Vol. 55.] BEVONIAN ROCKS OP NEW SOUTH WALES. 51 



Order PRUNOIDEA, Haeckel. 

 Genus Ellipsidttjm, Haeckel. 



The test is a simple latticed ellipsoid, with radial spines on its 

 surface. 



Ellipsidium castanea, sp. nov. (PL IX, fig. 4.) 



Test small, with subequal rounded pores and lattice-bars about 

 half the width of the pores ; the spines are short and conical. 

 Major axis of test, 0*095 mm. ; minor, 0*075 mm. ; width of pores, 

 0*01 mm. ; length of spines, 0*015 mm. E-are. In siliceous lime- 

 stone. ]N"o. 245 3. 



Genus Ellipsosti^ma,^ gen. nov. 



The test is a simple latticed ellipsoid, with four radial spines, 

 which proceed from a central spot or a short bar in the centre of 

 the test. Secondary spines are also present. 



The nearest genus with which this may be compared is Stigmo- 

 sphmrostylus, Eiist, in which six radial bars extend from the centre 

 of a spherical test.^ 



ELLiPsosTiaMA austeale, sp. nov. (PI. IX, fig. 5.) 



The test is oval, with minute rounded pores ; in the centre four' 

 straight rods extend from a small bar in different directions to 

 beyond the circumference of the test, so as to form short conical 

 spines. Minute secondary spines arise from the nodes of the mesh. 

 Major axis of test, 0*12 mm.; minor, 0-1 mm.; width of pores, 

 0*006 mm. ; radial spines, 0*03 mm. Rare. In siliceous lime- 

 stone. No. 245 3. 



Genus Staurodrtjppa,^ gen. nov. 



The test consists of two concentric latticed ellipsoids, cortical 

 and medullary, with four radial spines, disposed crosswise in two 

 axes, but not always at right angles. The radial spines may all be 

 similar, or those of the same axis may be similar ; but, owing to the 

 imperfect preservation in the fossil forms, this feature can seldom 

 be ascertained with certainty. This genus corresponds with 

 Staurolonche, Haeckel, and Staurolonchidium, Haeckel, in the 

 Sphgeroidea. 



Stat:rodruppa pe^longa, sp. nov. (PI. IX, fig. 6.) 



The cortical test has a smooth surface ; the pores are about as 

 wide as the lattice-bars. The medullary test is only shown in 

 section. The radial spines appear to be in pairs ; those of the major 

 axis are prismatic, very long and stout, and those of the transverse 



^ "EXXeti/zis, ellipse ; oriyjua, spot. 



2 Palgeontographica, vol. xxxviii (1892) p. 142, 



^ Sravpos, cross ; dpvTnra, olive. 



e2 



