48 A MONOGRAPH OF THE TERTIARY POLYZOA OP VICTORIA. 



3. .S*. .sqiiawosfi, n.sp. PI. VII., tigs. 10, 11, 12. 



Solpiuiria marffiinifa, "Waters, Q..T.G.S., Aug. 1881, p. 311.; Lunulites iuilia, 

 AV;it(M-s, Q.J.G.S., Aug., 1883, p. 442. 



Zonriuin small, discoid, slightly convex. Zorecia rounded or ovate, the margins 

 tiiin, raised, sometimes slightly overlapping the zocecium heyond; lamina tinely 

 granular, depressed inferiorly ; aperture lol'ty, ai'ched al)ove, holloAAed helow ; 

 vibracular cells sm;ill, ii'regulai'ly placed among the zoa^cia, elliptical, cribriform. 

 Dorsal surface divided in an irregularly radiating manner by grooves, between 

 wliieh the surface is convex but not pitted or i)orous. 



Var. Iiicpiis. Vibracidar cells linely ])orous or punctate. Dorsal surface with 

 irregularly radiating and branched grooves, tlie intervening cl(!vations smooth, 

 .shining and glassy. 



S.P. ; M.C. ; Bel. ; C.C. OV.) Living. Australia. 



Var. ptiIchcUd, PI. VTI., fig. 13. Zorecia bi-oad, i'ound(>d m- lunate, very little 

 or not at all oveidapping ; margins thin; lamina finely granular; apertui'e lofty, 

 wider above, contracted Ixdow, the lower edge slightly convex and the angles 

 slightly incised ; vibracuhir cells about half the .size of the zocecia, with a thin 

 margin and tinely ])erforated surface. Dorsal surface of zoarium with radiating, 

 dichotomously divided raised lines, the intei'vening broad ridg(>s granular and with 

 a few pores. 



B(«l. 



I was at first inclined to refei- this species to T. Woods' >S'. maryinata, as has 

 been done by AVatei's, but the description given by AVoods disagre(>s ^\ith it in 

 several ])articulars and is so imperfect as to make the identification exceedingly 

 doubtful. lender these circumstances I think it advisable to give the jjrcscnt 

 species a dillcrent name. 



The vil)raeu]ar cells vary a good deal. They are occasionally very small, 

 pointed, and with one to tliree or four seriated j)ores. These occur not only at the 

 growing edges of the zoarium, but in .some specimens aLso scattered among the 

 internal zoo'cia. They are usually about half the size of the zocceia, irregularly 

 shaped, with a thin border and the surface tinely crii)riform. in var. litceiis the 

 pores on the vibracularia arc very minute, and the surface may he only finely 

 punctate. 



4. S. conciinia, Tenison Woods. PI. VII., fig. 15. 

 Selenaria conchwo, T. Woods, I.e., p. 10; Waters, A.M.N.H., Sept., 1887. 

 Zoarium discoid, raised in tiu' coitrc, concave posteriorly. Zo(fcia arranged 

 in radiating lines, lunate or semicirculai', not overlapping; margins tiiin, erenulated; 



