LArSE AXD llEUSS JURASSIC FOSSILS. 



23 



formably on the crystalline limestone of the Hiindsheim Hill ; they 

 are slightly vanlted mthin the quarry itself. The skeleton -^as 

 found on the limit between the deepest sand-stratiim exposed and 

 the layer of compact sandstone immediately above it. The ver- 

 tebral column, the ribs, and a considerable portion of other bones, 

 lying in the upper, looser, reddish intermediate stratum, could easily 

 be detached from the matrix. The inner portion of the dorsal spines, 

 the costal arches, itc. were imbedded in compact sandstone. The 

 anterior extremity lay towards the mountain -range, the caudal one 

 towards the Danube. It could not be made out whether the head 

 had been destroyed by former workings in the quarry, or whether it 

 was separated from the body and transported further away before 

 the animal had been drifted to the shore. Tho other fossil remains 

 associated with those of Ralianassa are characteristic of the fauna 

 of the Leithakalk. The Echinoderms among them {Chjpeaster 

 acuminaius, Desh., C. crassicostatus, Ag., and C. Partsclu, Mich.) 

 are also met with in the faunee of Kalksburg, near Vienna, and of 

 Kemenese, in Hungary. Besides these, Plioladomya Alpina, Math., 

 Pecten aduncus, Eichw., Anomice, Ostrece, Xi'.lJij)orce, and a tooth of 

 Listriodon splendens, Myr. (a Mammalian foim particularly cha- 

 racteristic of the marine littoral zone of the Leithakalk), have been 

 determined. The remains of Hcdianassa hitherto found in several 

 contemporary strata of the Vienna basin may, with a certain degree 

 of probability, be regarded as belonging to one species. Fuither 

 investigations must take place before this identity can be asserted 

 as to the Hcdianassa whose remains, according to Prof. Suess, 

 are characteristic of the lower sands, with Centhin.m margari- 

 taceum of Gaudendorf. The geological age of the sands and sand- 

 stones of Linz in which the remains of Halianassa have been 

 found is still uncertain ; and consequently the question whether one 

 or more species of this Cetacean genus lived during the Tertiary 

 period still awaits final decision. [Cor>-T M.] 



On the JrPvASSic Fossils of Balix, Galicia. By Dr. Lafbe and 

 Professor Eeuss. 



[Proceed. Imp. Geol. Inst. Vienna, February and June 1866.] 

 1. Gastcropods, hi/ Dr. Lavhe. — Fifty-two species are at present 

 known to occur in the brown Jurassic strata of Balin, distributed 

 among 21 genera. Of these species, 3 are also found in France, in 

 horizons faUing between the Lower Oxfordian and the " Bajocion'' 

 of French geologists. K'ine species occur hkewise in the Ecglish 

 Jurassic deposits, and S in those of Swabia, the former being assigned 

 by Enghsh geologists to the Inferior and Great Oolite, those of 

 Swabia ascribed by Prof. Quenstedt to the subdivisions d-e of the 

 Brown Jura. It may be inferred, from the coexistence of these 

 species within a single stratum of moderate thickness, that the sub- 

 divisions of " Bajocien '' and *' Bathonicn," as established by M. 

 d'Orbigny, arc not generally applicable. The number of new species 

 from Balin n mounts to 19 : they are: — 



