46 REVIEW. 
fages states that, in arranging his limited groups of Annelids, 
he has endeavoured to take all characters into consideration, 
and not to be exclusively guided by any one special set of 
differentia. 
Cuvier.—ANNELIDDES. Tubicoles. Dorsibranches. |Abranches. 
(Limivora of (Rapacia of (Oligocheta and 
Grube.) Grube.) Discophora of 
Grube.) 
Grube.— Class ANNELIDA. 
LN 
Ord. Appendiculata Polycheta. Gymnocopa. Onychophora. Oligochzta. Discophora. 
(All the marine setigerous (Tomopteris (Peripatus (Harthworms.) (Leeches.) 
worms.) only.) only.) 
Grube divides his Polycheeta thus: 
Rapacia, with the families Aphroditea, Amphinomea, 
Nephtydea, Glycerea, Phyllodocea, Lycoridea, Amytidea, Eu- 
nicea, Ariciea, Syllidea. ; 
Limivora, with the families Chetopterea, Pherusea, 
Maldania, Opheliacea, Telethusa, Terebellacea, Hermellacea, 
Serpulacea. 
M. de Quatrefages’ class Annelida, the relations of which 
to the other groups of his Annelés (Annuloida) may be seen 
by the table at the beginning of this article, is thus divided: 
Order 1. ERRATIC. Order 2. SEDENTARLZE. 
Sub-Order 1. Sub-Order 2. Sub-Order 3. Sub-Order 4. 
Erratice aber- Erratice pro- Sedentarie aber- Sedentarize pro- 
rantes. prize. rantes. prie. 
Fam. Fam. Fam. Fam. 
1. Aphroditea. 1. Eunicea. 1. Chetopterea. 1. Tomopteridea. 
2. Palmyrea. 2. Lwmbrinerea. 2. Clymenea. 
3. Amphinomea, 3. Arenicolea. 
4, Nephtydea. 4, Ophelea. 
5. Nerinea. 5. Aricea. 
6. Cirrhatulea. 6. Leucodorea. 
7. Chloremea. 7. Hermellea. 
8. Nereidea. 8. Pectinairea. 
9. Syllidea. 9. Terebellea. 
10. Hesionea. 10. Serpulea. 
11. Phyllodocea. 
12. Glycerea. 
13. Polyophthalmea. 
This arrangement of the families has much to recommend 
it, although there may be grounds for objection here and 
there. It is infinitely better, in a systematic work, that small 
and numerous groups should be made, than that large and 
roughly defined assemblages of genera should be treated as 
families. M. de Quatrefages has shown great conscientious- — 
