204 HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC 



Lagena invaginata sp. nov. (PL 18, fig. 13). 



Test slightly carinate ; oral end protruding and arched ; 

 orifice a narrow slit, perhaps barred. The front highly convex ; 

 the back flat, with a large concave recess at the base. The 

 entosolenian tube long and bent to one side. Twenty-one 

 examples occur. Locality : Nos. 38, 41, 42 ; chiefly at No. 42. 



Lagena reniformis sp. nov. (PI. 18, fig. 14). 



The test reminds one of a kidney bean in shape ; the orifice is 

 situated on one side of the median line. The entosolenian tube 

 is long and attached. A few of the specimens are not nearly so 

 wide in relation to the height as the one figured. Locality : 

 About sixteen at No. 44. It occurs also at several other 

 stations. 



Lagena reniformis sp. nov. var. (PI. 18, fig. 15). 



I am treating this as a variation of the above. I believe the 

 orifice is composed of a series of pores, at any rate it is exceed- 

 ingly narrow. There are two other tests along with it, in which 

 the width is about equal to the height, but I think they belong 

 to the same variety. Locality : Uncertain. 



Lagena reniformis sp. nov. var. spinigera (PI. 18, fig. 16). 



The test is compressed, and the two spines, one on either side, 

 project upwards. The orifice is slightly sunk, and the tube is 

 long and attached, reaching almost round the shell. Two 

 specimens only found. Locality : Nos. 29, 44. 



Lagena sp. incerfc. (PI. 18, fig. 17). 



Probably this is only L. marginata in a contorted condition. 

 The test is carinate, compressed and twisted. Two occur. 

 Locality : Both at No. 15 ; or one at No. 1 and the other at 

 No. 15. 



Lagena lagenoides Williamson sp. var. (PI. 18, fig. 18). 



The test is elongate, not much compressed, and bicarinate. 

 Aperture fissurine. The keels, which only project slightly, are 

 tubulated. 



I take this to be an elongate variety of L. lagenoides, William- 

 son sp., pi. 17, fig. 1. Three occur. Locality : No. 40. 



