Natural History of East FinmarJc. 103 



The very different characters of the ooecium and the 

 remarkahle overgrowth are the most prominent of the dis- 

 tinguishing characters of this species, M^hen 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 

 Vadso on stones and on the shell of Buccinum gt'cenlandicum, 

 var. nuda, Norman : and it is no doubt this form which 

 Nordgaard has recorded as C. punctata from Nordkyu. 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 Svolvicr, 

 Lofoten Islands, 1890. 



41. Cribrilina annulata (Fabricius). (PI. VIII, fig. 10.) 



]\rehavn. 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; wlien 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 ])rominent. Smitt figures 

 only a pair of lateral oral spines, but besides these there are 

 ordinarily one or two distal spines (see Hincks, pi. 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 

 ooecium is represented in Hincks^s fig. 12, having the lateral 

 spines uniting and forming an arch in front of the ooecium, 

 but these spines are often taken up by and built more 

 completely into the frontal wall of the ooecium. 



Var. spitsberffensis, nom. nov. (PI. VIII. fig. 11.) 



1900. Cribrilina annulata, Waters, " Bryozoa Franz - Josef Land,'' 

 Journ. Linn. Soc, Zool. vol. xxviii. p. 64, pi. viii. iig. 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 zooecia are 

 about double the usual size, rather fiat, without central 

 keel : the series of riblets and pores eight or nine; the oral 



