PLATE IX. 



FIGS. PAGE 



1. Holcostephanus wilmance sp. nov. 195 



la. Apertural view. Aasvogel Krantz, above Modder Drift, 

 Sunday's Elver. In the collection of the Geological Society of 

 London (No. 10975A). 



2. Holcostephanus cf. baini (Sharpe) 199 



Probably from Sunday's River. From the South African Museum 

 collection. 



3. Holcostephanus rogersi sp. nov 201 



Apertural aspect. Sunday's Eiver. South African Museum 

 collection. 



t, 5. Meyeria schwarzi sp. nov. ... ... ... ... .. ... 212 



4. Dorsal view of the carapace ; 4a, transverse section across the 

 carapace, as viewed from the front, where the rostral region is 

 missing. Bare slope W. 30 S. from the middle of Barkly Bridge, 

 on the farm Olifant's Kop, Sunday's Eiver. 



5. Segments iii.-vi. of the abdomen in extended position , dis- 

 playing the pleura. Same locality (38h). 



