Victorian Fossil Selenariidae. 209 



front of each cell." He gives no figure. T. Woods described 

 this species from a recent form from New South Wales, and he 

 does not record it as fossil. The fossil form described and 

 figured b}' Dr. MacGillivray is a very much larger one, the 

 zooecia being four times as long and four times as broad as that 

 described by T. Woods. I had assumed Dr. MacGillivray's 

 identification to be correct, and I only discovered my mistake 

 upon receiving from Mr. Whitelegge some specimens of the 

 recent form, in answer to my request for some to compare with 

 the fossil, because my specimens were not quite perfect ; the 

 vibracular areas were broken away. The dimensions of the 

 zooecia of the fossil are 0.5 millimetre wide, 0.7 millimetre long ; 

 those of the recent form are 0.15 millimetre wide, 0.17 long, or only 

 about one-sixteenth the size of those of the fossil. T. Woods' figure 

 of S. punctata, though it shows the zooecia upside down, shows 

 that they were very small, and Dr. MacGillivray, in his descrip- 

 tion of the fossil, says that "it differs from S. maculata, to which 

 it is closely allied, in the /a/\^e size of the zooecia and the stellate 

 pores betow the aperture." He must have overlooked the fact 

 that Woods spoke of the small size of the zooecia as compared 

 with those of other species, and Mr. Waters seems to have 

 followed him in his identification, both evidently considering the 

 two pores as being the principal, if not the only, characteristic 

 separating that species from others. Two similar pores occur 

 not only in this species and in the fossil, but also in two other 

 forms which are described in this paper. 



S. marginata, T. Woods. T.R.S. 8. A., 1879, p. 9. 



S. squamosa, McG. T.R.S. V., 1895, p. 48. 



Lunulites initia, Waters, Q.J.G.S., Aug., 1883, p. 4-12. 



Dr. MacGillivray, in his monograph of the Tertiary Polyzoa of 

 Victoria, on page 48, describes a species as new, under the name 

 S. squamosa, giving as synonyms S. marginata, T. Woods, and 

 Lunulites initia, Waters. He .says he was inclined to refer it to 

 S. marginata as Mr. Waters had done, though as the description 

 given by Woods disagreed witli it in many particulars, and was 

 so imperfect as to make the identification doubtful, he gave the 

 species a new name ; but, unfortunately, he gave it the same 



