BRONN ON PAL^ONTO LOGICAL STATICS. 51 



scyphia from Franconia and Swabia, and Miinster has left to the 

 Baireuth collection 130 species of polyparia, with 67 scyphia from 

 Franconia. All these remains are derived from the coral limestone, 

 a rock-section, which corresponds neither to the whole of n^ nor yet 

 to a complete ' life of a species,' nor yet can have formed the only 

 kind of rock of this time, since the following deposit nearly coincides 

 with it. 



n^. One of the most important fossil localities is the Solenhofen 

 deposit, because it, though well-characterized in regard to its posi- 

 tion, is 3^et so peculiar in its organic remains, that it must be regarded 

 in its whole extent and thickness (Solenhofen, Kehlheim, Pappen- 

 heim, Aichstedt) as merely a local facies of another rock-formation, 

 and as the produce of less than one *life of a species' (n^), during 

 which, except the gradual filling-up of the sea-bottom, scarcely any 

 geological change has taken place. This localit}'^ furnishes besides 

 many conchylise, which also occur in n^ in other localities : 



Genera. Species. 



Marine Algse 8 29 



Sepise 4 32 



Hexapod insects, including 10 Libellulinse. .12 27 



Crustacea : Decapods 26 100 



Limulinse 1 6 



Fishes (Ganoids with 4 Elasmobranchii) . . 22 94 



Reptiles (Chelonians and Saurians) 13 27 



So great richness of various plants and animals of these divisions 

 could scarcely be collected in any region of the sea within a few 

 square leagues ; not only are the marine Algse abundant, but also 

 the Sepiae, which are derived entirely from the genera furnished with 

 a shell {Schulpe), along with which shell-less species may also have 

 existed ; Nice has only 1 2 genera with 22 living species, including 

 both those with and without a shell; 10 Libellulinse, as representa- 

 tives of the hexapod insects, would, in any local European fauna, form 

 a considerable amount, and the larger species indicate a multitude of 

 other flying insects. Six Limulinse are as many as occur in the whole 

 existing creation. Nowhere have the marine Crustacea been so care- 

 fully collected for a long time as at Nice, where Verany cannot count 

 above 72 (much-divided) genera with 108 species, among which are 

 44 genera with 72 species of decapods. It may enable us to judge 

 of the importance of such a number as 94 species of fish, to observe 

 that Risso could not bring together from the seas of Nice during 

 many years, taking advantage of all seasons and with the assistance of 

 fishermen, from the most different localities and depths, which are 

 entirely wanting at Solenhofen, more than 105 genera with 310 spe- 

 cies of marine fish of all orders. Finally, the whole of Europe would 

 at present scarcely furnish 13 genera with 27 species of Chelonians 

 and Saurians. 



p. A similar relation prevails in the confined freshwater deposits 

 of the North-German and English Wealden formation, into which 



