Natural FTistory of East Finmark. 103 
The very different characters of the occium and the 
remarkable overgrowth are the most prominent of the dis- 
tinguishing characters of this species, when compared with 
C. punctata, with which it has hitherto been confused. It 
is of much more vigorous growth than C. punctata; zoaria 
usually exceeding half an inch in diameter and in some 
cases one inch. It would seem to be essentially a littoral 
form. In East Finmark I found it between tide-marks, at 
Vads6 on stones and on the shell of Buccinum grenlandicum, 
var. nuda, Norman; and it is no doubt this form which 
Nordgaard has recorded as C. punctata from Nordkyn. I 
have the species also from Guernsey (tide-marks) ; Birtur- 
buy Bay, Ireland (tide-marks), Hebrides and Shetland (both 
tide-marks) ; Bergen Fiord, Norway, 1878, and neler 
Lofoten Islands, 1890. 
41. Cribrilina annulata (Fabricius). (Pl. VIII. fig. 10.) 
Mehavn, East Finmark (Nordgaard). 
Figures 8 and 9 of Smitt represent a simple form of this 
species ; although not so primitive a variety as that of which 
I have represented some bars. The labial mucro is some- 
times present, sometimes absent; when it is present it 
appears, usually at any rate, to be the termination of a 
central longitudinal keel of the zocecium, which keel may be 
entirely absent or more or less prominent. Smitt figures 
only a pair of lateral oral spimes, but besides these there are 
ordinarily one or two distal spines (see Hincks, pl. xxxv. 
fig. 11) ; the lateral lumen-ribs are either well pronounced, 
as in the figure just referred to, or very conspicuous, as in 
Hincks’s fig. 12. I have not seen any specimen in which 
they are so few in number, so strongly developed, and all 
converging forwards as in Smitt’s fig. 10. The ordinary 
ocecium is represented in Hincks’s fig. 12, having the lateral 
spines uniting and forming an arch in front of the ocecium, 
but these spmes are often taken up by and built more 
completely into the frontal wall of the ocecium. 
Var. spitsbergensis, nom. nov. (PI, VIII. fig. 11.) 
1900. Cribriina annulata, Waters, “ Bryozoa Franz-Josef Land,” 
Journ, Linn. Soc., Zool. vol. xxvii. p. 64, pl. viii. fig. 21, 
The form which Waters has figured in the paper quoted 
above as occurring in Franz-Josef Land is a very marked 
one, and worthy of a distinctive name. The zoccia are 
about double the usual size, rather flat, without central 
keel ; the series of riblets and pores cight or nine; the oral 
