HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 411 



<][uite, loses itself at the sides of the test. The tube is attached 

 -and the aperture compressed. Locality : No. 11. Rare. 



PI. 18, fig. 21. The peculiarity in this case is that the two 

 projections at the base close in upon a small, central spine, the 

 effect under the microscope being that of two loops formed by a 

 bright line. Locality : No. 11. Only two or three are in this 

 -condition. 



Lagena marginato -perforata Seguenza. 



I^agena anarginato-'perforata Seguenza, 1880, p. 332, pi. 17, fig. 34. 



These vary a good deal in their contour. A few only have the 

 keel fairly well developed. Locality : Very rare at a few stations. 



Another set is more elongate, and has the keel more developed 

 at the base than at the sides. In some cases the centre of the 

 test is free from markings. Locality : It occurs at a good many 

 stations, but is always rare, 



Lagena radiato-marginata Parker and Jones. 



Lagena radiato-marginata Parker and Jones, 1865, p. 355, pi. 18, 

 figs. 3a, 36, 



There are thirty-two examples of this beautiful Lagena on the 

 slide, and they are in perfect condition. Jjocality : It occurs at 

 various stations, but chiefiy at Nos. 20, 21, 22. 



Lagena wrightiana Brady. 



Lagena lorightiana Brady, Quart. Jour n. Micr. Sci. vol. 21, 1881, 



p. 62. 

 Lagena lurightiana Brady, 1884, p, 482, pi. 61, figs. 6, 7, 



Two or three only were found. They are small and are not in 

 very good condition. Locality : Uncertain. 



Lagena lagenoides Williamson sp. (PI. 18, figs. 22-29 



and PI. 19, figs. 1-3). 



Entosolenia marginata (Walker and Boys) var. lagenoides 

 Williamson, 1858, p. 11, pi. 1, figs. 25, 26. 



There are a large number of the type and its variations. Both 

 the long and short form, figured by Williamson, are present. 

 One set has the tube straight, and another has it attached. 

 Sometimes the tube is absent. 



