OF THE SELENAKIAD/E, CONESCHARELLINID.E, ETC. 421 



under surface, and typically there is one on each side of the zooecium, and 

 one below the aperture. 



On the under side of the zoarium there are a number of chambers (PI. 29. 

 fig. 11), the youngest ones being avicularian. These chambers, apparently, 

 must be compared with those of Cupularia canariensis, and are found in 

 Conescharellina philippinensis, C. angulopora, C. cancellata, C. flabellaris, 

 C. cornea. Whitelegge speaks (loc. cit. p. 431) of the zocecia taking their 

 origin from the cancellated structure, but it is now clear that the zooecia 

 grow first, and from them the cancellated structure. 



The semilunar slit to which "Whitelegge called attention, and which 

 Maplestone has also studied, occurs in this species. These semilunar slits 

 have not a definite position in relation to the zocecia, being most abundant 

 near the apex of the zoarium, and sometimes several are found in the same 

 circle somewhere near the apex, others in a circle half-way between this and 

 the periphery, thus there is considerable irregularity and variation. 



In some Conescharellinre there seem to have been radicles from near the 

 apex, where there is a considerable calcareous cap with pores (PI. 29. fig. 16), 

 but this is not the case in C. philippinensis, in which there is no such calcareous 

 growth, but on p. 405 it is suggested that radicles grew from the semilunar 

 slits, and I expect with living or spirit specimens we shall see confirmation 

 of deductions made from dried specimens. However, I have found no indica- 

 tions suggesting radicles, except in Conescharellina, and perhaps Batopora. 



In the young philippinensis the under surface is flat or slightly concave, 

 whereas in older ones the under surface is concave. The younger zocecia are 

 very much smaller than the older ones, and the secondary apertures are also 

 smaller. A figure (PI. 30. fig. 24) of a very young zoarium is added, as it 

 shows the small size of the zocecia, and also the typical position of the 

 avicularia at each side of the zocecia, which is not so easily seen in more 

 mature forms, as the avicularia are then more irregularly placed. 



The raised and globular ovicell, described by Whitelegge and figured by 

 Maplestone, is directed towards the apex. A specimen with ovicells was 

 given to me by Maplestone, but altogether only very few have been seen. 



Loc. Philippine Islands (Busk) ; Katovv, New Guinea, 7 fath. ; Darnley 

 Island, Torres Straits, 10-30 fath. ; Princess Charlotte Bay, N.E. Australia, 

 13 fath. ; Port Stephens "from weeds on sandy bottom," dredged by Brazier; 

 Moreton Bay, N.E. Australia (Whitelegge in lit.) ; Port Jackson. 



Fossil. Curdies Creek, S.W. Australia ; Schnapper Point (MacG.). 



CONESCHARELLINA FLABELLARIS, Levinsen. 



Conescharellina flabellaris, Levinsen, "Morph. Cbeil. Bry." p. 312 (1909). 

 Conescharellina elegans, Waters, "N. S. "Wales," p. 200, pi. 5. figs. 13-17 (1887). 

 Bipora (?) elegans, Whitelegge, " Austr. Polyzoa," vol. ii. p. 346 (1887). 



In my "Notes on some Recent Bryozoa in d'Orbigny's Collection,"* 

 * Ann. Mag. Nat. Hist. ser. 7, vol. xv. p. 3, pi. i. fig. 5 (1905). 



