420 MR. A. W. WATERS ON THE RELATIONSHIPS 



lias the base about twice the diameter of C. philippinensis. It has small 

 round or oval avicularin, but the preservation is not very satisfactory. 



The under surface of C. cancellata has some chambers with one large pore 

 in the centre of the basal wall, sometimes surrounded by small pores, as in 

 C. angulopora, Haswell (PI. 29. fig. 21) mid C.flabellaris, Lev., while generally 

 there is the large opening of the chamber and smaller openings round it as 

 in PI. 29. fig. 22. My specimen is from Port Stephens, New South AVales, 

 and,. although the front surface is not very. well preserved, I think it is the 

 same as Busk's large specimen, for which the name can be retained. My 

 specimen is 4 mm. at the base. 



The mistake made, when the type was described, by Busk led me astray 

 when my New South Wales and other specimens were compared in the British 

 Museum, in consequence the specimens then called cancellata by me are seen 

 to be plutippine nsis. 



Lot: Philippine Islands (Busk); Port Stephens, N. S. Wales [A. W. W. 

 coll.). 



Fossil. Bairnsdale, Gippsland. 



CONESCHARELLINA PHILIPPINENSIS (Busk). (PL 29. flgS. 11, 12, lo ; 



PI. 30. fig.* 24.) 



Lunulites philippinensis, Busk, U.M. Cat. pt. ii. p. 101, pi. 113. figs. 1, 2, 3 (1851). 



Bipora philippinerisis, Whitelegge, " Austr. Polyzoa," vol. ii. p. 341 (1887) ; MacGilli- 

 vray, " Tert. Poly, of Vict." p. 8», pi. 12. fig. 2 (1895); Maplestone, " Biporas," ' p. 8 

 (1910) ; Levinsen, Morph. Cheil. Bry. p. 309, pi. 24. fig. 1 (1909). 



Conescharellina cancellata, Waters (pars), "N..S. Wales," p. 200. pi. 4. fig. 24; pi. 6. 

 figs. 13, 18 (1887). 



The comparison of Busk's type-specimens led me astray, on a previous 

 occasion, as he had placed more than one species under L. cancellata, one of 

 these was C. philippinensis, but more preparations and more material of the 

 Selenariadse has enabled me to feel more certain of my position. Unfortu- 

 nately of philippinensis I have only dry specimens, and of all the Selenariadse 

 have only seen the three spirit specimens mentioned. I have a considerable 

 number of philippinensis ranging from very young specimens, from under 

 1 mm. in diameter, up to mature forms nearly 3 mm. The zoarium is usually 

 rather watch-glass shape, that is convex above and concave below, but it 

 may be flat below; in either case there are a number of small raised aviculai ia 

 with a semicircular mandible in the middle of the wall of the avicularian 

 chamber. 



The oral aperture is oval with a sinus in the part nearest to the periphery 

 of zoarium, there is a distinct notch in the secondary aperture of the outer 

 zooecia, and a minute pore by the other end of the oral aperture. Numerous 

 round avicularia occur on the front of the zoarium, similar to those on the 



