Natural History of East Finmark. 95 
opening and leaving at the sides behind large lateral fora- 
mina,d. The foramen c is ordinarily so much overhung by the 
arch formed by the upper portions of the forked bars a that 
it is hidden when the zocecium is viewed from the front (see 
the figure of Smitt), but, so far as my observations go, it is 
never closed ; and doubtless serves some special function. 
Punctata.—The lacunes are ordinarily unusually large, and 
they are all lateral lacunes: for median lacunes are rarely 
present, the median line being occupied by a ridge running 
down the centre of the zocecium and developed on the distal 
meeting-line of the bars. The lumen seems always to have 
a pore of somewhat larger size than usual just beyond the 
expansion in breadth in the loop; and sometimes a second 
minute pore much further in. Sometimes the lumen-line is 
occupied by an elevated ridge (see Hincks, pl. xxvi. fig. 4), 
and these bar-ridges unite with the central longitudinal ridge 
as in Hincks’s figure, but in other cases they die out before 
they reach that ridge. One pair of bars takes part in the 
formation of the lower lip, and while its hinder margin con- 
tributes its share to the formation of the foremost row of 
lacunes, its front margin constitutes the lower lip, and the 
lumen-line is usually raised in the form of a rib; the inner 
front corners of the bars are either cemented together and 
produce a simple rostrum, or they remain ununited at the 
tips and constitute a bifid rostrum; both these forms of the 
rostrum are shown in Hincks’s pl. xxvi. fig. 1. In this species 
the ocecium is globose and somewhat elongated ; it remains 
permanently exposed, but is subject to nodulous outgrowths, 
and frequently bears an avicularium on its summit (see 
Hincks, pl. xxvi. fig. 4). Ihave in my collection an interesting 
specimen in which many of the zocecia, as well as the tuber- 
culated ocecium with its avicularium, closely agree with the 
figure just referred to with the following important additions : 
there is a pair of lateral oral avicularia the direction of which 
is perfectly horizontal and the raised ]umen-rib has at its 
base a large pore (as in Cribrilina hippocrepis, Hincks, 
‘© Polyzoa Queen Charlotte Islands,” Ann. & Mag. Nat. Hist. 
ser. 5, vol. x. 1882, pl. xx. fig. 6) and often a second more 
distal smaller pore ; in some zoccia there is only one lateral 
lacune (as in the figure of Hincks, Brit. Pol. pl. xxvi. fig. 4), 
but in other zocecia there are two. 
Cryptoecium, sp. n. (Pl. IX. figs. 1, 2).—The building up 
of the zocecium is of the same character asin punctata. There 
are usually not more than four large lacunes on the whole 
breadth of the zocecium, nor more than five bars on a side; 
