( 219 ) 



EXPLANATION OF PLATES. 



All the figures are drawn of the natural size. All the specimens figured are in 

 the collection sent for description, except the originals of pi. xxiv., figs. 9 and 10, 

 which are in the British Museum (Natural History). 



Plate XXIV. 



PIG. 



1. Phaco})!! piipilluif, sp. nov. ; head. Gamka Poort (59). 



2. Phacops arhuteus, sp. nov. ; a somewhat distorted glabella. Gamka Poort 



(64). 



3. Phacops urhutciiK, sp. nov. ; glabella. Gamka Poort (61). 



4. „ „ ,, tail and thoracic segment. Gamka Poort (40). 



5. Phacops crista-(jalli, (H. Woodward) ; thorax and tail. Drawn from a cast 



taken from a specimen preserved in intaglio. Gamka Poort (27). 

 <5. Phacops africanus, Salter (pars) ; two views of an almost complete but some- 

 what worn specimen. Gamka Poort (67). 



7. Phacops africanus, Salter (pars) ; head. The deep line crossing the glabella 



and uniting the posterior pair of glabellar furrows is a fracture only. 

 Gamka Poort (27). 



8. Phacops africanus, Salter (pars) ; tail. Gamka Poort (222). 



9. Phacops ocellus, sp. nov. ; head. Drawn from the original of Salter's 



P. africanus, fig. 6. Cedar Mountains (Brit. Mus., Eeg. No. 14956). 

 10. Phacops ocellus, sp. nov. ; thorax and tail. Drawn from the original of 

 Salter's P. africanus, fig. 9. Cedar Mountains (Brit. Mus., Eeg. No. 

 14957). 



Plate XXV. 



1. Phacops iiiipressus, .sp. nov. ; an almost complete but much-compressed 



specimen. The specimen is partially enrolled, and the tail (fig. lb) is 

 doubled under the body (fig. la). Some of the thoracic segments are 

 missing or concealed. Gamka Poort (43). 



2. Phacops imprcssus, sp. nov. ; a smaller but less compressed tail. Gamka 



Poort (50). 



3. Phacops {CrifphcBUs) caffer, Salter ; portion of head. There is an imperfect 



tail, similar to that shown in fig. 4, on the same block. Egelfontein, 

 Ceres (18). 



4. Phacops (Cryphaus) caffer, Salter ; tail and part of thorax. Wolvaarts Farm, 



near Ceres Village (34). 



5. Phacops ? sp. ; thorax and tail. Keurboom's Eiver, Knysna (70). 



6. Dahnanitex lunatus, sp. nov. Drawn from a cast of the specimen. Gamka 



Poort (66). 



7. Dalmanites, sp. ; portion of tail. Gamka Poort (38). 



8. Tijpliloniscus haini, Salter; a head and part of thorax, h side view of same 



specimen. Gamka Poort (41). 



9. Ti/pliloniscus ba i n i, Sa,ltev ; part of thorax. Gamka Poort (63). 



10. Proctus malacus, sp. nov. ; nearly complete specimen, but probably with one 

 thoracic segment missing. Gamka Poort (45). 



