54 MR. A. W. WATERS ON 
Jackson-Harmsworth Exp.: off Northbrook Island, 2-3 
fath.; off Cape Gertrude, 30 fath. 
6. Bueuta HarMsworruit, sp. nov. (PI. 7. fig. 12, Pl. 8. fig. 1.) 
The three lower zocecia retain the primary character and are 
elongate, tubular, slightly trumpet-shaped, expanding upwards ; 
aperture terminal with ten spines round the margin, two radicles 
arising from near to the base. The mature zoccia are biserial, 
have two spines at each corner, an area covering about two-thirds 
of the front of the zoccium, and a large avicularium placed a 
little more than a quarter of the length of the zocecium from the 
top. Ovicell unknown. 
This was at first taken for B. avicularia, L., but differs in having 
four spines, the area is shorter, the avicularia are somewhat 
longer, and the primary zoccia are not the same. Unfortunately 
there was only one piece, so that it was not advisable to cut any 
sections. 
Lorenz gives B. avicularia, L., from Jan Mayen. 
Loc. From off Cape Mary Harmsworth, 53-93 fath. 
7. SCRUPOCELLARIA scABRA (Van Ben.). (Pl. 7. figs. 14-16.) 
Cellarina seabra, Van Beneden, Bull. Acad. Roy. de Belgique, vol. xv. 
pt. i. p. 73, figs. 8-6 (1848). 
Scrupocellaria Delilit, Alder, On New Brit. Polyzoa, Micr. Journ. n. s. 
vol, iv. p. 107 (18), pl. iv. figs. 4-8. 
Cellularta scabra, Smitt, “ Krit. Fort.” 1867, pp. 283 & 314, pl. xvii. 
figs. 27-34. 
Scrupocellaria scabra, Norman, Q. Journ. Micr. Se. n. s. vol. viii. p. 214 
(3); Hincks, Brit. Mar. Polyz. p. 48, pl. vi. figs. 7-11; id. Ann. Mag. 
Nat. Hist. ser. 6, vol. iii. p. 427, pl. xxi. fig. 1. 
All the Arctic specimens now examined have a very large 
scutum, resembling in this respect the form described by Hincks 
from Gaspé Bay (St. Lawrence), and which he says also occurs in 
Greenland, and it might be an advantage to separate them as a 
variety from the British forms. There are usually two spines to 
each zocecium, but occasionally three, and three spines to the 
zocecium at the bifurcation, and there sometimes is one vibra- 
culum on the dorsal surface at the bifurcation. This is, however, 
often wanting; so that both Levinsen and I have referred to 
S. scabra as without any vibraculum at the bifurcation. In the 
same way, the large dorsal vibracula are frequently altogether 
wanting, so that whole colonies may be described as without 
