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ON THE GENUS POLYMORPHINA. 241 
Characters.—Shell ovate, globuline, more or less unsymmetrical. Septa obscure. 
Surface-ornamentation consisting of parallel longitudinal coste, often irregular and 
varying in thickness, but always strong and conspicuous. Orifice circular, coronate, 
sometimes stellate and jagged. Length 3 to 3}; inch. 
We have placed under one name the two costate varieties of Polymorphina figured by 
Dr. Egger, as we do not see how any distinction sufficient for separate definition can be 
drawn between them. We can only speak from analogy based on the information sup- 
plied in Dr. Egger's memoir; but, judging from the habit of allied forms, we cannot think 
that it would be difficult, if a sufficient number of specimens were obtained, to find 
examples in every degree intermediate to the two which he has figured, in such variable 
characters as the contour of the shell and the thickness of the ribs. 
Distribution.— Polymorphina costata is only known as a Miocene fossil In the 
memoir referred to, the localities given are Mairhof, Buchleiten, Hausbach, and Habühl, 
all in Lower Bavaria. Herr Karrer more recently has noted its occurrence in beds of 
similar age at Kostej, in the Banat (Austria), 
POLYMORPHINA REGINA, spec. nov. (Plate XLI. figs. 32, a, à.) 
Characters.—Shell ovate, irregular, obscurely triserial. Anterior extremity acuminate, 
posterior obtuse and rounded. Chambers erect, distinct, inflated, separated by deep 
depressions at the sutures. Orifice circular, pouting. Surface marked by equidistant, 
longitudinal coste. Length 3) inch. 
There is but little danger of confounding Polymorphina regina with any other member 
of the genus, It may be regarded morphologically as P. problema with an ornamenta- 
tion of longitudinal ribs. It differs from P. costata chiefly in general contour, the latter 
having its smooth-shelled analogue in P. gibba, but also to some extent in its more regular 
and definite external markings. 
Distribution.—W e have but three or four specimens of this striking and beautiful lonis 
They were picked out of soundings from Storm "n Tasmania, forwarded to us by the 
late Dr. Greville, of pei | | 
POLYMORPHINA FRONDIFORMIS, Searles Wood. (Plate XLI. figs. 38, a a-c.) 
Polymorphina frondiformis, Searles Wood, 1843, in Morris’s Catalogue of British Fossils, p. 62; Jones, 
Parker, and Brady, 1866, Monogr. Crag Foram., App. I. & 1I. (foot-notes), pl. 1. figs. 62, 63, & 69; 
pl. 4. figs. 11-14. 
Characters.—Shell elongate, compressed or complanate, unsymmetrical. Chambers 
long, fusiform, irregular. Surface depressed over portions of the septal lines; sometimes 
smooth, but more frequently marked by exogenous shelly growths, either in the form of 
circular beads or short, interrupted coste. Length 35 to $ inch. 
Polymorphina frondiformis has perhaps the largest dimensions of any variety of the 
genus hitherto described. It was discovered by Mr. Searles Wood in the Polyzoan débris 
of some of the Suffolk Crag-beds; and a detailed account of it, with figures of several 
