170 Blhllof/rapliical Notice. 



BIBLIOGRAPHICAL Ts^OTICE. 



Paheontologia Tndica. Series IX. VoL II. Part 2. The Jurassic 

 Corah of Cutch. By J. W. Gregory, D.Sc, E.G.8. 19(5 pages 

 and Index, pages i-ix ; 26 plates (ii.a-xxvii.). Polio. Calcutta: 

 Geol. Surv. Office. London : Kegan Paul & Co. 1900. 



The fossil corals here described by Dr. J. W. Gregory, E.G.S., 

 late of the ]3ritish Museum (Nat. Hist ), now F.K.8., and Professor 

 of Geology in the University of Melbourne, Australia, were collected 

 by Wynne and Fedden in 18(37-69, and by Stoliczka in 1872, 

 Among the 8000 specimens dealt with there is an extreme varia- 

 bility, few of them being exact counterparts one of another. The 

 critical examination, here given in detail, has resulted in the 

 unavoidable creation of about 3000 new species and noticeable 

 varieties. The Jurassic series in Cutch, and the distribution of the 

 corals there in the several groups and zones or horizons, are noted 

 at pages 2-4. The previous geological notices by C. W. Grant, 

 W. T. Blanford, A. B. Wynne, F. Stoliczka, and W. Waagen are 

 duly recorded; and the summaries in chapter xi. of the ' Manual of 

 Geology of India,' part i. 1879, and chapter ix. of the second 

 edition, 1893-94, are referred to. 



The geological groups of Cutch have been previously classified 

 as follows : — 



Uraia group Tithonian. 



Xatrol -roup I ^' ^'l''''' l'^""^ " ' ' ' ^i^eridgia n 

 * ^ [ Lower part .... Oxfordian. "> 



f„ ■ f Upper part ... . (!)xfordian. 



Chan group i y ^ /-i n • 



'^ '■ [ Lower part. . . . Callovian. 



Putchura group Bathonian. 



Most of the corals come from the Upper Putchum beds, from a 

 place N.W. of Jumara, and several from the Chari beds ; but the 

 corals give no definite e%-idence of the succcssional or stratigraphical 

 value of these two groups. The systematic synopsis (at pages 3 1 -33) 

 indicates the recognized horizons of the several European species 

 most closely resembling (not necessarily closely allied to) these 

 Cutch corals, and shows that there may be 71 having such Euro- 

 pean representatives ; of these, 66 are supplied by the Putchum 

 beds, as follows, sliowing a confusion of specific relationships 

 among the more assorted formations : — Upper Cretaceous 3 ; Nco- 

 comian 8; Portlandian 4; Kimeridgian 12; Corallian 16; Callo- 

 vian 4 ; Bathonian 15; Bajocian 4; Triassic 1. "This apparent 

 'confusion of species' belonging to different horizons is usually 

 observed when distant coral-faunas are compared." The Cutch 

 " corals show that the beds are approximately equivalent or homo- 

 taxial to the European Upper Bathonian or Callovian, but they were 



