JSahivnl ITt'slori/ of East Flnmarl'. f)5 



opening and leaving at the sides behind large lateml fora-t 

 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 zooecium 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 zooecium and developed oii the distal 

 meeting-Hue 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 IJinckSj, pi, 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 rostruni ; both these forms of the 

 rostrum are shown in Hincks's pi. xxvi. fig. 1. In this species 

 the ooecium 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, pi. xxvi. fig. 4) . I have in my collection an interesting 

 specimen in which many of the zocecia, as well as the tuber- 

 culated oqecium with its avicularium, closely agree with the 

 figure just referred to with the following important additions ; 

 there is a pair of lateral oral avieularia the direction of which 

 is perfectly horizontal and the raised lumen-rib has at its 

 base a Urg^ pore (as in Criljrilina hippocrepis, Hincks^ 

 " Polyzoa Queen Charlotte Islands," Ann. & Mag. Nat. Hist, 

 ser. 5, vol. x. 1882, pi. xx. fig, G) and often a second more 

 distal smaller pore ; ni some zooccia there is only one lateral 

 lacune (as in the figure of Hincks, Brit. Pol. pi. xxvi. fig. 4), 

 but in other zooecia there are two. 



Crj/ptooeciim, sp. n. (PI. IX. figs. 1, 2). — The building up 

 of the zooecium is of the same character as in punctata. There 

 are usually not more than four large lacunes on the mIioIc 

 breadth of the zooecium, nor more than five bars on a side ; 



