HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 409 



but I chose it for illustration as it was in the best condition. The 

 tube is short and straight. These forms may be allied to Lagena 

 marginato-radiata Seguenza, 1880, p. 332, pi. 17, fig. 35. 



Lagena marginata Walker and Boys var. nov. elegans 



(PL 18, tig. 12). 



Test compressed, carinate. The body of the test is covered 

 with fine, broken-up striae, and is apiculate. The carina joins 

 on to the apiculate process. This is a very neat form, and two 

 examples only were found. Locality : No. 26. 



Lagena marginata Walker and Boys var. nov. retrocostata 



(PI. 18, tig. 13). 



Test compressed, carinate, with irregular costae running across 

 each face, one (or two) of which curves back before it reaches the 

 opposite side. There is a well -developed ring at the base. The 

 orifice is small and circular, or nearly so. Four only occur. 

 The costae are not always arranged as in the drawing, but they 

 have the same characteristics, and there is no mistaking the 

 species when once seen. Locality: One was found at No. 8. 

 The other stations are uncertain. 



Lagena marginata Walker and Boys var. nov. armata 



(PI. 18, tig. U). 



Test compressed, carinate. The orifice, which is circular and 

 outspread, is slightly bent forwards. On both faces of the shell 

 are two dimples, placed low down and close to the keel. In the 

 centre of each of these dimples is a small " boss." There was 

 only a single example of this interesting variety found, and I have 

 either lost it or misplaced it on the slide. Locality : No. 9. 



Lagena marginata Walker and Boys var. nov. homunculm 



(PI. 18, fig. 15). 



Test compressed, carinate. Aperture fissurine, with a pointed 

 spine curving downwards on either side. Low down on each side 

 of the test a short spine projects, and between these at the base 

 are two flattened processes, shaped like feet with the toes turned 

 inwards. In several instances another spine, but pointed, is placed 

 between the feet. This seems to be a variety of L. margiiiata, 

 in which the keel is broken up in an extraordinary mannei'. 



