M. A. de Quatrefages on the Classification of the Annelides. 19 
Family X. Nereidea (2 tribes, 4 genera). 
I. Body forming one region (Tribe Neretdea prop.). 
A. Feet uniramose 
B. Feet biramose 
II. Body forming two regions (ibe Heteronereidea). 
A. All the sete like those OLIVET eISNa eee nan 
B. Part or the whole of the setze reniform 
Ce 
GENERA INCERTZ SEDIS 2 
Ub 
2. 
3. 
4, 
Family XI. Syllidea (31 genera). 
I, Feet moveable. 
A. With dorsal and abdominal cirri. 
a. No tubercles on the body. 
* Gizzard armed. 
a. 4 antenne. 
a. 12 tentacles 
6. No tentacles 
B. 3 antennee 
+ Gizzard unarmed. 
a. Head and buccal segment distinct. 
a. With frontal lobes. 
#** Antenne 5 
+T Antennee 4. 
§§ Antenne 3. 
1. Tentacles 8 
2. Tentacles 4. 
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Ce 
CC 
3. Tentacles 0 
ie RCM Set Seas Leese st eee 
b. No frontal lobes. 
#* Antennee 4, 
1. Tentacles 16 
2. Tentacles 0 
++ Antenne 3. 
1. Tentacles 4. 
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2. Tentacles 2° 
3, BR GrTLClesiO): 8 tan were atte shee one 
B. Head and buccal ségment confounded. ' 
a. With frontal lobes. 
** 3 antenne and 4 tentacles determi- 
CACO ORG LO.ONCO, CeO memo o OO 
MLD] Oye ave ater Sastnnie seers. ele esunters 
She hy aarbran 
++ Antenne and tentacles ws'| 6 wre ateuaia a 
indeterminable 1: A osch eaten 
9 
b. No frontal lobes; antennee (7........ 
and ‘tentacles indeter- 45........ 
minable ! Onctedeiss2 
b. With tubercles on the body ...........+. 
B. No abdominal cirri. 
as With frontalilobés Fics fer Pisces badiae ce: 
* 
Lycastis. 
Nereis. 
Nercilepas. 
ITeteronereis. 
: Micronereis, Zothea. 
. Syllidia. 
. Prionognathus. 
. Gnathosyllis, 
. Pterosyllis. 
. Brana. 
. Procoma. 
Syilis. 
. Ehlersia. 
. Exogone. 
. Grubea. 
. Kefersteinia. 
. Lucerastes. 
- Autolytus. 
. Trichosyllis. 
. Heterosyllis. 
. Gossia. 
17. Claparedia. 
. Cystonereis. 
. Spherosyllis. 
. Oophylax. 
. Tsosyllis. 
. Thylaciphora. 
3. Ambhosyllis. 
. Tetraglena. 
. Lurysyllis. 
», Sylline. 
Ox 
