BRYOZOA 



97 



L. echinata MacG.; L. fimbriata B. ; L. truicntata Haswell ; L. Wilsoni MacG. In what is 

 perhaps the commonest species, and should be called L. echinata the ovicell is an inflation of the 

 central portion, in which there are numerous fairly small perforations, and in the older parts 

 small ridges formed by minute trabeculse, not distinguishable when but slightly magnified 

 (see Linn. Soc. Journ. ZooL, vol. XX, pi. XV, fig. 3). This occurs from Victoria and Tristan 

 d'Acunha. In L. canaliadata the ovicell also covers the central portion, without spreading within 

 the arms, but a coarse network is formed by large trabeculse similar to those shown in 

 L. victoriensis (loc. cit., pi. XV, fig. 4) and the walls within the network are perforated b}- pores 

 (see Ami. Mag. Nat. Hist., s. 5, vol. XX, pi. VII, fig. 4). This occurs from Kerguelen, Victoria, 

 and New South Wales. The basai wall of the ovicell, is in Lichenopora usually formed by 

 a large network closed by a perîorated layer, as shown at the left hand side of my figure 3, 

 pi. XV, loc. cit. 



Besides the above mentioned Lichenoporœ, common southern species are L. Holdsworihii 

 Busk, from Victoria, N. S. Wales, S. Africa, Ceylon, Tahiti ; L. neozelandiœ Busk, New 

 Zealand, Australia; L. californica (d'Orb.-Busk), New Zealand, Australia, California. 



The form of ovicell, which I figured (Ann. Mag. Nat. Hist., s. 5, vol. XX, pi. VII, 

 fig. 5) is peculiar, and having only seen the one spécimen it is doubtful whether it should 

 be placed under L. ciliata B. 



In the Antarctic spécimen N° 5g6 there is an inflation near the summit of the cône, 

 which is no doubt the ovicell, and a round opening without a tube is the opening of the oviduct. 

 There are between the zoœcia a few distant pores smaller than the zoœcial tubes. 



Jullikn makes even a new family Galeidœ, for Lichenopora in which the zoœcial tubes are 

 prolonged « sur une partie seulement de leur orifice », but his description is rather puzzling, 

 as he then says « soit entière soit découpée », but the zoœcial tube varies so much in différent 

 parts of the same colony, that we cannot always use the shape of the projecting portion, even 

 as a generic character, and the family Galeidœ is superfluous. 



Habitat. — Off Chili, i3 and 96 fathoms (21 and i55 met.); Tierra del Fuego ; Cape 

 Horn 40 fath. (65 met.) ; Tasmania (B.) ; Kerguelen (B.) ; Tristan d'Acunha 100-1D0 fath. 

 (160-245 met.) (B.) ; Victoria (MacG.). 



Exp. Antarct. Belge. 



N° 596, Tangles VII. Lat. 70 23' S.- Long. 82°47' W.; 480 met.; 4-0.8 C. 



Lichenopora octoradiata sp. nov. 



(PI. IX, figs. ga-d) 



The zoarium is very solid and much raised, with the base narrower than the disk. 

 There are a number of biserial rays, formed by a few zoœcia, and in a well developed spéci- 

 men there are eight main rays, with indications of the commencement of another séries. The 

 rays do not extend to the border ofthe zoarium, nor are the zoœcia round the border of the 

 disk elevated, while in the centre ofthe zoarium the openings are round and vary in size. 



This has many ofthe characters of Defranceia d'Orb., but with the limited and somewhat 

 worn spécimens, it is difficult to décide upon the generic position. 



xiii R 21 



