604 Corrosive Quality of earthy Substa?ices. 



Abraxas grossulariata. Hyd. potamogata. 



Xerene procellata. nymphaeata. 



Lozogramma petraria. lemnata. 



Chesias spartiata. Botys forficalis. 



Cheimatobia vulgaris. urticata. 



rupicapraria. Margaritia verticalis. 



Bapta punctata. limbalis. 



Strenia clathrata. Tortrix viridana. 



Venilla macularia. Crambus margaritellus. 



Poecilophasia marginata. Adela viridella. 



Timandra Iraitaria. DeGeerella. 



Cilix compressa. Yponoraeuta Padella. 



Hypena proboscidalis. Pterophorus pentadactylus. 



Pyralis farinalis. furcodactylus. 



Agrotera costalis. Alucita hexadactyla. 

 Hydrocampa sambucata. 



Witham, Oct. 3. 1837. 



SHORT COMMUNICATIONS, SCIENTIFIC 

 INTELLIGENCE, ETC. 



CORROSIVE Quality of earthy Substances. — M. C. Moritz, a 

 German, who is now travelling in the north of South America, 

 and whose letters are now successively publishing in the 

 Berlmische Nachrichten, passed near Guigue, over tracts from 

 which the lake has retired, the former extent of it being in- 

 dicated by strata of little petrified fresh-water shells of the 

 same species, which are still living in the lake. The dust 

 which arises from the pulverisation of these shell-beds has a 

 corrosive quality, and, when brought into contact with the 

 human skin, causes a very disagreeable burning sensation, 

 from which M. Moritz had much to suffer, and which he as- 

 cribes to the remains of the helicites. , The inhabitants of the 

 district use to say, El arena de la laguna pica. It appears, 

 however, that this quality of the dust is to be accounted for 

 by the admixture of saline particles, as M. Michel Chevalier 

 was annoyed in the same manner, in 1835, when travelling in 

 Mexico over those beds of ancient lakes, which, by the lace- 

 ration of their high banks through earthquakes, have been 

 changed into dry savannahs. These lakes appear to have 

 been salt, as there are many extensive deposits of rock-salt, 

 and as the ground is, in many places, so impregnated with 

 muriate of soda, that it is altogether unfit for cultivation. — 

 W. Weissenborn. Weimar, July, 1837. 



Objections to the Nomenclature employed by Mr. Ogilby. — 

 I beg to make a few remarks on the nomenclature adopted 

 by Mr. Ogilby in his excellent paper on the Cheir6poda in 



