HISTOEIOAL COLLECTIONS. 



83 



Among numerous other groups which cannot be mentioned 

 great interest attaches to the Trilobites (fig. 57) of the Palfeozoic 

 epoch. These creatures are related to the King- Crabs of the 

 Moluccas, and both have affinity with the Scorpions. 



Very extensive is the collection of Fossil Plants from the 

 Coal-Measures, among which Lepidodendron and Sigillaria, 

 as well as numerous kinds of fern-like leaves, are among the 

 most common. 



The fifth gallery is set apart for the reception of certain 



FiS. 51. — UpPBB (A) AND LOWEE (B) StntPAOES OF Pteeiobthts, 

 AN AKMOtlBBD DEVONIAN FiSH. 



special collections of historical interest, either from the circum- Historical 

 stances under which they were formed or came into possession " *" ^°^' 

 of the Museum, or from their containing a large number of type 

 specimens described and figured in various publications. Hence 

 it has been considered undesirable to break up and disperse 

 these among the general collection. They include the original 

 collection formed by William Smith, the pioneer of geology in 

 this country, the Searles Wood Collection of Crag MoUusca, 

 the Edwards Collection of Eocene Mollusca, the Davidson 



G 2 



