402 
CLASS ARACHNIDA. 
tory, has discovered, in the environs of Philadelphia, another 
species (. Atypus rufipes) altogether black, with the feet fawn- 
coloured. 
Eriodon, Lair . Missulena, WalcL, 
Differ from the atypi, in their elongated and narrow tongue 
advancing between the jaws, and their eyes scattered on the 
front of the thorax. 
The only known species ( Eriodon occatorins , Latr, ; Mism- 
lena , Walck. Tab. des Aran. pi. ii. 11, 12), is an inch long, 
blackish, and proper to New Holland, from which it has been 
brought by Peron and Lesueur. 
Our second and last division of my gales, or araneides with 
four pulmonary sacs, presents characters common to eriodon, 
as that of having the tongue prolonged betw een the jaws, the 
palpi composed of five articulations ; blit the claws of the 
forceps are bent along their internal edge ; their spinnerets are 
six in number ; the first pair of feet, and not the fourth, is the 
longest of all ; the third is always the shortest. Some of these 
arachnides have but six eyes. The number of pulmonary sacs 
will not permit us to remove the subgenera of this division 
from the preceding ; and as it conducts us to drassus , to clothQ , 
to segesiria , subgenera presenting only tw o pulmonary sacs, 
the natural order will not permit us to pass from the mygales 
to the lycosae and other hunting or erratic araneides. The 
mygales are genuine weaving spiders ; and, in truth, it was in 
this division that the avicularia of Linnaeus was originally 
placed. 
This second division comprehends the two following sub- 
genera, 
Dysdera, Latr., 
Which have but six eyes, arranged in the form of a horse- 
shoe, w r ith the aperture in front ; whose forceps are very strong 
