384 MR. F. CHAPMAN ON THE 
almost on a spiroloculine plan, similar to the figure given by 
Millett of his Malay specimens *. 
PENEROPLIS (MoONALYSIDIUM) CYLINDRACEUS (Lam.). 
A very delicate little form, which by its thin shell-structure 
and simple oral aperture seems to belong to the subgeneric type 
Monalysidium. 
ORBITOLITES COMPLANATA, Lam., var. PuIcaTA, J. D. Dana. 
Marginopora vertebralis, Blainville, var. plicata, Dana, 1848, in Wilkes’ 
United States Exploring Expedition Reports, ‘‘ Zoophytes,” p. 706, [in 
vol. of plates referred to as Marginopora vertebralis?] pl. 60. figs. 9 
Oia;,0: 
Orbitolites laciniatus, Brady, 1881, Quart. Journ. Micr. Sci. vol. xxi. 
INES: (ps 4a. 
O. complanata, var. laciniata, Carpenter, 1885, Report on the Genus 
Orbitolites, Zool. Chall. Exp. part xxii. pl. vii. 
This is the well-known thick variety of Orbitolites with the 
plicated margin, and which Brady showed to be a stage of shell- 
growth dependent on a phase of reproduction, since the edge 
bears chamberlets with megalospheric young. J. D. Dana 
described this variety as plicata in 1848, and H. B. Brady 
appears to have overlooked this when he described his specimens 
from Fiji and elsewhere. 
HADDONTA MINOR, sp. nov. (PI. 36. figs. 1, 2.) 
Test attached by the earlier segments, which are frequently 
grouped in a triserial manner, as in Verneuilina, &e.; afterwards 
growing erect or in a vermiform fashion, similar to H. Torres- 
zensis, but is much smaller. Aperture horseshoe-shaped. 
Average length of test 2-4 mm. ; average diameter ‘7 mm. 
Avalau Islet; very rare. 
VERNEUILINA SPINULOSA (Heuwss). 
The specimens from Avalau Islet are in very fine condition, 
and the spinous processes are exceptionally long. 
PATELLINA CoRRUGATA, Williamson. 
It is very unusual to find this species in low latitudes, but it 
is not unknown from such localities ; it has, for instance, been 
recorded from Mauritius and elsewhere. It is, however, more 
abundant in temperate and colder areas. 
* Journ. R, Mier. Soc. 1898, p. 507, pl. xii. figs. 7 a—c. 
