HENRY SIDEBOTTOiM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 171 



eight to ten costae. Entosolenian tube straight. Locality : 

 Ud certain ; probably No. 22 and a few other stations. 



PI. 15, fig. 19. These appear to be the same, but they have 

 only six costae, and occur more frequently. .Nos. 15, 17-20, 23, 

 24, 29, 33-36. 



+ P1. 15, fig. 16. Locality: Many stations throughout the 

 whole series. 



+ P1. 15, fig. 19. Locality: No. 43. 



Lagena acuticosta Reuss (PI. 15, fig. 20). 

 Lagena acuticosta Reuss, 1861, p. 305, pi. 1, fig. 4. 



An unsatisfactory species, for it is linked closely with L. costata 

 on the one hand, and L. sulcata on the other. Locality: Many 

 stations up to No. 22 ; afterwards extremely rare. 



PI. 15, fig. 20. An odd specimen, probably a very weak form. 

 Locality : Uncertain. 



+ PI. 15, fig. 22. Tests similar or nearly so oc^ur, but they are 

 not so large. Locality : Nos. 2, 7, and a few other stations. 



Lagena melo d'Orbigny sp. 

 Oolina melo d'Orbigny, 1839, p. 20, pi. 5, fig. 9. 



There are several fine typical examples and a few small ores 

 on the slide, but as they are mixed with other varieties the 

 locality cannot be determined. 



The form with the cross-bars sunk, which is assigned by 

 Reuss to L. catenulata Williamson, 1862 (1833), pi. 6, fig. 75, is 

 also present. 



Lagena hexagona Williamson sp. (PI. 15, figs. 21-23). 



Entosolenia squamosa var. hexagona Williamson, 1848, p. 20, pi. 2, 

 fig. 23. 



Very many beautiful specimens occur ; some are globular, 

 others pyriform, with and without necks. The depth and size of 

 the mesh var} 7 greatly. 



A few, w^hich I take to be L. geomeirica Reuss, 1862 (1863), 

 pi. 5, fig. 74, are exquisite, although the arrangement of their 

 cells is not always parallel. The cells are deep, and their sides 

 exceedingly delicate. Several have short necks. I have not 

 attempted to draw them, as I could not have produced the 



