P 3 '4] CAMBRIAN HORIZONS OF COMLET. 369 



areas ; the pteropoda and gasteropoda, on the other hand, are, 

 unfortunately, almost all new to science, but they serve to accen- 

 tuate the divergences between the local faunas. The ostracoda, 

 though well preserved, are very difficult of extraction without 

 damage. Their general aspect is reminiscent of those described 

 by Dr. G. F. Matthew (1902 & 1903) from the Protolenns and 

 Etcheminian faunas and, so far as they go, these fossils help to 

 confirm the opinion that the place of those two faunas is rather 

 high up in the Lower Cambrian Series. 



Lower Cambrian. 



Horizon Aa. The Wrekin Quartzite. 

 Only one fragment of a corneous brachiopod has been found. 



Horizon Ab r . Obolella (?)-groomi Beds. 



Micromitra (Patevina) phillipsi. 

 Micromitra (Patevina) rhodesi. 

 Micromitra (Paterina) kingi. 

 Walcottina laptvorthi. 

 Walcottina elevata. 



Obolella (?) groom i. 



Hyolithus strettonensis. 



Hyolithellus sinuosus. 



Certain ovoid and elongate bodies 

 that have been calcareous, and show 

 only vague traces of organic origin. 1 



Micromitra (P.) phillipsi and Obolella (?) groomi are found in the Malvern 

 Quartzite and Hollybush Sandstone, while Hyolithus strettonensis may 

 possibly be identical with H. primeevus Groom of the same group. 



On physical evidence Dr. C. Callaway correlated the sandstones of Comley 

 with the Malvern Hollybush Sandstone ; the fauna as enumerated above tends 

 to prove that his correlation was, at least in part, correct. 



Horizon Ab 2 . 



Hyolithus cle geeri (?), Hijolithellus micans var. pallidus, and tracks on the 

 surfaces of the flaggy beds. 



Horizon Ab 3 . Hoi mi a Sandstone. 

 Holmia (?) sp. indet., Hyolithellus micans var. pallidus. 



Horizon Ab t . 



Small and obscure ostracoda, gen. et sp. indet. 



Horizon Ac,. Callavia Sandstone. 



Micromitra (Paterina) labradorica. I Microdiscus attleborensis . 



Obolella atlantica var. comleyensis. \ Callavia callarei. 



Hyolithus sp. indet. 



Hyolithellus micans. 



Helcio7iella rugosa var. comleyensis. 



The relation of this fauna with that of other horizons is discussed below 

 (p. 370). 



Horizon Ac.,. Olenellus Limestone. 



The Olenellus Limestone was the first horizon in the Comley 

 area to yield any recognizable Lower Cambrian fossils, and natur- 

 ally becomes a stratigraphical and palreontological datum to which 

 other horizons may be referred. The complete fauna, so far as at 

 present known, is tabulated below (p. 370). 



1 Cobbold, 1914, p. 480 ; and 1916, p. 118. 



Wanneria (?) sp. nov. 

 Callavia cobboldi Eaw MS. (?). 



