HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 181 



are two examples with three keels, and two with five keels. 

 Locality : One specimen at No. 1. Other stations uncertain. 



Note. One or two examples occur with four keels which are 

 not tubulated. These I should place as a variety of L. striata. 



Lagena sp. in cert. 



Lagena sp. incert. Sidebottom, 1912, Journ. Q. M. C, p. 399, pi. 17, 

 figs. 4, 5. 



Locality : Three examples at No. 2, two at No. 24. 



Lagena laevigata Reuss, sp. (PL 16, fig. 5). 

 Fissurina laevigata Reuss, 1850, p. 366, pi. 46, fig. 1. 



Large and small examples of the type-form occur, but they are 

 not numerous. It is impossible to separate L. laevigata from 

 L. acuta, as the one passes insensibly into the other. Many other 

 examples are present in which the orifice is not central. Forms 

 ranging round Fissurina oblonga Reuss, 1862 (1863), pi. 7, fig. 89, 

 are frequent, and are found at many stations. A few specimens 

 occur that are circular in outline. 



PI. 16, fig. 5. There are two sets of these and they vary a little. 

 Some have the appearance of being subcarinate, but this seems 

 to be caused by the test being clearer at its edge than at any other 

 part. Only two or three examples have the spines at the orifice 

 well developed, and most have a small wing at either side of the 

 neck. There is no internal tube. Locality : Nos. 42-44. 



Note. These are not far removed from L. falcata Chaster, 

 1892, p. 6, pi. 1, fig. 7. On another square (locality uncertain) 

 there is one typical form, and there are also one or two others 

 that are carinate at the base, which seem to be intermediate 

 between L. falcata and Mr. Millett's figure of L. marginata var. 

 Millett, 1901, p. 497, pi. 8, fig. 21. 



Lagena laevigata Reuss sp. var. virgulata Sidebottom (PI. 16, 



fig. 6). 



Lagena laevigata Reuss sp. var. virgulata Sidebottom, 1912, 

 Journ. Q. 21. C, p. 400, pi. 17, fig. 8. 



PI. 16, fig. 6. A few fine examples placed amongst others which 

 are too opaque for me to be certain whether they belong to this 

 variation. Locality : Uncertain. 



