HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 419 



Lagena bicarinata Terquem sp. (PI. 19, figs. 25-27, and 



PI. 20, fig. 1). 



Flssitrina hicarinata Terquem, 1882, p. 31, pi. 1 (9), fig. 24. 



PI. 19, fig. 25. This occurs in two forms; frequently with no 

 central ring, and very rarely with two, as in the type form. The 

 two forms are mixed on the slide. Tube straight. Locality : 

 Chiefly Nos. 8, 11, 12, 19. 



PI. 19, fig. 26. A few are in a spinous condition, as shown in 

 the drawing. When these spines are present there is generally a 

 certain amount of exogenous shell-growth. These specimens are 

 mixed, on the slide, with the two above named. 



PI. 19, fig. 27. In this the keels are feebly developed and 

 wide apart. The entosolenian tube is long, often sinuous, and is 

 attached to the face of the test.- Locality : It occurs at Nos. 1, 

 17, 18, 19, and a few other stations, but is always rare. 



Other forms occur, some very large and others small, some with 

 long necks and some without any. 



PI. 20, fig. 1. The body of the test is much more compressed 

 near the commencement of the neck than at the base, and the 

 side wings which spring from the neck split and join the ridges 

 that surround the body. I^ocality : No. 19. It is rare. 



Lagena bicarinata Terquem var. nov. imhricata (PI. 20, fig. 2). 



Projecting from the two ridges that surround the body of the 

 test on both faces is a series of short cross-bars that reaches half- 

 way across the edge of the test. Generally these cross-bars are 

 placed alternately and the spaces between are filled with shell - 

 growth. The internal tube is attached. Only one found. On 

 the same square is another solitary specimen, similar, except that 

 between the ridges surrounding the body there are two extra 

 ridges, and the cross-bars appear to be confined to the outer 

 portion. Locality : The two specimens are marked from No. 19 

 and No. 20, but to which station each belongs is uncertain. 



Lagena bicarinata Terquem var. nov. horrida (PI. 20, fig. 3). 



This fine specimen has the keels set well apart, right up to the 

 edge of the orifice. The space between them is filled with shell- 

 JouRN. Q. M. C, Series II. No. 70. 2? 



