391 



to say to what genus the remains really belong ; » amongst 

 other genera 1C 'orynexochus, or perhaps Blountia, may put in 

 a claim. 



Loc. — Neighbourhood of Mount Ida, Heathcote, Vic- 

 toria (Gregory). 



Hor. — Ordovician (Gregory): Cambrian (Etheridge). 



Caroline Creek Trilobite Remains. 



In my early account of these casts I figured, but left 

 unnamed, portions of four cephalons. In each instance a 

 glabella was preserved, parts of the neck -rings and anterior 

 limbs, and traces of the fixed cheeks. All four types have 

 certain features in common, such as the broad, short 

 glabellae, deeply excavate anterior areas with thick and 

 prominent limbs, and deep neck furrows ; they differ only 

 in proportional measurements and numbers of pairs of 

 glabella furrows. 



Since 1882 I have had opportunities to examine* other 

 examples of the Caroline Creek grit in which these remains 

 occur plentifully, but always found the latter in the same 

 tantalizing imperfect condition. In the absence of complete 

 fixed and free cheeks it is most difficult to suggest a generic 

 reference with any degree of certainty, but in my original 

 remarks I compared one to Loganellus, Devine, and another 

 to Bathyurus, Billings. ( 46 ) In a later communication I sug- 

 gested Ptycho , paria^ an) and for merely descriptive purposes 

 perhaps here these cephala had better remain tentatively. At 

 the same time other genera than those mentioned put in a 

 claim, such as Bathyurellus, Billings; Chuangia, Waleott; or 

 even Pagodia, Walcott. 



Ptychoparia( ?) carolinensis, n, sp. 



Head shield, (?)Conocephalites, Etheridge: Proc. Roy. Soc. 

 Tas., 1882 (1883), pp. 156 and 162, pi. i., figs. 8 and 9, (?)fig. 11. 



Loganellus (? ) or Conocephalites (? ), Johnston: Syst. Ace. 

 Geol. Tas., 1888, p. 37. 



Chars. — Glabella broad-oval or oblong, rounded an- 

 teriorly, and all but in contact with the fillet of the anterior 

 limb, broad posteriorly; fillet and neck-ring prominent, the 

 neck furrow deep ; two pairs of glabella furrows, basal and 

 middle. 



Obs. — The outline of the glabella (figs. 8 and 9) and 

 that of fig. 11 are remarkably alike, and it is possible they 

 may be identical as to species. 



(46) Etheridge : Papers and Proc. Rov. Soc. Tas., 1882-3 

 (1883). 



(47) Etheridge : Trans. Roy. Soc. S. Austr., xxxii., 1882, p. 3. 



