726 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



secondary shell-substance in the form of beads, as in var. plana, but the pink colour, 

 which is permanent, is a definite and discriminating feature. Chapman (C. 1900, 

 FLF. p. 201), in dealing with Polytrema plana from Funafuti, records that the 

 specimens are often discoloured or yellowish, but never pink or rose-coloured. On the 

 other hand, in recording Gypsina inhcerens from the Cocos Keeling Atoll, he points out 

 that " the specimens are remarkable for their deep rose colour " {vide ante, no. 430). 



M. Schultze (S. 1854, OP. p. 68, pi. vi. fig. 12) refers to Gypsina {Acervulina) 

 hihm-ens as being brownish, owing to the colour of the living protoplasm. He also 

 figures and describes a species, Acervulma acinosa, from the Philippine Islands, which 

 may be related to our variety, but differs from it in the shape of the chambers, which 

 are described as being globular and arranged like a bunch of grapes, red-brown in 

 colour. Schultze's species also differs from our var. rubra in the surface of the 

 chambers, which are represented as being smooth. 



We have found specimens resembling our Kerimba types in shore-sands from 

 Fremantle (W. Australia). It is probably widely distributed in shallow water across 

 the Indo-Pacific region, as we have other fine specimens from Lord Howe Island 

 (S. Pacific) in material recently sent us by Mr. E. D. Laurie. But by far the finest 

 specimens of this form which we have hitherto seen are on two slides in the Brady 

 Collection at Cambridge labelled Planorhilina ruhicunda Brady. These are from 

 Samoa (1885), Apia Beach and the Lufi-lufi reef respectively, the first beincj the 

 finest. It consists of fragments of coral rock encrusted with a dense growth of the 

 organism in all stages of development, from the small regular truncatuline shell to 

 large masses f inch in diameter. The surface of some of the chambers in the larger 

 growths is covered with secondary shell-matter in the form of strong projecting spines ; 

 the colour is in various shades of pink, approaching to red in some of the specimens. 

 Brady, although he recognized this distinctive form and gave it a name, never published 

 a description of it. We have not adopted his suggested specific name, as d'Orbigny's 

 has priority. Brady, no doubt, adopted his somewhat cumbrous specific name because 

 he was aware that d'Orbigny had already utilized the name rubra for a Planorbulina 

 Avhich, in the absence of an examination of the type, was a nomen nudum to him. 

 Reference to the type in Paris has proved that Brady's specimens were identical with 

 d'Orbigny's. 



433. Gypsina vesicularis (Parker & Jones). 



Orbitolina vesicularis Parker & Jones, 1859, etc., NF. 1860, p. 31. no. 5. 

 Tmoporus laivis Brady, 1864, IIFS. p. 470, pi. xlviii. fig. 17. 

 Gypsina vesicularis Carter, 1877, CB. p. 173. 



Brady, 1884, PC. p. 718, pi. ci. figs. 9-12. 

 Egger, 1893, FG. p. 382, pi. xiv. figs. 20-23. 

 „ „ Chapman, 1900, FLF. p. 198, pi. xix. fig. 12. 



Chapman, 1907, RFV. p. 140. 

 „ „ Heron-Allen & Earland, 1913, CI. p. 140, pi. xiii. fig. 11. 



