12 
Transactions of the Society. 
P.fusiformis has been found in the Lower Lias of England, 
France, and Germany. It has also been recorded from the Upper 
Hils-clay and the Minimus- clay of North Germany (Beuss) ; from 
the Gault of Montcley, Wissant, and TAube (as P. prisca Berthelin) ; 
from the Bed Chalk of Speeton (as P. lactea, Burrows, Sherborn, and 
Bailey); from various strata in the Upper Cretaceous series; and 
from many Tertiary deposits. The figure referred to as P. lactea 
(elongate variety) in the Beport on the c Challenger 5 Foraminifera, 
taking it as an example of P.fusiformis , appears to be the only 
record of the species from a recent sounding. 
It is a noteworthy fact that the fistulose modification based upon 
this type is almost invariably of a uniform character, namely, an 
apical aggregate of short tubular processes radiating and turning 
downwards, and always short. In each of these characters it differs 
from the original figures of P. horrida (Beuss) * in that the latter 
form has longer, recurved, outgrowing tubules, and attached to a 
fundamental form like that of P. gutta d’Orbigny. These differences 
are, however, intrinsically small, and are probably modified according 
to the shape of the early form of the test. 
The ordinary form of this species was found at Folkestone in 
zone iii., very rare ; zone v., very rare ; zone xi., 50 ft. from the top, 
rare ; 45 ft., frequent ; 40 ft., very rare ; 35 ft., very rare ; 30 ft., 
very rare; 25 ft., rare ; 12 ft., frequent. 
The fistulose variety of P. fusiformis occurred in zone v., very 
rare ; zone xi., 50 ft. from the top, rare ; 25 ft., very rare ; 20 ft., 
very rare ; 12 ft., very rare. 
Polymorphina sororia Beuss, plate II. fig. 11. 
Polymorphina (Guttulina) sororia Beuss, 1862, Bull. Acad. 
Boy. Belg., ser. 2, vol. xv. p. 121, plate ii. figs. 25-9. Id., 1870, 
Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 487, No. 9. Schlicht, 
1870, Foram. Pietzpuhl, plate xxvi. figs. 4-12, 16, 18. Brady, 1884, 
Chalk Bep., vol. ix. p. 562, plate lxxi. figs. 15, 16. 
Fistulose Form, plate II. fig. 12. 
Aidostomella pediculus Alth, 1850, Haidinger’s Naturw. Abhandl., 
vol. iii. p. 264, plate xiii. fig. 17. Polymorphina sororia , fistulose 
form, Brady, 1884, Chalk Bep., vol. ix. p. 562, plate lxxiii. fig. 15. 
The test of P. sororia is in its typical condition more inflated and 
rounder in transverse section than P. fusiformis, and the arrangement 
and development of the chambers is also more irregular, one side of 
the test being in consequence of a greater convexity than the other. 
The aboral end of the test is usually more or less acuminate, thus 
* Globulina horrida Reuss, 1845, Yerstein. bohm. Kreidef., pt. ii. p. 110, pi. xliii. 
fig. 14. 
