REPORT ON THE POLYZOA. 
33 
The digitiform process, which forms such a striking character in this species, is repre- 
sented in Bicellaria tuba (Brit. Mus. Cat., p. 42, pi. xxxi.) by a smaller process of the 
same kind. It is a simple continuation of the zooecial cavity, and the secondary spines 
arising from it are articulated at the base. The most marked peculiarity in Bicellaria 
navicularis is the small funnel-shaped avicularium placed in front of the lower edge of the 
aperture ; not unfrequently there is also a second avicularium of the same kind in front 
of the upper edge of the aperture. A specimen from 400 fathoms, prepared by Mr. 
Moseley, has the zocecia of much larger size than the others. 
(2) Bicellaria pectogemma, Goldstein (PI. VII. fig. 1). 
Bicellaria pectogemma, Goldst., Proc. Roy. Soc. Viet., June 9, 1881, p. 4, pi. i. figs. 2-2 a. 
Character. — Aperture oval, with a much raised, thin, spatulate margin. Zooecium 
attenuated into a very long slender tube. A series of four to six long, curved, very 
slender spines rising from the back and outer side of the zooecium, and a small dorsal 
spine near the rachis. Ooecium large, rounded, quite recumbent, placed at the outer end 
of the aperture. Avicularia very various in size, but all long, trumpet-shaped, arising 
from the back of the zooecia. 
Habitat. — Station 145, lat. 46° 48' S., long 37° 49' E., 150 to 310 fathoms. Station 150, 
lat. 52° 4' S., long. 71° 22 ' E., 150 fathoms, coarse gravel. Station 151, off Heard 
Island, 7 5 fathoms, volcanic mud. 
At first sight resembling Bicellaria tuba, Brit. Mus. Cat., p. 42, pi. xxxi., Bicellaria 
pectogemma differs in the more elongated form of the aperture and the absence of the short, 
digitiform, spiniferous process possessed by the former. The avicularia are alike in both. 
It should be remarked that the specimens from the two latter localities given above, and 
from shallower water, are considerably smaller than those from Station 145. 
(3) Bicellaria infundibulata, n. sp. (PI. VI. fig. 2). 
Character. — Zooecia infundibuliform. Aperture rounded, expanding outwards ; outer 
border obtusely angular and arched in the middle; one to three long, slender, articulated 
spines above or behind the aperture (sometimes absent) ; a minute dorsal spine near the 
rachis. Ooecia globose, recumbent, placed beyond the aperture of special zooecia, which 
arise by a long tubular prolongation from the back of one of the others, from the same 
spot from which the avicularia spring, and which may doubtless be a modification of the 
same process. Avicularia of two kinds : one (rare) long, slender, trumpet-shaped, the 
other capitate, shortly pedunculate ; both articulated on the dorsum of a zooecium. 
(ZOOL. CHALL. EXP. PAP.T XXX. 1884.) Gg 5 
