BY R. VON LENDENFELD, PH.D. 471 



102. DIPLOGRAPSUS PALMENS. Barrande. 

 Very abundant in the black Llandeilo flags (1.) 



18. GENUS. CLIMACOGRAPTUS. Hall. 



Cells vertical, free, in section suboval, divided from each other 

 by deep cavities, without ornament or with a simple marginal 

 spine. Hydrosome tapering, in section circular, or divided into 

 two flaps. Axis prolonged beyond the distal end. 



103. CLIMACOGRAPTUS BICORNIS. Hall. 

 This species has been found in Victoria (2.) 



6. SUB-FAMILY. PHYLLOGRAPTIN.E 

 PHYLLOGPtAPTID.E. Lapworth. 



Hydrosome consists of four biserial axes, which coalesce with 

 their dorsal sides. Sicula imbedded. The broader ends close to 

 the proximal terminations of the Hydrosomes. 



19. GENUS. PHYLLOGRAPTUS. Hall. 



Leafshaped, cells rectangular, the lateral surfaces touching. 

 Outer opening with two protruding spines. 



104. PHYLLOGRAPTUS FOLIUM. Hisinger. 

 The variety P. F. var. Typus Hall of this species is very 

 abundant in many places in Victoria (3.) 



II. GROUP. RETIOLOID.E. Lapworth. 

 No Sicula. The Coenosark of the common canal developes a 

 double row of cells. Epidermis supported by chitinous fibres. 



7. SUB- FAMILY. GLOSSOGRAPTIN.E. 

 GLOSSOGRAPTID.E. Lapworth. 



Both axes united in the middle of the body. 



No Australian representatives are known of this Sub-family. 



(1.) McCoy. (I.e.;, Decade II., p. 32, pi. XX. 

 (2.) McCoy. (I.e.), Decade I., p. 12, pi. I. 

 (3.) McCoy. (I.e.), Decade I., p. 7, pi. I. 



