696 EXTERNAL ANATOMY OF INSECTS. 
base, both within and without, by triangular, conical, or 
subglobose props. With regard to the use of these organs, 
it has not been clearly ascertained. Amouroux states 
that he has seen the animals use them as feet, and he con- 
jectures that by them they may fix themselves and turn 
upon them as on a pivot, when they have to make a re= | 
trograde movement*. M. Latreille, from their having 
branchial pouches immediately under them, seems to 
think that they are connected with respiration’. This 
may be true; but from the suckers just described, I am 
inclined to think with Amouroux, that they are useful to 
the animal in its motions, and that like the suckers of the 
Gecko, flies, &c., they enable it to support itself against 
gravity and to climb perpendicular surfaces. 
Whether the five obtriangular plates, elevated on a 
pedicle, which are found arranged in a series on the un- 
der side of each of the jointed coxe of the posterior legs 
in Galeodes, are at all analogous to the pectens of scor- 
pions; has not been ascertained*. M. Leon Dufour 
watched them very attentively in one species (G. intrepi- 
dus), but he could observe no motion in them 4. 
Iam, &c. 
* Amouroux Insectes Venimeur, 44. 
& Observations Nouvelles, &c. Mém. du Mus. viii. 177. 
© N. Dict. d’ Hist. Nat. xii. 370. 
4 Descr. de six Arachnides, &c. Annales Gen. des Scienc. Phys. 
1820. 19. ¢. Ixix. f. 7. d. 
he 
