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leaving a fissure between their rounded and expanded ends. Orifice semicircular 
or subcrescentic, with a straight entire lower lip ; peristome very slightly thickened, 
entire, even. The front of the zocecia within the border formed of eight transverse, 
confluent costae ; the intercostal sulci with several minute pores and a large one at the 
outer end. No mesial line or fissure. Below the apex of each zooecium is a large 
suborbicular opening, probably avicularian or vibracular. Ooecia inapparent. 
Habitat. — Station 320, lat. 37° 17' S., long. 53° 52' W. ; 600 fathoms, hard ground 
(on dead coral). 
Reuss (Palaontologische Studien uber die alteren Tertiarschichten der Alpen, p. 80, 
PI. XXX. fig. 9), describes and figures under the name Celleporaria radiata a form, in 
some respects closely resembling Cribrilina latimarginata so far as the zooecia / are 
concerned. The sculpture of the front appears to be precisely the same, and there is also 
a large opening below each zooecium. The differences, however, in other respects appear 
to be too great to allow of the supposition that the species are identical. According to 
Reuss, Celleporaria radiata consists of ascending irregularly branched stems, composed 
of concentric layers of cells ; and the interzocecial spaces, instead of being occupied by 
a broad solid band, present a series of very irregular, angular, unequal pores or cancelli, 
which sometimes attain a considerable size. 
§§ 2. Free ; erect or decumbent ( hemescharan ). 
(3) Cribrilina philomela, n. sp. (PI. XVII. fig. 6). 
(?) Cribrilina speciosa, Hincks, Ann. and Mag. Nat. Hist., ser. 5, vol. viii. p. 8, pi. i. fig. 8, 1881. 
(?) Reptescliarella incequalis, d’Orbigny, Palgeont. Frang., p. 467, pi. 716, figs. 1-3. 
Character. — Habit hemescharan ; zocecia oval, separated by deep sulci. Front rather 
flattened, with 7 to 8 shallow transverse fissures on each side, finely perforated ; no sub- 
oral pore. Mouth large, semicircular or slightly coarctate, with a straight entire lower 
lip. Peristome thin and sharp. Occasionally minute erect tubuli occur in the inter- 
zocecial sulci. Ooecia lofty, prominent, globose, slightly keeled in front, with a pyriform 
or crescentic stigma on each side ; posterior wall of zocecia entire, convex, very delicate. 
Habitat. — Off Marion Island, 50 to 75 fathoms. 
Var. a. adnata (PI. XXII. fig. 7). 
(?) Cribrilina fiqularis, var. 
Character. — Closely aclnate (lepralian). Occasionally a large spatulate vicarious 
avicularium. Zocecia distant. 
Habitat. — Off Marion Island, 50 to 75 fathoms (on a species of Myriapora). Station 
151, Heard Island, 75 fathoms. 
[? Curtis Island, Hincks]. 
