•^94 Alhany Museum Records. 



regularly arcuate, with a triangular depression, causing tlie front 

 margins to appear prominent. Surface smooth, except in front of 

 the glabella, which is covered with irregular granules. 



Remarks. — ^This species agrees in many particulars with 

 Lake's form P. oceJlm, Salter's P. africanus (pars) Plate XXIV,, 

 tig. 6. The character of the eyes and the glabella especially are 

 almost the same, but P. ocellus wants the marginal border to the 

 cheeks, and the first pair of axial furrows are short and shai-ply 

 bounded instead of being shallow and long, and the eyes are 

 placed more forwards. These, however, are small differences and 

 insufficient to separate P. callUris from P. ocellus, had not Lake 

 seen several precisely similar heads in the British Museum, all 

 without the marginal spike. Salter adds in his figure a pair of 

 backwardl}^ directed spines issuing from the genal angles ; these 

 were probably put in from an impression of the outer surface. 

 In P. ncncia I repeatedly obtained casts of the head with the 

 genal angles rounded, owing to air filling in the hollows and pre- 

 venting the plaster to penetrate, and it was not till I first filled in 

 the cavities where the spines had been that I obtained a cast show- 

 ing these distinctly, so that in natural casts the spines would not 

 be reprpvsented. In P. callitris the genal angles converge to the 

 spike So markedly that this feature could not be overlooked in a 

 series of specimens. I have named the species after the Cape 

 Cedar, Callitris ( Widdrinytonici) juniperoides. 



Dimensions : Length, 2 -t cm. Breadth, 3.6 cm. Width of 

 glabella at base, 1.6 cm., in front, 2.2 cm. Length of glabella 

 from neck furrow to front suture, 2 cm., from neck furrow to 

 base of first axial furrow, 8 cm. Width between eyes (inner 

 margin of facets), 2.4 cm. 



Cat. No. 29, Type. Locality, Cederbergen. Donor : Mr. A. 

 G. Bain. 



Cat. No. 34 (Labelled Prtxlus ricardi. Schtiick). Localily 

 Cockscomb Mountains. Donor : Mr. Pinchin. 



Phacops ( Grypltaf'Hs) ceres, nov. sp. 



PI. X., Figs. 1, la. 

 This species is represented in the Albany Museum by two 



