Batopora and its Allies, 89 
Spherophora fossa, Waswell. 
(Pl. VI. figs. 1-3; text-fig. 2, a.) 
Spherophora fossa, Haswell, ‘ Poly. from Queensland Coast,” Proc. 
Linn. Soc. N.S. Wales, vol. v. p. 42, pl. ii. figs. 5, 6 (1880) 
“Note on a Curious Instance of Symbiosis,” op, cit. vol. vil. p. 608 
(1882). 
Cellepora fossa, Waters, “ Foss, Cheil. Bry. 8. W. Australia,” Quart. 
Journ, Geol. Soe. vol. xxxvii. p. 848, pl. xviii. fig. 89 (1881) ; op. 
ew, vol. xxxvill. p. 275 (1882); op. cit. vol. xxxix. p. 426 (1883) ; 
op. cit. vol. xli. p. 307, fig. 2 (1885); MacGillivray, “ Tert. Poly. of 
Victoria,” Trans. It. Soc. Vict. vol. iv. p. 108, figs. 8, 9, 10 (1895) ; 
Maplestone, “Tab. List Cheil. Poly. in Vict. Tert.,” Proc. R. Soc. 
Vict. vol. xvii, n.s. p. 215 (1904); ‘New or Little-known Poly.,” 
Proc. R. 58. Vict. n. s. vol. xxv. p. 361 (1913). 
? Cellepora tubulosa, Busk. 
On re-examination of the fossil specimen from Curdies 
Creek, I find that the growth commences on the part 
6pposite to the pit, it then grows over to the underside, in 
which the pit is situated, a mode of growth which we have 
seen occurs in Reuss’s Diplotaxis, so that when we are 
lovking at the pit it is at the completion not the beginning 
of the zoarium., A similar pit, though much smaller, has 
been described as the ‘ primordial Zelle? in Butopora and 
other genera (see page 80). 
Haswell deseribed the zoarium as subsperical, slightly 
depressed, with a circular pit at the upper pole, a description 
quite deseribing specimens from Queensland, which he 
kindly sent to me, as one side is somewhat flattened and thie 
pit is at the opposite pole ; but in some fossils * from Bates- 
ford or Muddy Creek the surface with the pit is the flatter, 
showing the zocecia directed to the pit (Pl. VI. fig. 1), and 
these are the best preserved of any specimens, recent or fossil, 
examined by me. In these the pit is 0°55 mm. in diameter, 
and from Perey Island the six specimens have pits 0°8 mm., 
0-6 mm., 0°55 mm. In Batopora multiradiata, Rss., the pits 
are much smaller, being 0°25-0°27 mm. from Ferrara di 
Monte Baldo, Brendola, Montecchio Maggiore, and Val di 
Lonte ; a pit in Orbitulipora petiolus measures 0°36 mm. 
Batopora was described as with a single “‘ aufrecht stehende 
Zelle.” This so-called “ primordial Zelie” also in Sphero- 
phora stands out surrounded by a border, and is much 
larger than any of the zoecial openings, but we must now 
call it a pit and this is referred to on page 80. This reversal 
of the position of the zocecia, though not quite the same as 
now known in Conescharellina, yet reminds us of that genus. 
* “ Foss, Chil. Bry. from Muddy Creel,” Quart. Journ, Geol, Soe, 
yol, xxxix. p. 426 (1883), ' 
