422 MR. A. W. WATERS ON THE RELATIONSHIPS 



I said that the examination of d'Orbigny's specimens showed that his 

 Flabellopora elegans is not what, I described as Conescharellina elegans, and 

 since then Levinsen has suggested the specific name flabellaris for the latter, 

 and I have adopted it. 



One specimen (fig. 17, loc. cit.) which I floured is quite bilaminate, while 

 others (like figs. 15, 16, I. c.) are much wider, so tbat the section of one 

 specimen is very much like that of angulopora or of conica (PI. 29. fig. 16). 

 The under surface has chambers with a large round pore in the centre and 

 five or six small pores surrounding it, just as in C. angulopora, T. Woods 

 (PI. 29. fig. 21). The avicularia on the upper surface are small and round, 

 whereas in C. angulopora and C. conica they are large and triangular. 



The semilunar slit occurs in various places, but perhaps most often in the 

 region of the apex and the border. The slit is materially wider than the 

 aperture of the ordinary zooecia, which, as I have suggested before, seems 

 to indicate that the slit could not be for the formation of a zooecium or 

 zocecial aperture. In other species there are typically a pair of avicularia 

 by the slit, but there is no rule in this species. 



Loc. Port Stephens, N. S. Wales, 7-8 fath.; Port Jackson (Whitelegge $ 

 Lev.) 



Conescharellina angulopora (Tenison Woods). (PL 29. figs. 6, 19, 21 ; 

 PI. 30. fig. 19.) 



Lunulites angulopora, Woods, "Austr. Selenariadse," vol. iii. p. 7, pi. 1. figs. 3a-3c 

 (1880): Whitelegge, "Austr. Polyzoa," vol. ii. p. 343 (1887). 



Lunulites ineisa, Hincks, Ann. & Mag. Nat. Hist. ser. 5, vol. viii. p. 127, pi. 4. figs, 1-3. 



Conescharellina angulopora, Levinsen, " Morpk. Ckeil." p. 311, pi. 23. figs. 7n-7/(1909). 

 ? Conescharellina depressa, Haswell, "Pol)', from Queensland Coast," Proc. Linn. Soc. 

 N. S. Wales," vol. v. p. 41, pi. 3. fig. 4 (1880). 



There are two very similar species from Australia, but the present one has 

 the larger zoaria with the base of the cone more spread out ; the zocecia and 

 avicularia are also larger, the peristomes at the sides of the oral aperture are 

 more raised, as is also the avicularian chamber and beak. However, the 

 most important character is furnished by the under surface, as the basal wall 

 of the cancelli has a large central perforation with smaller ones round it 

 (fig. 21), as a rule without avicularia, though I saw one case in which there 

 was an avicularian bar to the larger perforation. These perforated walls of 

 the cancelli are mentioned by Tenison AVoods in his angulopora, and by 

 Haswell for his Conescharellina depressa, and although Haswell's figures do 

 not correspond closely with my specimens, there is the probability of both 

 being the same species. The under surface of C. flabellaris, Lev., is quite 

 similar. The semilunar slit is larger than in other species examined, being- 

 wider than the zooecial aperture, which would seem to show that it is not for 

 the formation of a zooecial aperture; the slit may occur either in the row 



