404 HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 



my way to separate them from L. staphyllearia. The tube is 

 straight. Zom/i^?/ . Nos. 1, 3, 6, 7, 9, 14, 15, 17, 26. Always 

 extremely rare. 



PI. 17, fig. 24. Mr. Millett, in his remarks on L. inarginata 

 var. seminiformis, 1901, p. 620, refers to the tendency of 

 L. marginata and its allies to duplicate the marginal keel. This 

 is a case in point, the keel splitting on either side of the test as 

 it approaches the base. The two longest spines are situated just 

 at the splitting point, and generally there are two rows of smaller 

 -spines on the base of the test, between the keels. The tube is, 

 -attached to one face of the test, and the orifice is fissurine. 

 Rather rare. Locality : No. 19. 



With the above are three tests that have a comparatively 

 thick keel, which is thicker at its outer edge than at its junction 

 with the body. This causes the latter to appear as if it were 

 encircled by a fine, dark ring a pretty effect. The keel splits at 

 the base just sufliciently to admit of the spines being placed 

 between. The tests are circular in outline and their sides 

 ^convex. Locality : One at No. 19, the other two uncertain. 



Lagena staphyllearia Schwager var. nov. quadricarinata 



(PI. 21, fig. 16). 



Test very slightly compressed, almost circular in outline. 

 Internal tube attached. Orifice a narrow slit. The carina at 

 the sides is very much more developed than the one that cuts 

 it at right angles through the centre of the base. Locality : 

 Eight occur at No. 1, two at No. 3, and odd specimens at Nos. 

 14, 29, 32. 



Lagena unguiculata Brady (PI. 17, fig. 25). 



Lage7ia unguiculata Brady, 1881, Quart. Journ. Micr. Sci., vol. 21, 



N.S., p. 61. 

 Lagena uyiguiculata Brady, 1884, p. 474, pi. 59, fig. 12. 



Brady admits that this differs little from L. staphyllearia, and 

 the curved teeth he refers to are not confined to this variety. All 

 the tests in these gatherings have the lower part of the body 

 roughened and opaque, as shown in the drawing. The oral end 

 is sharp and the tube short and straight. Locality : At No. 1, 

 eight occur ; at No. 23, one ; at No. 24, two ; and one at Nos. 25, 

 26, 27 : fourteen in all. 



