REPORT ON THE FORAMINIFERA. 
55 7 
Sub-family 3. Polymorphininse. 
Polymorphina, d’Orbigny. 
Polymorphium , Soldani [1781]. 
Serpula, Walker [1784], Kanmaclier. 
Vermiculum, Montagu [1803], Fleming, Macgillivray. 
Arethusa , Montfort [1808], Bowditch, Fleming, Thorpe. 
Misilu-s, Cantharus, Montfort [1808]. 
Polymorphina , d’Orbigny [1826], Ehrenberg, Roemer, Macgillivray, Philippi, Reuss, Parker and 
Jones, Egger, Williamson, Terquem, Karrer, Carpenter, Giimbel, &c. 
Globulina, d’Orbigny [1826], Sander Rang, Roemer, Reuss, Alth, Bornemann, Costa, Egger, 
Karrer, Schwager, Schlicbt, Kubler, &c. 
Guttulina, d’Orbigny [1826], Sander Rang, Roemer, Reuss, Alth, Bornemann, Costa, Egger, 
Karrer, Stacbe, Scblicht, Terquem, &c. 
Pyrulina, d’Orbigny [1826], Sander Rang, Reuss, Morris and Jones, Elirenberg, Scblicht. 
Renoidea, pars, Brown [1827], 
Raphanulina , pars; Apiopterina, pars, Zborzewski [1834]. 
Proroporus, pars, Elirenberg [1844], Reuss. 
Aulostomella, Alth [1850], 
Grammostomum , pars; Bigenerina, pars ; Loxostomum, pars; Elirenberg [1854], 
Pleurites, Ehrenberg [1854], Kubler and Zwingli. 
Onchohotrys 1 Elirenberg [1856]. 
Rostrolina, Atractolina, pars, Schhcht [1869]. 
The genus Polymorphina, as its name implies, embraces a series of Foraminifera 
presenting great diversity of form. The typical shell is rounded and inequilateral in 
contour, its segments are few in number, obliquely set, and arranged in a more or less 
distinctly spiral manner, and the aperture is central and terminal. The various modi- 
fications of the type were arranged by d’Orbigny in four subgeneric groups, with the 
following characters. 1 
I. Polymorphina (proper), having a large number of chambers visible, alternat- 
ing on two sides almost equally. 
II. Guttulina, having but few of the chambers visible, alternating upon three 
faces ; chambers embracing. 
III. Globulina, alternating on three faces, chambers embracing ; three chambers 
only visible. 
IV. Pyrulina, alternation irregular or somewhat obscurely spiral, formed of half- 
embracing chambers. 
It will be seen that, so far as external features are concerned, the foregoing sub- 
division depends on the number of segments in each convolution of the spire, whether 
1 Ann. Sci. Nat., 1826, vol. vii. pp. 265-267. 
(ZOOL. CHALL. EXP. PART XXII. — 1884.) 
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