22, MR. F. CHAPMAN ON FORAMINIFERA 
Edward Belcher; also from Kandavu, Fiji, 210 fathoms, form B 
(in the British Museum, Natural History, labelled C. Carpenteri 
in Dr. H. B. Brady’s handwriting) ; from Mauritius (specimens 
of form A found by the Author, through the kind offices of 
Prof. Jeffrey Bell, on a Turbinaria in the British Museum); and 
from the Solomon Islands, amongst specimens which Capt. Guppy 
had sent Sir John Murray * (a specimen of form A). There is 
also an irregular, annulate variety in the British Museum, 
probably of O. Oarpenteri (form A), from the Macclesfield Bank, 
China Sea, 30 fathoms. 
The genus Oycloclypeus is also represented as fossils in the 
Tertiary limestones of early date on the S.E. coast of Arabia 
(Carter) ; from the Tertiaries of Java (Martin) ; and from similar 
rocks in Borneo (Newton & Holland). 
CycLocLyPeus CarPENTERI, Brady. (Pl. 2. figs. 6,7; Pl. 3. 
figs. 1-5.) 
Form A. 
Cycloclypeus, Carpenter, 1856, Phil. Trans. vol. exlvi. p. 155, pl. xxx. 
fies. 1 & 8; idem, 1862, Introd. Study Foram. p. 292, pl. xix. fig. 2. 
C. Guembelianus, Brady, 1881, Quart. Journ. Micr. Sci., n. s., vol. xxi. 
p- 66 (young form); idem, 1884, Rep. Chall. vol. ix. p, 751, pl. cxi. 
fies. 8a, b (young form). 
C. Carpenteri, Brady, Lister, 1895, Phil. Trans. vol. 1868. pp. 487, 438, 
pl. ix. figs. 52-54. 
C. Guembelianus, Brady, Verbeek and Fennema, Descr. géol. Java et 
Madoura, vol. i. pl. ix. fig. 127. 
Form B. 
Cycloclypeus, Carpenter, 1852, Phil. Trans. vol. cxlvi. p. 555 ; idem, 1862, 
Introd. Study Foram. p. 292. 
C. Carpentert, Brady, 1881, Quart. Journ. Micr. Sci., n. s., vol. xxi. p. 67 ; 
idem, 1884, Rep. Chall. vol. ix. p. 751; Martin, 1896, Jaarb. Mijn. Ned. 
Oost-Ind. pp. 53, 54. 
The series of specimens, which, from a biological standpoint, is 
referable to one species, consists of two dimorphic types, each 
represented by immature and adult specimens, with here and 
there some gradational links. It is a significant fact, which 
asserted itself during the examination of the specimens from 
Funafuti, and is borne out by material from other localities, that 
the young and the adult stages of the shell in each form, A and 
* To whom the author is indebted for the opportunity of examining these 
and other specimens at the ‘Chalienger’ Office. 
