REPORT ON THE FORAMINIFERA. 
615 
later memoirs, associates Pullenia with Cristellaria to form the Family Cbistellaridea , 1 
and the same course is adopted by Hantken. 2 Sch wager makes the genus the type of a 
distinct Family, Pullenid^e, which includes Nonionina, Polystomella, Fusulina, and 
Melonia; 3 whilst with Biitschli it serves as the type of the Pullenince, a Sub-family of 
Nummulitin^e, and is therein associated with Splicer oidina, Endothyra, Amphistegina, 
&c. 4 
The test of Pullenia is a nautiloid spire of two to four convolutions, either regular 
and equilateral in its mode of growth or one-sided and oblique, each convolution com- 
pletely enclosing the preceding one. The segments number four to six in each circuit ; 
the sutures are flush in the smaller varieties, whilst those of the larger forms are some- 
what depressed externally. The septal face is comparatively narrow, and the aperture 
is either an arched fissure extending nearly from pole to pole, or in the oblique forms a 
long gaping orifice at the inner border of the final segment. The surface of the shell is 
smooth and glassy, and the pores are very minute, as compared with those of most 
of the other Globigerine types. 
The separation of Pullenia from Nonionina, to which it has considerable resemblance 
at first sight, is dictated partly by the nature of the aperture and partly by the abseuce 
of the Polystomelline characters, which, though often feebly developed, may always be 
detected in one guise or other in specimens of the latter genus. The relationship of the 
large, oblique, subglobular forms of Pullenia to Sphceroidina and Globigerina is toler- 
ably apparent when a number of specimens are seen together, and the affinity of the 
three genera is further suggested by their remarkable similarity of distribution. 
Of the three recent species of Pullenia, one has been taken living at the surface of 
the open sea, the others are known only from bottom-specimens. The genus has been 
found at every latitude and at almost every depth hitherto explored by sounding-line or 
dredge. It is also a well-known fossil type, occurring in marine strata of every geologi- 
cal age from the middle of the Cretaceous period down to recent times. 
Pullenia splicer oides, d’Orbigny, sp. (PI. LXXXIY. figs. 12, 13). 
Nonionina sphoeroides, d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. p. 293, No. 1. — Module, 
No. 43. 
„ bulloides, Id. Ibid. p. 293, No. 2 (name only). 
,, „ Id. 1846, For. Foss. Vien., p. 107, pi. v. figs. 8-10. 
„ quaternaria, Reuss, 1850, Haidinger’s Naturw. Abhandl., vol. iv. p. 34, pi. iii. 
fig. 13. 
1 Denkschr. d. k. Alcad. Wiss. Wien, 1866, vol. xxv. p. 206. 
2 Mitth. Jahrb. d. k. ung. geol. Amtalt, vol. iv. p. 59. 
s Saggio di una Classificazione dei Foraminiferi, p. 14. 
4 Bronn, Kl. u. Ord. des Thier-Reicfis, 1880, vol. i. p. 210. 
