Vol. 55.] DEVONIAN EOCKS OP NEW SOUTH WALES. 47 



Staurolonche tenella, sp. nov. (PI. YIII, fig. 14.) 



The cortical test is only shown in section ; the wall is slender, 

 with rounded pores ; the inner sphere is very delicate, and the pores 

 are circular. The spines are keeled and slightly longer than the dia- 

 meter of the test. Diameter, 0*09 mm. ; of inner sphere, 0*04 mm. ; 

 length of spines, O'll mm., and width at base, 0*022 mm. In 

 siliceous limestone. No. 245 3. 



Statjrolonche lateena, sp. nov. (PI. YIII, fig. 15.) 



The cortical test is only shown in section ; the wall is moderately 

 thick and minutely spined ; the medullary test is somewhat octa- 

 hedral in form ; the pores are subangular, and very unequal in 

 size. The spines are keeled or prismatic in section ; their axes are 

 not at right angles to each other. Diameter of the outer test, 

 0-095 mm. ; of the inner, 0'04 mm. ; length of spine (beyond the 

 test), 0*07 mm., and width at base, 0'015 mm. In volcanic tuif. 

 No. 387 D. The structure of the medullary test readily characterizes 

 this species. 



Staurolonche scitula, sp. nov. (PI. VIII, fig. 16.) 



Cortical test with thick walls and small pores ; the medullary 

 sphere is very delicate, and the pores are subangular. Only two 

 of the radial spines are preserved ; they are slender, apparently 

 circular in section, and very gradually taper to a point. Secondary 

 surface-spines are also present. Diameter of test, 0*1 mm.; of the 

 inner sphere, 0*042 mm. ; length of spines, 0*11 mm., and thick- 

 ness, 0*005 mm. Rare. Occurs in volcanic tuff. No. 387 d. 



Genus STAUEOLONCHiniUM, Haeckel. 



Test of two concentric latticed spheres, with four radial spines in 

 two different pairs. 



Statjeolonchidium obliquum, sp. nov. (PI. VIII, fig. 17.) 



The cortical test is thin, with small circular pores and surface- 

 spines : the medullary test delicate, with polygonal pores. The 

 spines are keeled ; those forming the transverse axis are imperfect, 

 but they appear smaller than those of the vertical axis. Diameter 

 of cortical test, 0*11 mm. ; of medullary test, 0*06 mm. ; width of 

 pores, 0*009 mm. ; length of vertical spine, 0*21 mm., and width at 

 base, 0*035 mm. In siliceous limestone. No. 245 3. 



Genus Teilonche,^ gen. nov. 



The test consists of two concentric latticed spheres, with three 

 radial spines at equal or unequal distances apart. Secondary surface- 

 spines are also sometimes present. The forms included in this 

 genus are very numerous in the Tamworth radiolarian rocks. 



^ Tpets \6y\ai : three spears. 



