366 Bihliographical Notice. 



The description of the species occupies pages 4 to 132, and in the 

 Introduction (p. 3) this is apparently referred to as Part I. of the 

 work, the notes on the natural history of the fossils, their rela- 

 tionships, stratigraphical jwsition, and discovery being intended for 

 Part II., but these particulars appear to have been incorporated 

 with the description of each species. 



In his systematic treatment of the species of Ammonites from the 

 Spiti strata. Dr. Uhlig introduces the Ammonidea (p. 4) by care- 

 fully explaining that, not binding himself to the modern definition 

 of the genera, he draws up the description of each of the forms with 

 extreme minuteness, and indicates its " apparent position in the 

 most generally accepted system." Thus he prefixes his view of the 

 generic characters at the commencement of the account given of 

 each group of species. 



The classification of the species can be casually seen in the 

 several tabular lists at pages 77, 82, 83, 89, 93, 95, 96, 98, 99, 

 101, 102, 106, 107, no, 112, 114, 115, 117, 119, 121, 122, 124, 

 126, 127, 129, 130. The reference-numbers here annexed to the 

 species, which are arranged according to their natural affinities, will 

 be of some use to student and reader, especially as there is no 

 Index issued with this edition of the Memoir. 



The following and some other Ammonites (see pages 107-111, 

 112-118,119-125,126-130,130-132; and the table, /»/m, page 368) 

 from the Spiti beds are described, besides those mentioned at pages 

 4 to 74 :— 



A M SI O K 1 HE A. 

 PllYLLOCERAS, SvesS, p. 4. 



plicatum, sp. nov., p. 4. 

 strigile, Bhinford, sp., p. 6. 

 Lytoceras, /Swcss, p. 8. 



exoticum, Oppel, sp., p. 14. 



HoPLOCEEAS, Zitfcl, p. 18. 



Dieneri, sp. nov., p. 19. 



iudicnm, sp. iiov., p. 21. 

 Hecticoceras, Bonarelli, p. 23. 



Kobelli, Oppel, sp., p. 25. 



latistrigatum, sp. nov., p. 27. 



sp. nov. indet., p. 29. 

 OrPELiA, Waagncr, p. 30. 



The Oppelue of the Spiti fauna are classified in four groups 

 according to their lobal structure, as below. It is noted by the 

 author that " the name Opijelia (sensu stricto) should be reserved 

 for the group of suhradiatu, as Waagner, in establishing the genus, 

 had that group of forms above all in his mind." The generic aspect 

 is that of a smooth or feebly costate discoidal Ammonite. 



I. Group of Oppelia Adolphi, Oppel, p. 31 {Ammonites pictus, Quenstedt ; 

 Group of the Tenuilobafa, Oppel ; Streblites, Hyatt), represented by the 

 under-mentioned forms : — 



Page 



Oppelia (Streblites) Adolphi, Opp 42 



„ „ Kraftti, sp. nov 44 



,, „ Griesbachi, sp. nov 47 



„ „ pliiiiopicta, sp. nov 47 



,, „ sp. nov. indet 50 



„ „ indopicta, sp. nov 52 



„ ,, himalayana, sp. nov 51 



,, ., substriata, Oppel, sp 54 



,, ,, Lymani, Oppel, sp 5() 



