HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 417 



Lagena orbignyana Seguenza var. nov. stellata (PI. 19, 



fig. 19). 



Test oval, tricarinate and apiculate. Orifice slightly pro- 

 truding. Central portion of both faces of the test pitted and the 

 remaining portion decorated with a series of fine arches. Ento- 

 solenian tube short and straight. The decoration is more delicate 

 than shown in the illustration. Only a single example found. 

 Locality : No. 13. 



Lagena orbignyana Seguenza var. nov. cnrvicostata (PI. 19, 



fig. 20). 



The two side keels are recurved at the base and join the 

 central keel, which is well developed. The decoration is a series 

 of grooves, which are mostly bent as they approach the border 

 and are sometimes irregular. Only one occurs. Locality : 

 Uncertain. 



Lagena orbignyana Seguenza var. imdleriana Wright 



(PI. 19, fig. 21). 



Lagena oi'hignyana var. ivalleriana Wright, 1886, Proc. R. Lrish 

 Acad., ser. 2, vol. 4, p. 611, and 1891, p. 481, pi. 20, fig. 8. 



The central " boss " is very slightly raised and surrounded by a 

 ring. In some of the examples the " boss " is absent, but the 

 ring is present. Over thirty are on the slide, and they are 

 marked as occurring at eight stations. Locality : Chiefly Nos. 8, 

 13, 19. 



Lagena orbignyana Seguenza var. nov. imicostata (PI. 19, 



fig. 22). 



In this variety there is a single costa running lengthwise down 

 the centre of each face of the test. Ten occur and one is in the 

 trifacial condition. In two other examples the costa is absent. 

 Locality : Three occur at No. 18. 



Lagena orbignyana Seguenza var. nov. concentrica (PL 19, 



fig. 23). 



Test compressed. Central keel well developed. This solitary 

 specimen has the faces of the test decorated with arched costae, 



