PEDICELLATA. 343 
Finally, there are some in which the body is equally furnished 
with feet all round(1). 
ORDER II. 
APODA. 
Our second order of the Echinodermata, or the Apoda, com- 
prises but a small number of animals closely related to the Ho- 
lothuriz, but which want the vesicular feet of the preceding 
order. Their body is invested with a coriaceous unarmed skin. 
Several points of their internal structure are not well under- 
stood. In 
Mo.papta, Cuy. 
As in Holothuria, we find a coriaceous body forming a thick cylin- 
der open at both ends, and a tolerably similar internal organization; 
but independently of the want of feet, the mouth is destitute of ten- 
- tacula, and is provided with an apparatus of bony parts, but less 
complicated than that of the Echini. 
(1) Hol. papillosa, Zool. Dan., CVI, 5;—Hol. fusus, tb., X, 5, 6;—Hol. impa- 
tiens, Forsk., Ic., XXXIX,B? Eg. Echin., IX, 6. 
N.B. It is impossible to class the Aol. vittata, Forsk., XXX VIII, E,and the Aol. 
reciprocans, Ib., A, for want of sufficient descriptions. The last is improperly 
_ quoted under inhzrens by Gmelin;—the Hol. maculata, Chamiss., Act. Nat. Cur., 
X, 1, xxv, which closely approaches it, should be particularly examined on account 
of its excessive length;—the Hol. thalia, caudata, denulata, and zonaria are Bi- 
phore;—the Hol. physalus, is the genus Paysatus;—the Hol. spirans, the genus 
Vexrerta;—the Hol. nuda, the genus Porrrra;—the Hol. priapus, the genus 
Priaruta. I suspect the Hol. forcipata, Fab., Gro€én., No. 349, to be a mutilated 
Thalassema. 5 
