REPORT ON THE POLYZOA. 
205 
(30) Cellepora granum, Hincks (PI. XXXVI. fig. 10) (chitinous parts). 
Cellepora granum, Hincks, Ann. and Mag. Nat. Hist., ser 5, vol. viii. p. 68, pi. iii. fig. 8, 1881. 
Character. — Zooecia ovoicl, smooth, distant. Orifice suborbicular with a pointed 
sinus ; peristome raised all round and produced in front into a median rostrum 
supporting an avicularium on its inner face. Ooecia globose, smooth, with semicircular 
perforated area in front. A few interspersed retentive avicularia, with a broad, spatulate 
and cucullate mandible. 
Habitat. — Station 162, off East Moncceur Island, Bass Strait, 38 fathoms, sand and 
shells. 
[Off Curtis Island, abundant, Hincks. J 
Only one or two small specimens, in poor condition, occur in the collection, but 
sufficient to show that in all probability they represent Mr. Hincks’ form, in whose 
figure the peculiar position of the ooecium is well shown. 
(31) Cellepora tubulosa, Hincks (sp. V). 
Celleporci costazii, var. a, tubulosa, Hincks, Brit. Mar. Polyz., vol. i. p. 411, pi. lv. fig. 13. 
Character. — Zoarium globose ; zooecia of two forms, one ventricose, immersed below, 
primary orifice pyriform, peristome thin, even with the surface ; the other having the 
peristome much produced and tubular, a cylindrical hollow process on each side which 
supports at the apex a small avicularium, with an acutely pointed mandible. Secondary 
orifice large, subquadrangular, the border undulated, one face of the tubular process 
hollowed, the other rounded. Ooecia recumbent, with a circular finely punctate area on 
the upper face, placed near the base of the tubular process on the 
hinder (?) aspect, and above it usually a large triangular opening. 
Surface generally smooth and entire. Operculum pyriform, 
pointed below, with an even margin ; avicularian mandible sub- 
acicular or acuminate. 
Habitat. — Stations 135a and c, Nightingale and Inaccessible 
Islands, Tristan da Cunha, 75 and 110 fathoms. 
Though it is by no means certain that the form here described 
is identical with Mr. Hincks’ var. a of Cellepora costazii seu 
hassallii ; there can be no doubt that the two are very closely 
allied, nor that they stand in close relation to the form figured 
by Savigny (Egypte, pi. vii. fig. 4), whether that be identical with the British Cellepora 
hassallii, as Mr. Hincks supposes, or not. At the same time it is quite clear that 
Cellepora tubulosa is distinct from the typical Cellepora hassallii, with which I have 
carefully compared it. 
Fig. 59. — A. Operculum and 
mandible of Cellepora has- 
sallii. B. Operculum and 
mandible of Cellepora tubu- 
losa. 
