20 D.P. GORDON AND P.D. TAYLOR 
Figs 45-50 Onychocellid cheilostomes. 45-47, Inversaria gondwanae sp. nov.; 45, IGNS BZ 187-1, holotype, erect branching colony, x 14; 46, IGNS 
BZ 187-2, autozooids and orifices; note the granulation of the cryptocyst in one zooid and circular holes indicating the location of possible heterozooids 
in some zooids, x 65; 47, IGNS BZ 187-3, longitudinal section of a branch showing interiors of two peristomes and parts of two autozooids, x 116. 48- 
50, Chondriovelum fossilis sp. nov.; 48, IGNS BZ 188-2, part of a branch, proximally fractured, x 38; 49, IGNS BZ 188-1, holotype, vicarious 
avicularium, x 67; 50, IGNS BZ 188-3, autozooidal orifice, x 180. 
