variety under 

 the name of L. inaequilateralis Wright var. semi-marginata (nov.), 

 no doubt overlooking the fact that his varietal name had already 

 been appropriated by Reuss. In the plate, however, this specimen 

 is described as var. semi-carinata. Mr. Sidebottom's specimen is de- 

 scribed as ' an interesting variation of L. marginata var, inaequilat- 

 eralis Wright. The mouth is the same as in Mr. Wright's form, and 

 the test is also inequilateral. The keel, however, is confined to the 

 aboral end of the test and is well developed.' 



" Our specimen differs, inasmuch as the aperture is fissurine, and 

 the shell is of the normal equally biconvex type, with an attached en- 

 tosolenian tube. The marginal keel, however, exactly resembles Mr. 

 Sidebottom's figure in position and extent." 



LAGENA MARGINATA (Walker and Boys), var. SEMIMARGINATA Reuss. 



Plate 6, figs. 14, 15. 



The only Atlantic records for this species are given by Brady ,° 

 off Prince Edwards Island, 50-150 fathoms (91-274 meters), off 

 Heard Island, 75 fathoms (137 meters), and three stations in the 

 middle of the South Atlantic, 1,900, 2,200 and 2,350 fathoms (3,475, 

 4,024, and 4,298 meters) . Heron-Allen and Earland '' record a single 

 specimen from the west of Scotland. 



•Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 477, pi. 59. figs. 17, 19. 

 * Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 251. 



