4i A MONOGllAPU OF THE TEKTIAllY POLYZOA OF VICTORIA. 



B. Living. New Zealand. 



I have no doubt this is the species so named hy Waters, altliou^'li my 

 specimens diiVer from his description and lignres in tht; slighter arching of tlie 

 iipjier edge and the somewhat dilferent form of the avicularia. The calcareous 

 overgrowth gives it a very 2)eculiar and characteristic appearance. 



Luuulites, La mo lira lid-. 



Zoarium usually more or less orbicular, convex on the anterior sui Face, plain 

 or concave on the dorsal. Zoaria elongated, with much raised, highly calcilied, 

 sloping, granular or crenulated margins ; area partly tilled in hdow and occasionally 

 on tlic sides by a calcareous granular lamina, which slopes downwards from the 

 margins. Vibracularia large, usually in special tracts betAveen the zocecial series, 

 but occasionally situated at the summit of a zotecium (Cupularia) or irregularly 

 interspersed. 



Lunulites, including Cupularia, and Selenaria are usually considered to con- 

 stitute a distinct family, distinguished by the discoid or orl)icular form of the 

 zoarium, which also seems to be generally free and unattached, and by the presence 

 of powerful vibracularia. The structure of the zooecia, however, is so entirely 

 membraniporidan that it seems to me they should be included in that family. 

 This view has already been held by Gregory, Koschinsky and others. Busk has 

 distinguished LunulUes by having the vibracularia in separate tracts between the 

 zoa'cial scries, Ciqyuluria by having a vibraeuluin at tlie summit of each zoa>cium, 

 and Selenaria by having some of the zoa'cia, scattered irregularly among the others, 

 of a different form and furnished with vibracula. In the present pajwr I distinguish 

 the genera by the structure of the zoceeia, a division founded merely on the 

 arrangement of the vibracula bringing tog(!ther species structurally dilferent and 

 separating otlu-rs in which the zoceeia are similar. Cupularia should, I think, be 

 included in Lunulites. 



1. L. parvlcella, Tenison Woods, sp. PI. VII., tigs. 1, 2. 



Selenaria ijai-cicella, T.Woods, T.Il.S.S.A., 187'.), p. 10; Waters, Q.J.G.S., 

 1883, p. Ml. 



Zoarium nearly flat. Zorecia in radiating lines, broad, distinct; margins 

 granular, sloping doAvnwards and inwards to the aperture, a large, granular slo])ing 

 lamina below ; aperture occupying about two-thirds of the area, narrower above, 

 slightly contracted in the middle ; vibracularian cells situated irregularly between 

 the zoa'cia, narrow pyriform, very long, the margins sloping and granular. Dorsal 



