140 
ANNELIDES. 
A large species is found at the Antilles which inhabits a tube 
of the consistence of leather ♦. 
This is the only situation we can assign to a new and very singu- 
lar genus which I call 
ClIJiTOPTERUS, CuV. 
The mouth has neither jaws nor proboscis, and is furnished above 
with a lip, to which are attached two tentacula. Next comes a disk 
with nine pairs of feet, followed by a pair of long silky fasciculi re- 
sembling wings. The lamellated branchiae are rather beneath the 
body than above it, and extends along its middle. 
Ch(vtc>pterm p erg amenta ceus, Cuv. This species, which is 
found at the Antilles, is from eight to ten inches in length, and 
inliabits a tube resembling parchment j-. 
ORDER III. 
ABRANCHIATE. 
Tlie Abranchiatse have no apparent external organ of respiration 
whatever, and appear to respire, some, like the Lumbrici, by the en- 
tire surface of the skin, and others, like the Hirudines, by internal 
cavities. They have a closed circulating system, usually filled with 
red blood, and, like all the Annelides, a knotted nervous cordj. 
Some arc also iwovidcd with setae, which enable them to crawl, and 
others are deprived of them. This has caused their division into two 
families. 
* N.B. The Phi/Uodnce maxiTlosa of Ranzani, called Polyodontk by Reiuieri, 
and Eimolpe maxima by Oben, seems to be closely allied to the Acoetes ; its pro- 
boscis and jaws are the same, and neither of the genera has, perhaps, been described 
from perfect specimens. 
There remain various Annelides so imperfectly described, that we are unable to 
characterize them well; such are the Nereis ctera, Fahr., Soc. Hist. Nat. Copen. 
partT, pi. iv, f. 24 — 28; — N. hmga, Id., Ib., f. 11 — 13; — N. uphrodil aides, Ib., 
“1 — >; Ib., 11 — 13; — Branchiarius (piadrangututHS, Montag. Lin. Trans., XII, pi. 
xiv, f. 5 ; — Diplofes hgalina, Id., Ib., f. 6 and 7 ; and the pretended Ilirudo hran- 
rhiata, Archil). Menzies, Lin. Trans. I, pi. xvii, f. 3. I have also omitted the 
Mykian.e and two or three ether genera of M. Savigny, on account of my having 
had no opportunity to re-examine them. 
t It will he more minutely described by Messrs. And., and Cuv., in the Annales 
des Sciences Naturclles. 
X For the anatomy and physiology of the abranchiate Annelides, see the Memoir 
of M, Ant. Duges, Annales des Sciences Naturelles, Sept. 1828 . 
