Review of Recent Geological Literature. 399 
of very primitive and distinctly Cambrian types and with .stout, argu- 
ments maintained its Upper Carboniferous age. It is some time since 
Waagen revised this opinion, with the aid of trilobites subsequently 
discovered in the same rocks by the English members of the survey, who 
had found the brachiopods and had regarded them of Silurian age. 
The history of this discussion is briefly reviewed by Noetling in this 
paper, and the author, in the light of some additional discoveries, dis- 
sents from all of Waagen's later conclusions in regard to the Cambrian 
faunas. Noetling proposes the following subdivision of the Salt Range 
Cambrian, in descending order : 
4. Bhaganwalla group, or salt-crystal pseudomorph /one; 
8. Jutana group, or magnesian sandstone; 
2. Khussak group, or Neobolus beds; 
I. Khewra group, or purple sandstone. 
The Khussak group alone contains fossils and is the oldest t'ossilifer- 
ous formation of the Salt Range. Noetling makes a five-fold division 
of it: 
V. Zone of Olenellus sp., with "brachiopods belonging to the family 
of Trimerellidte" (Lakhmina ?) and probable fragments of Olenellus. 
IV. Zone of Neobolus voarthi. 
III. Upper annelid sandstone. 
II. Zone of Hyolithes wynnii, with Neobolusl sp. and small trilobites. 
I. Lower annelid sandstone, with HyoUthes and some "bivalves." 
The position* in the series, of the trilobites which determined, for 
Waagen, the Cambrian age of the fauna, viz., Conocephalites ibarthi and 
Olenm ? indicus W., is uncertain. It is stated by Noetling that they do 
not belong to the genera to which they were referred, and the two writ- 
ers are at open variance in their interpretation of the fauna! succession. 
a difference which cannot be adjusted without, "another candle." 
.Meanwhile the foreign members of Dr. King's survey are "out." 
.1. M. c. 
On the Occurrence of Chipped (?) Flintsin the Upper Miocene of Burma, 
By Fritz Noetling. (Records of the Geological Survey of India, vol, 
xxvii, pt. 3, pp. 101-103, ])1. 1, 1894.) 
The Hint Hakes described were found by the author himself in a fer« 
ruginous conglomerate in the Yenangyoung oil-fleld, containing re- 
mains of Rhinoceros and Hippotherium. The (lakes figured certainly 
suggest human workmanship, and as to their nature the author says; 
"I do not want to express an opinion; all I can say is. that if Hints of 
this shape oau be produced by natural causes, a good many chipped 
Hints hitherto considered as undoubtedly artificial products are open to 
grave doubt as to their origin." j. m. <■. 
Cone-in- Cone: how it occurs in /hi Devonian series in Pennsylvania, with 
further details of Us structure, varieties, •/>■. |',y \V. s. Gresli t. (Quart. 
.lour. Geol. Soc, London, vol. 50, pp. 731-739, wit h plates \.\xv and xxxvi. 
Nov. 1st, 1894.) In the Portage beds of northwestern Pennsylvania the 
Cone-in-COne Structure is shown to hi' a product of a Herat inn. It occurs. 
