REPORT ON THE POLYZOA. 
201 
ridiate, peristome thin. In the older zooecia a small tubercular pre-oral process, having- 
on one side a minute avicularium, with a subtriangular mandible. In the older portions 
the individual zooecia are for the most part obliterated, and in these parts of the zoarium 
the surface presents small pustular, subhexagonal eminences, each of which has a minute 
avicularium in the centre. Besides these there are a few interspersed retentive avicularia 
with a spatulate mandible, with a very contracted base. 
Habitat. — Station 167, lat, 39° 32' S., long. 171° 48' E., 150 fathoms, blue mud. 
Off Marion Island, 50 to 75 fathoms. 
(20) Cellepora cylindriformis, n. sp. (PI. XXX. fig. 9, and PI. XXXVI. fig. 9). 
Character. — Zoarium conical or tapering. Zooecia large, distinct. Orifice (fig. 9a) 
orbicular, widely emarginate. A strong, incurved, cylindrical pre-oral process, support- 
ing a large avicularium (fig. 9a), with a broad, equilateral triangular mandible. 
Interspersed avicularia (fig. 96) not numerous, having a broad, short, membranous 
mandible, either of a duck-bill form or squarely truncate. Ooecia (fig. 9a) small, erect, 
globose, punctured. 
Habitat. — Station 142, lat. 35° 4' S., long. 18° 37' E., 150 fathoms, sand. 
The only specimen is of a cylindrical form about 0'75 inch long, by 0T in diameter, 
appearing, but not certainly, to be moulded on a worm tube. 
(21) Cellepora eatonensis, n. sp. (PI. XXIX. figs. 4, 6, 8, and PI. XXXVI. figs. 3, 4, 5). 
Character. — Zoarium multiform, massive, or branched ; the branches short, thick, and 
obtuse, or more or less lamellar, and free ; or incrusting, or parasitic, and more or less 
globose. Zooecia (young) barrel-shaped, (fig. 4), afterwards ventricose ; surface entire, 
smooth. Orifice subarcuate, with a wide notch. Pre-oral rostrum very variable in size 
and conformation ; small and conical, or very large and cylindrical towards the end, and 
deeply channelled on the posterior aspect, but always hollow (fig. 8 6), supporting near 
the extremity a small avicularium, with a semicircular mandible. Numerous very large 
interspersed avicularia, with a duck-bill shaped mandible, shutting down into a deep 
cupped beak, the end of which is gouge shaped, and the border entire and sharp. 
Habitat. — Station 149 d, RoyalSound, Kerguelen, 28 fathoms. Stations 149 h, j, k, 
off Christmas Harbour, Kerguelen, 45 to 127 fathoms. Station 303, lat. 45° 31' S., long. 
78° 9' W., 1325 fathoms, Globigerina ooze. Station 315, lat. 51° 40' S., long. 57° 50' W., 
5 to 12 fathoms, sand. 
Though exhibiting considerable diversity, especially in the greater or less development 
of the rostrum, the specimens from the above localities agree in all essential particulars, 
(ZOOL. CHALL. EXP. PART XXX. 1884.) Gg 26 
