HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 179 



" The markings appear to be knife-edged costae, from one side 

 of which triangular processes project at intervals. The apex of 

 the process barely touches the inner side of the adjoining co^ta. 

 . . . The triangular processes are Hush with the costae at their 

 base, but apparently sink away towards the apex, which is 

 probably but little raised above the wall of the test. The sunken 

 parts between the processes have a matt surface, whereas the 

 processes and costae are quite translucent." 



I may say that my own examination of the test agrees to a 

 great extent with the above, but I think the edges of the costae 

 are waved (see PI. 16, fig. 3). 



In a second communication Mr. Earland writes : " I succeeded 

 in getting a stereoscopic view of the shell under a ^ in. yesterday, 

 and it gave rather a fresh view of its structure. It seemed to be 

 covered with lines of pyramidal points in broken lines. Each 

 pyramid is a blunt spine." 



I have not succeeded, however, in seeing these characters of the 

 test. 



The figure (PI. 16, fig. 2) gives the effect of what I think I see 

 under the microscope, and it coincides to a great extent with 

 Mr. Earland's first description, though the details given in his 

 second communication do not appear to me to be necessarily 

 contradictory. I wish to acknowledge my sense of the trouble 

 Mr. Earland has taken in the matter. 



Lagena spumosa Millett (PI. 16, fig. 4). 



Lagena spumosa Millett, 1901, p. 9, pi. 1, fig. 9. 



Most of the tests are slightly curved at the oral end, but the 

 " bird's-clawlike " process is more slender than is indicated in 

 Mr. Millett's illustration. Several are more elongate than the 

 one figured. Locality . Frequent at No. 22 ; Nos. 24. 38, 40, 42, 

 43, and a few other stations. 



Lagena spumosa Millett, var. 



Lagena spumosa Millett var. Sidebottom, 1912, Journ. Q. 21. C, 

 p. 398, pi. 16, fig. 30. 



It is curious that the aboral end of the test appears to have 

 teen slightly abraded, I think in all cases. Locality : Nos. 4, 6, 

 7, 10, 11^ 13, 24, 25, 33, 35, 39, 40, 42, 43. 



