EEPOET ON THE POLYZOA. 
189 
(8) Adeonella jpectinata, n. sp. (woodcut 58). 
Character . — Zoarium about 1" high, compressed obscurely carinate, expanding at the 
end, with short lateral branches or lobes. Cells trimorplious ; zooecial, narrow, ovate, 
and separated by shallow sulci. Front convex, and slightly hollowed in the middle with 
wide punctures. Mouth elliptical, transversely elongated, lower lip straight, entire, and 
within it a delicate pectinate denticle extending from side to side. A minute frontal 
avicularium on one side in a few of the zooecia. Sublabial pore of large size. Ooecial 
cells rather larger, orifice arcuate, and in the mature cells with a straight lower border 
and a pectinate internal denticle. Most unarmed, but others have a small avicularium on 
a tubercular elevation on each side of the orifice. In these cells the pore is reniform, 
and placed low down on the front. Avicularian cells all marginal, of large size. 
Mandible of the retentive kind, obtuse, incurved at the point. 
Fig. 58 . — Adeonella pectinata. a , Natural size ; b, zocecia ; c, marginal avicularium ; 
d, mandible. 
Habitat . — Station 186, lat. 10° 30' S., long. 142° 18' E., 8 fathoms, coral mud. 
This is the only species of Adeonella in which I have noticed an internal denticle, by 
the presence of which it may consequently be at once distinguished ; the retentive spatu- 
late marginal avicularia are also distinctive ; in all other cases so far as I know 7 , those organs 
being of the prehensile nature. Unfortunately the collection affords only a single specimen, 
which it is desirable to keep entire, so that I have not attempted to isolate the ehitinous 
parts, and can say nothing of the character of the operculum. The avicularian mandible 
however can be seen without any preparation ; the position of the median pore, low dowm 
on the front of the ooecial cells, is also an exceptional feature. 
