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



Lagena orbignyana Seguenza, var. (PI. 19, fig. 13). 



There are about twenty on the slide and th^y are in the 

 apiculate condition. In most cases, if not all, the apiculate 

 process is tubular. The entosolenian tube is straight. In a few 

 instances the orifice does not protrude, and in these cases the 

 entosolenian tube is attached. Locality : Chiefly at No. 11. 



Lagena orbignyana Seguenza, var. (PI. 19, fig. 14). 



After very careful examination I believe this minute foraminifer 

 to be feebly tricarinate. There seem to be traces of a central 

 ridge. Both faces of the test are highly convex, and the basal 

 spines are placed between the keels. It may be related to Mr. 

 Millett's L. orhiynyana var. calcar Millett, Malay Report, 1901, 

 p. 626, pi. 14, fig. 18. Locality : Uncertain. 



Lagena orbignyana Seguenza var. nov. coronata (PI. 6, 



fig. 15). 



This beautiful specimen has a broad, opaque band encircling 

 each face of the test, the central portion of the test being trans- 

 parent. The chief keel is dentate at the base. One only occurs. 

 Locality : No. 23. 



Lagena orbignyana Seguenza var. lacunata Burrows and 

 Holland (PI. 19, figs. 16-18). 



Lagena lacunata (Burrows and Holland) Jones, 1895, p. 205, 

 pi. 7, fig. 12. 



PI. 19, fig. 16. In these specimens the depressions are well 

 marked and their boundaries form an irregular, mesh-like 

 pattern. The effect is very pretty, as the depressions are 

 opaque and the mesh-work shows up dark. One specimen is 

 in the trifacial condition. Locality : Chiefly Nos. 1, 2, 19. 

 Frequent. 



PI. 19, figs. 17, 18. The markings are minute and in some cases 

 seem to be the orifices of pores, but of this I am not certain. In 

 the majority of cases the keels are feebly developed, and some- 

 times, as in fig. 18, they are hardly discernible. The entosolenian 

 tube is straight. Ljocality : Chiefly Nos. 19, 21. 



