54 ON THE GEOGRAPHY OF ANIMALS. 
Scarabus of De Montfort is restricted to certain of the 
Asiatic islands ; while among the slugs, or shelless Tes- 
tacea, the genus Onchidium, as defined by Dr. Buchanan, 
appears to characterise this part of the world. 
(74.) To enumerate the tribes of insects, and of 
the other annulose animals, is altogether impossible. It 
will be sufficient to mention, that the entomology of 
Southern Asia presents us with some few of the most 
common butterflies dispersed over Europe. The Papilio 
Podalirius L., Eurymus Edusa Sw., Cynthia Cardui, and 
Vanessa Atalanta, have been sent from the mountains 
of Nepal, a region, however,— from the peculiarity of its 
productions, — which might more properly be considered 
within the limits of, or at least bordering upon, Central 
Asia. But these, after all, 
are but rare and nearly so- 
litary exceptions to the very 
general dissimilarity between 
the insects of the two con- 
tinents. The entomology of 
Africa assimilates much more 
closely to that of India; 
and the latter contains se- 
veral genera, particularly 
among the lepidopterous in- 
sects, which are precisely 
the same as those of tropical 
America. The Indian is- 
lands, but more especially Amboyna, appear to be 
richer in insects, if we may judge from such as have 
been sent to Europe, than 
the continent. That rare 
and lovely butterfly, the 
Amphrisius Priamus Sw. 
(fig. 17.), with its velvet- 
like wings of intense black 
and rich green, has only 
been received from Amboyna. 
(75.) Most of the marine Crustacea, or crabs, are 
