14 SiDEBOTTOM, Forauiinifera from the Island of D do s. 



cause the test to be rugose. Along the sutural lines the 

 pores hardly show, and so the tests have a more or less 

 striped appearance. A good deal of exogenous shell 

 growth is present in the umbilical region of the larger 

 specimens, the inferior surface being decorated with 

 radiating lines of minute tubercles. Rather frequent. 



Mr. Millett figures a variety of D. iinperatoria in his 

 Malay report (:03), pi. 7, fig. 6, under the name of Z>/.y- 

 corbiua iinperatoria, d'Orb., var. g/obosa. 



Discorbina patelliformis, Brady. (PI. 5, fig. 3.) 



Discorbina patelliformis, Brady ('84), p. 647, pi. 88, 

 fig. 3 and pi. 89, fig. I. 



D. patelliformis (Brady), Egger ('93), p. 390, pi. 15, 

 figs. 48-50. 



Two of the specimens are particularly elegant ; they 

 are the largest of those found, and have the chambers of 

 the last two whorls inflated, the peripheral outline being 

 much lobulated, and the pores more marked. Very rare. 



Discorbina pulvinata, Brady. (PI. 5, fig. 4). 



Discorbina pulvijiata, Brady ('84), p. 650, pl. 88, fig. 10. 



D. pulvinata (Brady), Egger ('93), p. 391, pl. 15, figs. 

 33~35- 



Brady, in his provisional description of this species, 

 puts the number of chambers in the last convolution at 

 about three. The Delos specimens have five, with the 

 exception of two or three, which have six. I have speci- 

 mens also from off the island of Rhodes. Very frequent. 



A variety occurs which has only three or four 

 chambers in the last convolution, these latter are not 

 nearly so compressed, and the chambers on the superior 

 surface are difficult to distinguish owing to exuberant 

 shell growth. In colour they are white. Very rare. 



