508 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [JuTlG 17, 



and most of the Bracliiopoda have as yet only been found in the 

 lowest beds of the Lias, known to European geologists under the 

 name of Rhaetic or Avicula-contorta beds, or under the name of 

 Kossner-Schichten. None of the species have to my knowledge been 

 found in other than Liassic beds, and I have not met in the Hima- 

 layas with an exception from this rule. 



h. The Upper Tagling limestone is of a similarly dark-grey colour as 

 the previous one, but it is generally dolomitic. Stratigraphically 

 both are rather diflS.cult to separate. Fossils have been met with 

 only in one place ; but those which have been identified are the same 

 which occur in the Liassic beds on the Hierlatz (Lower Austrian 

 Alps), and of which I published a monograph La 1861 (Sitz. Akad. 

 "Wien, vol. xliii. p. 157). The species are Chemnifzia undulata, Uss., 

 Troclms htiluhms, Stol., T. epidus, d'Orb., T. attenuatus, Stol., and 

 Terehratida Sinemuriensis, 0pp. Other species could not have been 

 identified ^vith sufficient accuracy ; but except a Belemnite, which re- 

 sembles B. hisidcatus of the lower beds, none of the fossils have 

 been found common to any of the other Jurassic strata of the Spiti 

 valley. 



2. DOGGEE. 



c. I met, above the Loive?- Tagling limestone, near Gieumal, a thin 

 bed of a clayey slate, which gradually appears to pass into the Spiti 

 shales overlying the same. The only fossils were fragments of 

 Belemnites, and a Posidonomya which seems to be identical T\ith P. 

 ornata, Quenst., of the Lower Oolite. 



d. The Spiti shales occupy a very distinct horizon, and are litho- 

 logicaUy, as well as by their exterior appearance of black colouring, 

 very easily separated from any of the other strata. I^early all the 

 Jurassic Cephalopoda which have at different times been brought or 

 sent home by Himalayan travellers have been obtained from these 

 beds. 



The following are their characteristic species : — BhyiichoneTla 

 varians, Schloth. sp., Pecten lens, Sow., Trigonia costata. Park., Am- 

 monites macrocephalus, Schloth., A. ParJcinsoni, Sow., A. curvicosta, 

 Opp., A. Brachenridgii, Sow., A. liparus, 0pp., A. triplicatus. Sow., 

 A. hi'plex, Sow., and Belemnites* canal iculatus, Schloth. A large 

 number of other new species of MoUusca have been found and de- 

 scribed, and several of these are identical with species from the 

 Middle Jurassic deposits of Cutch. 



3. Malm(?). 



e. Grieumul Sandstone. — The beds which I have distinguished by 

 this name generally rest conformably on the Spiti shales, from which, 

 however, they are lithologically very distinct. They are usually 



* The Liassic B. clavatus is doubtful ; and similar Dogger specimens which 

 have been referred to it in Europe are now generally regarded as belonging 

 to different species, though the distinctions have as yet not been satisfactoiily 

 proved. 



