ANNELIDA. 
597 
C. gaymardij p. 539, pi. 16 bis. fig. 13 ; C. morchii, p. 640, pi. 16 bis. figs. 14- 
17, New Holland ; C. mcffasoma, p. 641, Brazil; C. ruhus, p. 642, Bahia; C. 
incompleta^ p. 643, New Zealand. 
ANNELIDA OLIGOCHiETA. 
D^Udekem (/. c. p. 11), rejecting the classification which he 
proposed in 1858 for this group of Annelids, adopts in its inte- 
grity that proposed by himself in 1855. The order is first divided 
into two suborders, the gemmiparous and the non-gemmiparous. 
The latter live cither in the earth or mud, are unable to swim 
or to follow after tlieir prey, taking in for their nourishment 
damp earth filled with animal and vegetable matters ; they are 
unwieldy in shape, of fair size, and their skin is more or less 
firm. The former, on the contrary, are charming little worms, 
slender and elegant, of small size, often microscopic, living in 
running or stagnant water, seldom marine, able to swim, and 
capable of darting after their prey and leading a vagabond life. 
The Gemmipari have their organs of generation developed only 
at certain periods; the non-Gemmipari have them always. 
The latter group, as will be known to readers of M. D^Udekem^s 
writings, is divided into three families, according to the dif- 
ferences in their eggs. The Gemmipari have but a single family. 
Lumbricina. 
Lumhricus. The following known species are described by D’Udekem ; — L. 
agricola^ Ilofiin. (1. c. p. 36, pi. 1. fig. 1) ; communis, IloflVn. (p. 36 — bristles, 
pi. 4. fig. 6) ; L. ruhcllus, Ilofim. (p. 39) ; L. riparius, Ilollm. (p. 39, pi. 4. 
figs. 4, 6) ; L. oUdus, Hofthi. (p. 40, pi. 4. figs. 1-3); L. stagnalis, Ilolfm. 
(p. 41); L. pieter, Hoffm. (p. 41) ; L. agilis, Hoftin. (p. 42). The anatomy 
of the genus is also described and illustrated in this paper. All the above 
species are found in the neighbourhood of Brussels. 
Kinberg (1. c. p. 97) gives the following table of genera belonging to this 
family ; — 
I. Setae, junioribus exceptis, segment! cuj usque 6 . . . . Tritogenia, g. u. 
II. Setae, junioribus exceptis, segm. cuj usque 8, 
A. Ubique bince, approximate. 
1. Tubcrcula ventralia utrinquo singula Lumhrmis (Linn.), 
2. Tuberc. ventr. utrinquo bina Mundane *, g. n. 
B. In annulis anterioribus alternantes ... Geogenia, g. n. 
C. Anteriores bine approximate, posteriores distantes. 
1. Segmentum buccale non elongatum Alyattes, g. n. 
2. Segm. buccale elongatum Eurydame, g. n. 
D. Ubique gemine et distantes Hypogcon (Sav.). 
E. Anteriores dorsuales distantes, ventrales approximate ; posteriores di- 
stantes Jlegesipyle, 
III. Sete, junioribus exceptis, segmenti cujusque pl^res quam 8. 
A. Posteriores anterioribus plures. 
* This name was previously used by the author himself for a genus of 
Aonidea ! (see p. 683). 
