Vol. 50.] GOSATJ BEDS OF THE GOSAU DISTRICT. 135 



Buchi (Kefst.) and Actwonella Renauxiana (d'Orb.) also occur. 

 At the other locality it was found only with innumerable Chemnitzice, 

 in a dark argillaceous marl, with thin layers of coal. The above- 

 mentioned Qhemnitzia Beyrichi is, however, probably not a true 

 Chemnitzia, and strongly resembles the shell described by Stoliczka 

 as Melania granidato-cineta. 



Cephalopoda are rare in the Gosau district, the majority of the 

 species described being from other localities. Brachiopods also are 

 of extremely local occurrence ; the following, however, occur in 

 the Eussbachthal, on the Traunwand : — 



Terebratula biplicata (Sow.). 

 Terebratulina gracilis (SchL). 

 Waldhrimia tamarindus (Sow.). 

 Bhynchonella compressa (Lam.). 

 Thecidium ? WethereMi (Dav.). 



Moreover Thecidium ornatum (Suess) and Crania ? sp. occur in 

 the Hofergraben. Prom other localities we get : — 



Terebratula biplicata (Sow.). Abtenau and Piesting. 

 Terebratulina striata (Wahlb.). Near Piesting. 

 Waldheimia tamarindus (Sow.). Abtenau. 

 Rhynchonella compressa (Lam.). Griinbach. 



Out of the 140 species of corals, described by Reuss, only 29 occur 

 in other besides the Gosau Beds. The genus Gyclolites is extremely 

 common throughout, especially the species O. hemispTicerica and 

 C. discoidea. Amongst other very common and characteristic forms 

 we may mention Trochosmilia eomplanata (E. & H.), the genus Astro- 

 camia, and Montlivaltia rudis. 



Of the lamellibranchs, of course the Rudistce are extremely 

 characteristic and numerous; the following species are known from 

 the Gosau Beds : — 



Radiolites Mortoni (Mant.). 

 Spharulites angeiodes (Pic. de Lap.). 



styriacus (Zitt.). 



Flagiopti/chus (Caprina) Aquilloni 

 (d'Orb.). 



Hippurites cornu-vaccinum (Bronn). 



sidcatns (Def'r.). 



Toucasianus (d'Orb.). 



dilatatus (Defr.). 



exaratus (Zitt.). 



organisans (Montf.). 



Amongst the others, Janira (Neithea) quadricostata (Sow.), 

 Panopcea frequens (Zitt.), and Cardium <productum (Sow.) are ex- 

 tremely common. CucuUcea chiemiensis (Giimb.), Crassatella macro- 

 donta (Sow.), and Inoceramus Cripsi (Mant.) are also common, and 

 appear rather to characterize the upper portion of the fossiliferous 

 marls. 



I did not find Cardium (Protocardia) hillanum (Sow.), Trigonia 

 limbata (d'Orb.), or Pectunculus Marrotianus (d'Orb.), which are also 

 fairly characteristic forms, the latter two being common in the Hofer- 

 graben, and the Pectunculus also in the Wegscheidgraben. The fol- 

 lowing freshwater bivalves occur in the Estuarine series : — 



Cyclas gregaria (Zitt.) St. Wolfgang, Neue Welt, Neue Alp. 



amfjigua (Zitt.) „ „ 



Cyrena solitaria (Zitt.) Neue Alp. 



Unio cretaceus (Zitt.) St. Wolfgang, Griinbach. 



