rOEAMINIFEEA- OF THE KERIMBA AECHIPELAGO. 727 



9 Stations. 



Never very abundant, though occurring at most of the Stns. One exceptionally 



arge specimen at Stn. 12 and many good normal individuals at Stns. 9, 10, and 11. 

 The comparative rarity of this form, generally so abundant in tropical waters, is 

 noteworthy. 



434. Gypsina vesicularis, var. squamiformis Chapman. 



Gypsina vesicularis, var. squamiformis Chapman, 1900, FLF. p. 200, pi. xix. fio-. 15. 

 4 Stations. 



A few individuals, none of them quite in agreement with Chapman's diao'nosis, 

 which says that the shell consists of a single layer of chambers. In the Kerimba 

 specimens the central portion of the test always shows a few additional chambers 

 of an equally depressed and scale-like character superimposed on the initial 

 chambers. Such specimens form a connecting-link between Chapman's variety and 

 the planorbuline form of G. inhmrens so abundant in the material. The variety is in 

 our opinion much nearer to Q. inhcerens than to G. vesicularis. 



435. Gypsina vesicularis, var. monticulus Chapman. 



Gypsina vesicularis, var. mojiticulits Cliapman, 1900^ FLF. p. 200, pi. xix. fio-. 14. 

 2 Stations. 



One typical specimen at Stn. 9 and a weaker individual at Stn. 11. We have 

 nothing to add to Chapman's note on this variety. 



436. Gypsina vesicularis, var. discus Goes. 



Tinoporus vesicularis (Parker & Jones), Goes, 1882, RRCS. p. 104, pi. vii. figs. 245-247. 

 Gypsina vesicularis, var. discus G-oes, 1896, DOA. p. 74, pi. vii. figs. 4-6. 

 „ „ „ „ Chapman, 1900, FLF, p. 199, pi. xix. fig. 13. 



2 Stations. 



A few specimens at Stns. 3 and 11. The external surface in this species is very 

 obscure, the chambers being small and the sutural lines thin, flush with the surface 

 of the shell, and hardly visible. The sections shown by Goes represent a shell in 

 which tlie median layer of chambers is markedly diff'erentiated from the mass of later 

 acervuline chambers, which are superimposed on both faces of the test, thus indicating, 

 as the author points out, an affinity with the orbitoidal type of structure. 



437. Gypsina globulus (Reuss). 



Ceriopora globulus Reuss, 1847, Haidinger's Naturw. Abh. vol. ii. p. 33, pi. v. fig. 7. 

 Tinoporus baculatus, var. sphteroidalis Carter, 1877, CB. p. 215, pi. xiii. figs. 18, 20. 

 Gypsina globulus Brady, 1884, FC. p. 717, pi. ci. fig. 8. 



„ „ Chapman, 1895, FAS. p. 44. 



Chapmau, 1900, FLF. p. 198. 



„ „ Heroa-Alleu & Earland, 1913, CI. p. 140, pi. xiii. fig. 10. 



VOL. xs. — PART XVII. No. 24. — November., 1915. 5 i 



