692 A. W. WATERS ON FOSSIL CYCLOSTOMATOUS 
of colonies occur with biserial rows. This is extremely important 
in helping us to appreciate the classificatory importance of this 
character. 
If, however, all these are to be called Tubulipora, it would 
become a most unwieldy genus, certainly with intermediate forms, 
but many, seen apart, would, at first sight, seem widely divergent. 
Although it may be only an arbitrary division, it will, I think, assist 
us in study if we for the present confine Tubulipora to those species 
only in which the end of the zocecial tube is free, and in which there 
is no symmetrical arrangement. 
22, PAVOTUBIGERA GAMBIERENSIS, noy. sp. Pl. XXX. fig. 9. 
Zoarium apparently adnate. Zocecia in bundles of two or more, 
erect, connate ; ovicell an inflation of a portion of the surface between 
the zocecia : surface of zocecia evidently finely punctate. 
23. DEFRANCIA EXALTATA, noy. sp. Pl. XXXI. fig. 23. 
Zoarium incrusting, oval, with the rays rising from near the 
centre, and sometimes dividing, and much raised round the border ; 
rays multiserial, large pores round the base of the rays. 
This, like most of the Mt. Gambier fossils, is but badly preserved, 
and therefore it is impossible to feel quite sure about the determina- 
tion, but it seems to be the same as an undescribed species from the 
Bay of Naples, which, however, may be the D. verrucaria of Heller 
(non Fabr. or M.-Edw.). In the Naples specimen an inflation of one 
half of the central portion forms the ovicell, and the ovicellular open- © 
ing is tubular, alittle larger than a zocecial tube, and occurs between 
the base of two rays. . 
This is related to the Defrancia diadema, Goldf., Hag., and d’Orb. 
I have also a colony from the Miocene of Brendola colle Berici, N. 
Italy, which has eight rays which do not divide. In Tubulipora 
Brongniarti (Manzoni, Mioc. Austr. ed Ungh. pl. xviii. fig. 73) there 
are more rays, and these are figured as starting from the centre of 
the colony. 
24, Supercytis? pierrata, @Orb, Pl. XXXII. figs. 22, 26, 27. 
Supercytis digitata, 7 Orb. Pal. Frang. p. 1061, pl. 798. figs. 6-9. 
Zoarium stipitate, fasciculi bifurcated, starting from the base, 
laterally compressed, the upper surface forming a horizontal plane. 
The fasciculi consist of a number of parallel zocecia, usually three 
or four side by side, directed obliquely upwards so that the openings 
of these tubes are seen all along the fasciculi. The central portion 
of what must be called the capitulum is flat and covered with a 
finely perforated calcareous wall, out of which rise the ends of the 
central zocecia slightly exserted, giving this portion the appearance 
of a Diastopora, such as D. sarniensis. Central zocecia 0-1 millim. 
in diameter. Zoarium about 11 millim. in the longer diameter, and 
about 7 millim. in the shorter. 
This is very closely allied to Pelagia insignis, Michelin, from the 
grés verts of Mans, and possibly may be identical. 
