REPORT ON THE POLYZOA. 
13 
(7) Catenicella umbonata, Busk, var. (pi. i. % i). 
Catenicella umbonata, Bk., Brit. Mus. Cat., voL i. p. 11, pi. x. figs. 4, 5 ; Voy. of Rattles., vol. i. 
p. 362. 
Character. — Zocecia pyriform, contracted below, bulging or ventricose above. 
Lateral processes reduced to the avicularian loculus, which is large and strong, usually 
with a perforated border above (probably representing the superior loculus). Vittae long 
and narrow, extending from the level of the mouth to the bottom of the zooecium, 
usually furnished with acuminate papillae. A broad compressed projecting process on 
the middle of the back. 
Habitat. — Station 163b, off Port Jackson, 35 fathoms, hard ground. 
[Bass Strait, 45 fathoms, Voy. of Rattles.; Tasmania, Mrs. Smith.] 
The variety in the Challenger collection differs from the typical form in its great 
delicacy of structure, and the only occasional presence of the dorsal prominence. Nor 
does it show any papillary processes or vittae, on the front. 
(8) Catenicella pulchella, Maplestone (PI. I. fig. 4). 
Catenicella pulchella, Maplest., Joum. Micr. Soc. Victoria, vol. i. (1880), p. 64, pi. v. fig. 4. 
Character. — Zocecia flattened in front, convex behind, ovate in outline, surface quite 
smooth. Orifice semicircular, lower lip emarginate. A row of large circular raised spots 
on each side. Lateral processes short and thick, subconical, with a perforation at the 
base (seen on the side). 
Habitat. — Station 163b, off Port Jackson, 35 fathoms, hard ground. 
[Australia, Maplestone.] 
“ An interesting form” as Mr. Maplestone remarks, and at first sight scarcely referrible 
to either the fenestrate or vittate section. But it appears properly to belong to the 
latter. The lateral series of elevated discoid spots may be regarded as homologous with 
the vittae, and as in the other Vittatce, the ooecia are not terminal, but as Mr. Maplestone 
says “ geminate and not terminal.” 
The lateral spots are completely covered with a sort of convex lid, and have the 
aspect of pustulose elevations. 
Catenicella pulchella differs from Catenicella rufa in its white colour and the absence 
of puncta all over the front, as well as in the absence of the peculiar dorsal stigmata 
which exist in the latter species. 
