REPORT ON THE POLYZOA. 
103 
and Lepralia diadema of Mr. Macgillivray is very striking, and such as would almost 
lead to the supposition that the species might be dimorphic. Mr. Macgillivray’s species 
being characterised chiefly by its more highly calcified condition and adnate or decum- 
bent habit, and, what is perhaps of more importance, the existence of several oral spines 
and of one or two avicularia on the front, appendages never seen in Onchopora bombycma. 
The Family here contains the following genera : — 
1. Onchopora, Busk. 
Onchopora sinclairii, Busk (PI. X. fig. 4). 
2. Onchoporella, n. gen. 
Onchoporella bombycina (Brit. Mus. Cat.) 
1. Onchopora. 
Onchopora (pars), Ek., Quart. Journ. Micr. Sci., vol. iii. p. 320. 
Carbasea (pars), Bk., &c. 
Malakosaria, Goldstein, Proc. Roy. Soc. Victoria, June 1881, p. 5, pi. ii. fig. 1. 
Character. — Zoarium dichotomously branched, cylindrical, quadriserial. 
Onchopora sinclairii, Busk (PI. X. fig. 4). 
Onchopora sinclairii, Bk., Quart. Journ. Micr. Sci., vol. v. p. 172, pi. xv. figs. 1, 2, 3. 
Malakosaria pholaramphos, Goldstein, loc. cit. 
Character. — Zooecia ventricose, contracted below, usually (but not always) with an 
obtuse tubercle on each upper angle above the orifice. Lunate pore elongated from side 
to side, and above it two small round pores. Lateral fenestrse oblong, with two apparent 
perforations in each. Ooecium globose, prominent, subumbonate, with lines radiating from 
the centre. 
Habitat. — Station 150, lat. 52° 4' S., long. 71° 22' E., 150 fathoms, coarse gravel. 
Station 151, off Heard Island, 75 fathoms, volcanic mud. Station 157, lat. 53° 55' S., 
long. 108° 35' E., 1950 fathoms, Diatom ooze. Station 149d, Royal Sound, Kerguelen, 
28 fathoms, volcanic mud. 
[New Zealand, Dr. Sinclair; Lyall ; Australia, W. H. Harvey; Marion Islands, 
Voyage of Challenger, Goldstein] 
The specimen from Station 157, 1950 fathoms, it should be observed, was in a much 
injured condition. 
2. Onchoporella, n. gen. 
Carbasea (pars), Gray. 
Scruparia (pars), Busk. 
Character. — Zoarium foliaceous, unilaminar, ligulate or lobed. 
