116 Notice of a Double Fish. 
trace of verdure above ground; while C. formosa protrudes new 
leaves and flowers in continual succession till it is checked by autum- 
nal frosts. 
It appears then that these two plants are very dissimilar in their 
roots, in their petioles, in their leaves, in their racemes, and in their 
temperaments ; and if these differences are permanent, which I have 
seen no reason to doubt, they must be very distinct species. 
Art. XX.—WNotice of a Double fish; by Syt. CuurcHitt. | 
Tue annexed drawing represents a pair of cat-fish, (a species of 
Silurus? L.) which were taken alive in a shrimp net, at the mouth 
of Cape Fear river, near Fort Johnston, N. C., in August, 1833, 
and presented to Professor Silliman. One of them is three and a 
half, the other two and a half inches long, including the tail,—the 
smallest, emaciated and of sickly appearance. ‘They are connected 
in the manner of the Siamese twins, by the skin at the breast, which 
is marked by a dark streak, at the line of union. The texture and 
color otherwise, of this skin is the same as that of the belly. The 
mouth, viscera, &c., were entire and perfect in each fish, but, on 
withdrawing the entrails, through an incision made on one side of 
