HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 427 



tubular process projects at each corner of the base. The body 

 of the test is covered with fine, broken-up striae. 



I believe the type form to be four-sided, as it occurs very 

 rarely in the trifacial condition (see fig. 12). Locality : Chiefly 

 Nos. 1, 13, 17, 19. 



Xote. There are a few of the three-sided ones in which the 

 tubular processes are absent, but they appear to belong to the 

 ame set. 



Lagena semicostata sp. nov. (PI. 21, fig. 13). 



Test compressed, irregularly ovate, the upper part squared off 

 at the sides. The entosolenian tube is straight. A series of very 

 fine, curving costae, running parallel to each other, partially 

 ^encircles the sides and lower half of the test. At the base, on 

 either side, is a ridge that divides the curving costae into two 

 ets. Only one found. Locality : No. 34. 



Lagena sacculiformis sp. nov. (PI. 21, fig. H). 



Test oblong, apiculate, asymmetrical, one side being very 

 convex, the other only slightly so, and always having a com- 

 pressed part at the centre of the slightly convex side. Orifice 

 at the end of a short neck, which is placed at the junction of 

 the two sides. There is no internal tube, and the surface of 

 the shell is smooth and polished. Locality : One found at No. 2, 

 one at No. 11, and five at No. 19. 



Lagena protea Chaster. 

 Lagena pi'otea Chaster, 1892, p. 62, pi. 1, fig. 14. 



Nineteen are marked on the Chart, and they vary in size and 

 shape. There can be little doubt that this form is generally 

 adherent. After studying the large numbers that have come 

 under my observation from many localities, I am of opinion that 

 Dr. Chaster was right in treating them as true Lagenae. 



In a letter dated from Southport, February 8th, 1897, he 

 wi^ote me as follows, and I know that up to the time of his death 

 he had not changed his opinion : 



" I note your remarks upon my Lagena pi'otea. That Messrs. 



