2-i-i Jiibliographical XoUces. 



pages 3-10 ; and theu the main object of this memoir, namely the 

 detailed description of the Lower Triassic Cephalopoda of the Hima- 

 layas, is carried out at pages 11-16-i, with good illustrations on 

 plates i. to xxiii. 



The following are the genera of Cephalopoda here figured and 

 described : — 



Amnionea trachyostraca. Species. I Species. 



CeraUtes 2 Ophiceras 10 



Danubites 13 ! j' Meekoeeras 5 



Ammonea leiostraca. Sub- 1 Kouiuekites 2 



Prosphingtes 2 genera j Kingilei 1 



Medlicottia 1 (_AspiJite9 1 



Hedenstrcemia 2 L3i?anites 2 



Nannites 2 Prioaolobus 1 



Proptychnites 4 Hugirites 1 



Vishnuites ... 1 Olooaras (j 



Flemiugites 4 \ 



The faunistic and geological results are worked out at pages 105- 

 179 ; and the accompanying tabular statement (pp. 242-243) shows 

 the correlation of the Upper Permian and Lower Trias formations of 

 the Himalayas with those of other countries. 



The Palceontohgy of the Niagaran Limestone in the Chicago Area. 

 The Crinoidea. By Stpart Weller. Bull. Nat. Hist. Survey 

 Chicago, iv. part 1, 153 pp., xv. pis., and text-figures. 27th June, 

 1900. 



This is the first contribution to the palaeontology of the area covered 

 by the IS^atural History Survey of Chicago, and including nearly 

 ISOO square miles. It should be particularly useful to the students 

 of the Chicago University in its general account of the Crinoidea, 

 as illustrated by specimens which, though not particularly well- 

 preserved, are the nearest to their hands. To students of this group 

 of animals the work is of intere.st as recording the occurrence of 

 Crotalocrinu'^, Pgcnosacciis, and Corj/mbocrinus — genera previously 

 unknown within the limits of the present United States of America. 

 To those whose outlook on palaeontology is wider the memoir should 

 appeal as presenting Dr. "Weller's views on the distribution of the 

 sea-basins of the iS'iagara-Wenlock Age. He believes that the 

 Scandinavian and English fauna was connected with that of the 

 Mississippi Valley, by the intervention of a North Polar Sea. more 

 closely than it was with the nearer sea-basin of Xew York, the 

 latter forming a separate bay, in which the development pursued a 

 somewhat independent course. Among hiuhly specialized forms 

 common to the Mississippian and Scandinavian regions are : the 

 weU-known Crotalocrinus, so far represented in America only by a 

 meagre fragment ; the strange Petalocrinus, first made known by 

 Dr. Weller himself, and afterwards elaborately described by Bather ; 

 the curious operculate coral Goniophyllum ; and the little twisted 

 Brachiopod Streptis. 



A work of this size and importance should certainly have been 

 provided with an index. 



