— 28 - 
A. B. wishing to increase the number of his correspondents in 
all parts, begs all persons who have collections to communicate 
with him , for the purchase or exchange of their duplicates on ad- 
vantageous terms. 
Museums and Scientific Institutions are invited to send him a list 
of their desiderata, which he will undertake to supply in reasonable 
time, even in the case of the rarest animals. 
Professors who require specimens of natural history for study 
preserved in alcohol or ortherwise, can send their instructions 
which will be well attended to. 
A. B. rewinds his friends and naturalists in general, that he has 
now in store 30,000 species of Insects, 2,500 species of Birds, 
Mammals, Reptiles, of Fishes, some Eggs, Shells, Seeds, Bright 
Insect for Jewellers, Florists and Modists, etc., etc., etc., etc. 
Every mouth he receives new Collections from his Travellers 
and Correspondents. 
A. B. is very much interested with Coleoptera from Vaucouver, 
Oregon, California, Sonora, Texas, New England, Mexico, Guate- 
mala, Salvador, Honduras, Costa Rica, Veragua, Nicaragua y Pa- 
nama. He wish to acquire collections from these countries, either 
by exchange or by purchase. 
He thanks sincerely all his friends and correspondents who have 
honoured him with their patronage to the present time, and hopes 
they will continue and help him in the work he has undertaken 
which is to facilitate to all the study of natural History. 
A. B. 
Typ, Gbertiiur et tils, a Rennes. — a Paris, rue des Blancs-Manteaux, 35, 
