M. A. de Quatrefages on the Classification of the Annelides. 23 
b. Caudal eyes. 
1. Antenne present. 
Vib COLE: “sarees s nina en acare ee ee 
Wiathnowollutiens: necence ees net i 38 
Se No antennba ia oeednts-¢ eos Sones 5 ee haa 
Sebranchial cirri umibedess saws ae 66s 5 
+ Branchize with a spiral base. 
a. A single bvanchia in ee Bar ere rerceas eens 6 
8. Both branchie in Spiral ys’ sgaree e oba 7 
~b. Tube calcareous. 
* Branchise with a spiral base ............ 8 
+ Branchize with a circular base............ 
B. Regions indistinct (Tribe S. Heterosabellea). 
a. With feet. 
* Branchial cirri free. 
EN NELE WaT DIES sit) .minlore alts slat siahelsraera's axe 10 
GraNio ar Dulegitia cae gta in clskoveat o arate sie 11 
jebranchial Cirm UNILed +c occa ee cee cece « 1 
b. Without feet. 
* Branchis with barbules .......+..-..-+ 1d. 
+ Branchiwe without barbules.............. 14, 
II. Head with an operculum (Tribe Serpadea prop.). 
A. Two or more false opercula 
B. With true opercula. 
a. Tube completely rolled up 
b. Tube more or less sinuous. 
* Two symmetrical opercula 
+ One operculum. 
See AGG 2. ayenp axes) tarp anengaared | 
B. Tube attached. 
a. Branchiz with a circular base. 
9, Minis seule Be oes) eats 
TE, Operculum corneous 3....2..2.+.: 19 
2. Operculum corneo-calcareous...... 20. 
b. Branchiz with a spiral base ........ 21. 
Oria. 
. Amphiglena. 
. Fabricia. 
. Chonea. 
. Spirographa. 
. Distylia. 
. Protula. 
9. Psygmobranchus. 
. Anamebea 
. Amphicorine. 
2. Myxicola. 
Gymnosoma. 
Phorons. 
5, Filigrana. 
. Spiror bis. 
. Codonytes. 
. Ditrupa. 
. Serpula. 
Vermilia. 
Cymospira. 
GENERA INCERT# SEDIS 5: Spiramella, Apomatus, Spiroglypha, 
Stoa, Vermiculum. 
Class GEPHYREA. 
(2 Orders, 7 Families.) 
Deod ybearine: hetay ty: Fis Sais ss he aor cetera as 
A. Several anterior bundles 
B. Two simple anterior sete. 
a. With posterior sete. ..... 6s. cece cece eens 
b. No posterior BOtCO eee ee ie ae ee 
II. Body not bearing setze 
A. Anus terminal. 
a. With external posterior branchiw.......... 
b. No external posterior branchie 
B. Anus dorsal. 
a. Scutes present 
b. No scutes 
Deo Dace (AON Ceo cei rec 
a} (8) (Bau (e/teueie) @46) sib” @ 16)(e) 60 66), b 1a 
Oe) 0 Cerca Ono .r] 
aie 6 3 hia) A) eo) abbot a, Gls) a) whe hh se) ate we) e 
Order I, G. ARMATA. 
1. Sternaspidea. 
2, Echiurea. 
3. Bonellea. 
4, Priapulea. 
5. Lovosiphonea. 
6. Aspidosiphonea. 
7. Stpunculea. 
Family I. Sternaspidea (genus Sternaspis). 
Family I]. Echiurea (genus Hehiurus). 
