FOEAMINIFERA OF THE KEBIMBA ASCIIIPELAGO. 703 



what rough appearance to the superior surface of the shell. In many of the individuals 

 all but the final chambers are of a delicate pink colour — in this point, again, the 

 specimens seem to show their affinity to Biscorhina. The aperture is very obscure 

 owing to the presence of secondary shell-matter in the umbilical depression, the base 

 is often but not invariably decorated with fine strife leading from the peripheral edge 

 into the umbilicus. Double (or budding) and triple (or associated) specimens were 

 found at Stn. 7. 



The specific name glohosa was used by Marsson for a shell wliich he named 

 Biscorlina glohosa (M. 1878, SIR. p. 163, pi. iv. fig. 32), but, as his specimens are 

 referable either to PuUenia ohliqidloculata or some nonionine isomorph of that species, 

 the name glohosa lapsed and is available for this species. 



371. Discorbina pulvinata Brady. 



Discorbina pulvinata Brady, 1884, FC, p. 650, pi. Ixxxviii. fig. 10. 

 Egger, 1893, FG. p. 391, pi. XV. figs. 33-35. 

 „ „ Millett, 1898, etc., FM. 1903, p. 701. 



„ Sidebottom, 1904, etc., RFD. 1908, p. 14, pi. v. fig. 4. 



6 Stations. 



Occurs rarely at the Stns,, most abundantly at Stn. 3, where a variety was also 

 observed in which the basal portion is smooth instead of striate as in the type. Ai 

 Stn. 11 the species presented a variation approaching U. crhtata Heron-Allen & 

 Earland, the superior face of each chamber being decorated with vertical crests. At 

 this Stn. also several specimens were observed which had been in association with 

 others, the base and internal septa having been absorbed. 



372. Discorbina patelliformis Brady. (Pi. Lll. fig. 32.) 



Discorbina pat elliformis Brady, 1884, FC. p. 647, pi. Ixxxviii. fig. 3, pi. Ixxxi.x. fig. 1. 

 Egger, 1893, FG. p. 390, pi. XV. figs. 48-50. 

 „ „ Millett, 1898, etc., PM. 1903, p. 700. 



Sidebottom, 1904, etc., EFD. 1908, p. 14, pi. v. fig. 3. 



16 Stations. 



Occurs at nearly every Stn. and often in considerable numbers, but, as a rule, the 

 specimens present characteristics more or less tending in the direction of D. taberna- 

 rutaris, from which species it is often difficult to separate them. Typical individuals 

 were observed at Stns. 1, 2, 3, and 9. At Stn. 6 the species was fairly common and 

 the individuals large, presenting two distinct types — a normally low and a xevy highly 

 domed form. At Stns. 2, 5, 8, and 11 all the specimens were poor and hardly 

 separable from D. tahemacularis, the external surface being covered with a thick shell- 

 substance disposed in ridges radiating from the apex of the cone as in that species. 

 Double (or budding) specimens of this form, which we figure, were found at Stn. 9. 



VOL. XX. — PAET XVII. No. 21. — November, 1915. -5 v 



