ON THE GENUS POLYMORPHINA. | 225 
Polymorphina (Guttulina) lata, Egger, ibid. p. 288, pl. 13. figs. 22-24. 
P. communis, Morris & Quekett, 1860, Cat. Hunt. Mus. Coll. Surg. Eng. p. 88, 4 5. 
? Globulina bulloides, Reuss, 1861, Sitzungsb. k. Akad. Wissensch. vol. xliv. p. 318, pl. 3. fig. 4. 
Guttulina communis, Karrer, 1863, Sitzungsb. k. Akad. Wissench. vol. xlviii. (Table). 
G. fissurata, Stache, 1865, Novara-Reise, vol. i. 2** Abtheil. Paläont. Neu-Seeland, p. 263, pl. 24. fig. 10. 
G. obliquata, id. ibid. p. 264, pl. 24. fig. 11. 
Polymorphina problema, vax. deltoidea, Reuss, 1866, Denkschr. d. mathem.-natur. Classe d. k. Akad. 
Wissen. vol. xxv. p. 154, pl. 4. fig. 8. 
P. communis, Brady, 1868, in Crosskey and Robertson, 'Trans. Geol. Soc. Glasgow, vol. iii. p. 118. 
P. irregularis, Karrer, 1868, Sitzungsb. k. Akad. Wissensch. vol. lviii. p. 172. 
Guttulina, sp., Von Schlicht, 1869, Foram. Septar. Pietzpuhl, no. 435, pl. 27. figs. 22-25. 
Polymorphina, sp., id. ibid. no. 493, pl. 32. figs. 17-20. 
Characters.—Shell ovate, gibbous, more or less compressed at three sides; anterior ex- 
tremity acute; posterior obtuse and rounded. Chambers few, u, inflated. Sutures 
depressed. Surface smooth. Aperture circular, coronate. Length 35 to ys inch. 
In the section referring to Polymorphina lactea (page 215) the relations of P. com- 
munis with that species on the one hand and P. problema on the other are described; and 
but little need be added to what is there stated. A glance at the figures of the three 
forms (Plate XXXIX. figs. 1, 10, & 11) will explain better than words whatever may 
have been left obscure. Prof. Reuss, in his memoir on the Fossil Fauna of Wieliezka, 
has placed P. communis and P. Austriaca in the same group as P. problema,—a course to 
which we only object on the ground of convenience, as may be gathered from our pre- 
vious remarks. 
Some difficulty has been experienced in determining the place of P. glomerata of 
Roemer and Reuss. The figures given by both authors are too small to be of much 
service; but they appear to represent a short, wide, few-chambered variety, such as would 
find its nearest allies amongst specimens of P. communis ; and possibly GI. bulloides may 
also be included in the group for similar reasons. D’Orbigny’s Gutt. irregularis is a 
thinner, outspread form, partaking of the same characters; and Egger's Gutt. lata is 
almost circular in its lateral aspect, notwithstanding a somewhat irregular septation. 
Gutt. semiplana has a plano-convex transverse section, and may be a transition variety 
between’ the present species and P. Burdigalensis. The remaining references in our list 
answer to the characters of the subtype as laid down above. 
Distribution.—In distribution P. communis has much the same range as P. lactea. It 
appears in the Chalk of Northern Germany and Bohemia and in the Lower Tertiaries of 
Central Europe, in the Miocene of the Vienna Basin and Lower Bavaria, and in the Crag 
of Suffolk. The New-Zealand Tertiary formations also yield specimens referable to this 
species. It occurs too in the Glacial (Posttertiary) clays of Seotland and Norway. 
. Recent specimens are found in sea-sands from the littoral, laminarian, coralline, and 
coral zones in every latitude. 
POLYMORPHINA PROBLEMA, D'Orbigny. (Plate XXXIX. figs. 11. a, b.) 
Polymorphina (Guttulina) problema, d'Orbigny, 1826, Ann. Sc. Nat. vol. vii. p. 266, No. 14; Modèle 
no, 61. 
