^02 Annals of the South African Museum. 



Pliacops ''■' pupillas, sp. nov. 

 ,, arhuteas, sp. nov. 



„ crista-galli (H. Woodward). 



,, africanus, Salter. 



,, ocellus, sp. nov. 



,, hnjn-essus, sp. nov. 



,, {Cii/2)Jiceus) caffer, Salter. 



Phacops .', sp. 

 Dalinanites I una t us, sp. nov. 



sp. 

 Proetus nialacus, sp. nov. 

 Typhloniscus baini, Salter. 

 Homalonotus lierscheli, Murch. 

 ,, quernus, sp. nov. 



,, colossus, sp. nov. 



sp. 



The presence of a true Crypliczus and of spiny forms of Homalo- 

 notus indicates that the beds may be referred with certainty to the 

 Devonian, and it is probable that they belong to the lower division 

 of that formation. 



Few of the forms have any very near allies in Europe. Homalo- 

 notus licyschcli, Murch., somewhat resembles H. ctrmatus, Burm. 

 (from the lower part of the Coblenz Beds), and H. quernus, sp. nov., 

 seems to approach H. subarmatus, C. Koch t (from the Coblenz 

 Beds). The Phacopidae, on the other hand, are much more closely 

 allied to the forms which have been described from Brazil | and 

 Bolivia ^ from beds which are believed to be of Devonian age. 

 Thus, Pliacops africanus, Salter, resembles Acastc dcvonica, Ulrich ; 

 P. {GrypkcE.us) caffer is very similar to Cryphceus giganteus, Ulrich ; 

 and Dal manitcs, sp., seems to be closely allied to Dalinanites clarkci, 

 Ulrich. 



* Owing to the fact that the definitions of the iccognisctl sub-genera of Pliacops 

 ilo not tit many of the African forms, the term Pluiropg is used in a wide sense. 



t Cf. Freeh's figure of the head of this form, loc. cif., p. 218. 



I J. M. Clarke. As trilobitas do grez de Erere eMsecuru, Estado do Para, Brazil, 

 llev. Mus. Nac. , Kio de Janeiro, vol i., 1895 [1895 on title-page ; 1890 on coloured 

 wrapper]. Clarke's paper seems to have been separately published in 1890. 



5^ A. Ulrich. Palaeozoische Versteinerungen aus Bolivien., Neucs. .Tahrb. , Bcih- 

 Land viii., 189:5, p. 5. 



