387 



continuous curves independent of the latter, and not con- 

 fluent as in Olenellus. The fixed cheeks are very narrow, 

 whilst the facial sutures are much pinched-in at the anterior 

 ends of the palpebral lobes, giving to the antero-central por- 

 tion of the cephalic shield a very characteristic "halbert"- 

 shaped appearance. 



To this genus I now refer Olenellus ( ? ) forresti, Eth. fil., 

 and Foord, from Kimberley. A glance at Mr. A. H. Foord's 

 figure < 4 °) will at once reveal the very close resemblance exist- 

 ing between 0.(1) forresti and Redlich's Hoeferia noetlingi, 

 the type species of Redlichia, and following Mr. Walcott's 

 suggestion ( 41 ) I now transfer it to that genus. 



Redlichia forresti, Eth. fil. and Foord. 



Olenellus (?) forresti, (Eth. fil., m.«s.) Foord: Geol. Mag., 

 vii. (3), 1890, p. 99, pi. iv., figs. 2a, b. 



' Protolenus forresti, Matthew: Canadian Rec. Sci., v., 1892, 

 p. 253. 



Obs. — Mr. G. F. Matthew suggested the reference of this 

 Trilobite to his genus Protolenus on account of its continuous 

 eye lobes. He remarked that these continuous eye lobes "are 

 close to the glabella, leaving a very narrow fixed cheek. The 

 eye lobes and the middle piece of this head-shield are well 

 defined, and give no reason for supposing that the outer cheek 

 was fixed, without which the reference to Olenellus is in- 

 admissible." 



In opposition to Mr. Matthew's suggestion I would 

 observe : — 



1. The general appearance of the glabella, fixed cheeks, 

 and eye lobes respectively in Olenellus ( ?) forresti is very dif- 

 ferent from that of Matthew's type, Protolenus elegcms. 



2. The glabella in Protolenus bears three pairs of lateral 

 furrows, but in the Australian Trilobite these furrows are 

 continuous, and said to be four in number. 



3. In Matthew's type a pygidial telson is unknown, but 

 he informs us that "such an appendage exists in a Sardinian 

 species, and is like that of Paradoxides (or Olenus)." Mr. 

 Foord remarked: — "From the same locality as the head just 

 described there is a short spine (fig. 2a), probably belonging 

 to the present species; if so, it would be the telson." ( 42 ) I, 

 however, suggest it may be one of the genal spines and 

 therefore quite in keeping with the structure of Redlichia. 



(40) Foord: Geol. Mag., vii. (3), pi. iv., figs. 2a, b. 



(41) Walcott : Smithsonian Miscel. Collns., 64, No. 1, 1914, p. 62. 



(42) Foord: Geol. Mag., vii. (3), 1890, p. 99. 

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