NO. I CAMBRIAN FAUNAS OF EASTERN ASIA I3 



northern India has a stronger affinity with that of western North 

 America than with any other Cambrian famia.' The bearings of this 

 are not enlarged upon further than to indicate a connection between 

 the Himalayan region and North America during Middle Cambrian 

 time. 



The superb memoir of MM. J. Deprat and H. Mansuy, published 

 as Volume i, parts i and 2, of the Memoirs of the " Service geolo- 

 gique de ITndo-Chine," 1912/ contains a great addition to our 

 knowledge of the Cambrian rocks and faunas of Indo-China. Dr. 

 Deprat ' gives a very full description of the Cambrian formations 

 as they occur at various localities with lists of the contained fossils. 

 From this we learn that there is a series of coarse and fine sandstones 

 at the base of the Cambrian some 500 meters (1,640 feet) thick that 

 are overlain by shales, both calcareous and arenaceous, with inter- 

 bedded quartzitic sandstones. Above the lower sandstones there 

 are about 410 meters (1,345 feet) of beds containing remains of 

 the trilobite genus Redlichia, that are referred to the Lower Cam- 

 brian, and from 200 to 300 meters (656 to 984 feet) of beds classed 

 with the Middle Cambrian (Acadian). A great unconformity is 

 indicated between these beds and the Ordovician strata by the ab- 

 sence of the Upper Cambrian and the lower Ordovician formations. 



The faunas described by Dr. Mansuy from the Cambrian include :' 



Cambrian 

 Annelids : Trilobites : 



Planolites ? Redlichia chinensis Walcott 



Brachiopods : 



Redlichia nobilis Walcott 

 Redlichia walcotti Mansuv 

 Obelus ? detritus Mansuy Redlichia carinata Mansuy 



Obolus damesi Walcott 

 Obolus of. chinensis Walcott 



Redlichia sp. ? 



Palceolenus doiivillei Mansuy 

 Lmgula yunnanensis Mansuy Palceolenus lantenoisi Mansuy 



Acrothele matthewt eryx Walcott Palceolenus deprati Mansuy 



Jcrothele orbicularis Mansuy Ptychoparia yunnanensis Mansuy 



OSTRACODS : 



Bradoria douvillei Mansuy 

 Aluta sp. ? 

 Nothozoe ? 



* Records Geol. Surv. India, Vol. 40, plate i, 1910, p. 10. 



'Mem. service geol. I'lndo-Chine, Vol. i, 1912 (received May 8, 1913)1 

 fasc. 2, Etude geologique du Yun-Nan oriental, lie partie, pp. 1-146, pis. 1-25: 

 Paleontologie. 



° Idem, Pt. I, pp. 47-62. 



* Idem, Pt. 2, pp. I, 2. 



