416 MR. A. W. WATERS ON THE RELATIONSHIPS 



The primary zooecium is surrounded by five secondary zooecia, and there 

 are three vibracula, so that we get eight chambers, which is the number of 

 surrounding zooecia in so many of the group, that it seems almost general. 

 The earlier vibracula are much smaller than the later ones, which are also 

 relatively much wider. 



MacGillivray expresses some doubt as to whether ihe specimens which I 

 described were the species of T. Woods, who described the avicularian 

 chamber as having the edges studded with very fine teeth. 1 concluded that 

 Woods' 1 specimens had the front broken down, when instead of the pores 

 described bj T me we have irregular teeth. It does not seem that there can be 

 any doubt as to the recent and fossil forms being the same species. 



The opesia are much larger than the operculum, except in the central 

 zooecia, where the operculum is the same size as the calcareous opening. In 

 Lunulites the opening is similarly opesial. 



Loc. Off Port Stephens, New South Wales, 25 fath. 



Fossil. Muddy Creek, Grellibrand, and Lake Bullenmerri, Victoria (MacG.). 



Selenaria punctata, Tenison Woods. (PI. 29. fig. 7.) 



Selenaria punctata, T. Woods, Trans. Phil, Soc. Adelaide, vol. iii. p. 9, p], 2. fig. 8(1880 

 Waters, " N. S. Wales," p. 201 (1837) ; Maplestone, Proc. Boy. Soc. Victoria, n.s. vol. xvi. 

 p. 208, and described again on p. 212, pi. 24. fig. 2 (1904). 



S.fenestrata, Haswell, Proc. Linn. Soc. N.S.W. vol. v. p. 42 (1880). 



My recent specimens from Port Stephens and from Princess Charlotte 

 Bay, N.E. Australia, are a trifle larger than the measurements given by 

 Maplestone, the zooecia being 0'23 mm. wide and long. I* called a fossil 

 from Muddy Creek punctata, though mentioning the size of the aperture as 

 021 mm., whereas in the recent form it is only about 0'09-0 - 14 mm. Later 

 MacGillivray f placed the fossil as T. punctata and called attention to the 

 large size of the zooecia. 



Maplestone % would call the fossil 8. magnipunctata, though it is an open 

 question as to whether the mere difference in size between a tertiary fossil 

 and recent forms is sufficient to necessitate a new species. However, in 

 1887 I was describing recent forms which are S. punctata, and therefore 

 Maplestone has made a slip in placing these under the synonyms of magni- 

 punctata. The S.fenestrata, Hasw., presented by the Australian Museum to 

 the British Museum, is the magnipunctata of Maplestone. 



Loc. Off Cape Three Points (Woods) ; Holborn Island (HasweU) ; Princess 

 Charlotte Bay, Port Stephens, N.S.W. ; Port Jackson. 



* Quart. Joui'u. Geol. Soc. vol. xxxix. p. 440 (1883). 

 t " Tart. Poly. Victoria," p. 47, pi. 7. figs. 8, 9 (1895). 

 % "Vict. foss. Selenar." p. 212, pi. 24. fig. 2 (,1009). 



