ANNELIDA. 
721 
* Posterior region with only imcini 9. Anciatria. 
b. Head club-shaped 10. Clymenia. 
Genera inoertai; sedis 3 : Capitdla^ Notomastus, Dasyhranchus. 
Family XIX. APENICOLEA (2 genera). 
I. Branchiferous feet consecutive 1. Arenicola. 
II. Branchiferous feet separated by abranchiate ones . 2. Chorizohranchus, 
Genera incertas sedis 2 : Scalihrcgma, Polyphysia, 
Family XX. OPHELIEA (3 genera). 
I. Feet with a single branchia. 
A. On the middle region 1. Ophelia. 
B. Nearly on the whole body 2. Travisia. 
II. Feet with several branchise 3. Branchoscohx. 
Genera iNCERXiE sedis 3 : Ophelina, Ammotripane^ Sclerocheilus. 
Family XXI. ARICIEA (6 genera). 
I. Trunk of ordinary form. 
A. I^ower ramus of anterior feet bearing uncini. 
a. No antennm 1. Aricia. 
b. With antennm 2. Orhinia. 
B. Low^er ramus of anterior feet wdth simple setie. 
a. No caruncle 3. Scoloplos. 
b. Caruncle present 4. Porcia. 
II. Trunk divided into foliaceous lobes 6. Anthostomum. 
Genera incerta<! sedis 4: Magclona, Gisela, Theodisca, Hermandura. 
Family XXII. LEUCODOREA (5 genera). 
I. Feet different. 
A. Feet biramose. 
a. Branchiae superior 1. Leucodore. 
b. Branchiae inferior. 
* Third somite abnormal 2. Disoma. 
* Fifth somite abnormal 3. Polydora. 
B. Feet uniramose A Spionc. 
II. Feet similar 6. Sjnophancs. 
Genus incertae sedis : Sp)io. ' 
Family XXIII. HERMELLEA (3 genera). 
I. Body in 3 regions. 
A. Operculum with 3 ranges of setae 1. Hermella. 
B. Operculum with 2 ranges of setae 2. Pallasia. 
II. Body in 2 regions 3. Centrocorone. 
, Genera iNCERTiE sedis 2 : Branchiosahclla, Uncinocheta. 
Family XXIV. PECTINAREA (2 genera). 
I. Branchiae 2 pairs 1. Pectmaria, 
II. Branchiae 3 pairs 2. Scalis. 
Family XXV. TEREBELLEA (3 tribes, 11 genera). 
, I. Bodj’ in 2 regions {Ter ehdlca prop 
18G5. [voL. II.] 3 a 
