J:04 Alba/mj Museum Rpcords. 



4. Hor/iaJouofus h.'j:.n.s\i. 4a, end of one of the body segments. 

 Cat. No. 1462. Bokkeveld beds. No locality. 



4b. The first four body segments of a smaller indidnal. 

 Cat. No. 1. Bokkeveld beds, Cederbergen. 



5. Honialonotuf! hippocantpus, n. sp. 5a, dorsal aspect of 

 the head. The marginal spines on the neck ring are badly shown. 

 5b, lateral aspect of the same. 



Cat. No. 64. Bokkeveld beds. No locality. 



Plate X. 



1. PliacDjis ceres, n. sp. 1, dorsal aspect. la, lateral aspect. 

 Cat. No. 67. Bokkeveld beds. No locality. 



2. Phacojis callitris, n. sp. 2, dorsal aspect. 2a, lateral aspect. 

 2b, under surface of the head shield. 



Cat. No. 29. Bokkeveld beds, Cederbergen, Clanwilliam. 



3. Phacojis gi/fhnri, n. sp. 3, dorsal aspect. 3a, under sur- 

 face of head shield. 3b, lateral aspect. 



Cat. No. 28. Bokkeveld beds, Gydow Pass, Ceres. 



3c, the 6th, 7th, 8th and 9th body segments of an obscure 

 specimen, showing the forward curving of the pleurae at their 

 ends. 



Cat. No. 26. Gydow Pass, Ceres. 



4. Phacops acacia, n. sp. 4, dorsal aspect of internal cast of 

 part of the head, with further details drawn in from artificial casts 

 of the impression of the outer surface. 



4a, Artificial cast of the impression of the body of the same 

 specimen seen from the side. 



Cat. No. 2124. Bokkeveld beds. No locality. 



5. Proelus ricardi, Schenck. Vulcanite cast of the specimen 

 mentioned by Schenck. 5, dorsal aspect. 5a, lateral aspect. 



Cat. No. 35. Bokkeveld beds, Cockscomb Mountains. 



G. Pliaaqjs crista-galli. Woodward. Plaster cast of the origi- 

 nal specimen taken before it was sent to England. Dorsal aspect 

 of the head shield. 



Cat. No. 5. Bokkeveld beds. Cockscomb Mountains. 



