024 Analyses of Books. (Manes, 
in his opinion constitute four orders: 1. Cyclostomes. 2. Selaques, 
or rays and sharks. 3. Esturgeons. 4. Polyodontes. The second 
sub-class he divides into two tribes: 1. Crustodermes, or branchios- 
teges. 2%. Squammodermes, or fishes properly so called, which 
have smaller scales than that of the first tribe ; and these he distri- 
butes into order, 1. Tetrapodes. 2. Dipodes. 3. Apodes. 
On the order sélaques he has written a very good monograph, 
with characters of the genera and their sub-divisions, with an enu- 
meration of the species. The sub-genera in this essay are named 
on the principle of his nomenclature mentioned above. 
Class VI. Cephalopheres, or Cephalopodous and Gasteropodous 
Mollusca. 
As we shall in a future number give a detailed account of his 
arrangement of this and the three following classes, which he has 
written copiously in other parts of the Bulletin des Sciences, we 
shall at present merely give the names of his orders. A. With the 
shell symmetrical. Order, 1. Cryptodibranches. 2. Pteradibranches. 
3. Polybranches. 4. Cyclobranches. 5. Inferobranches. 6. Nu- 
cleobranches. 7. Cervicobranches. 3B. Shell not symmetrical. 
Order, 8. Chismobranches. 9. Pulmobranches. 10. Syphono- 
branches. 11. Monopleurobranches, 
Class VII. Acephalopheres, or Acephalous Mollusca. 
Order, 1. Palliobranches. 2. Lamellibranches. 3. Syphono- 
branches. * Fixed: a. Simple; b. Aggregated. ** Free: 
a. Simple; b. Aggregated. 
‘Class VIII. Polyplaxiphores, or Chitones. 
Class IX. Cirrhipodes, or Barnacles. 
Class X. Hexapodes, or Insectes, properly so called. 
Sub-class, 1. Tetraptéres. Order, 1. Lepidopteres. 2. Coleop- 
teres. 3. Orthopteres. 4. Hemipteres. 5. Neuropteres. 6. Hy- 
menopteres. Sub-class, 2. Diptéres. Sub-class, 3. Apteres. 
Class XI. Octopodes, Arachnides, or Spiders. 
Class XIi. Decapodes, or Crustacea. 
Sub-class, Ll. Aceres. Sub-class, 2. Tetraceres. A. Thoraciques. 
Order, 1. Brachyceres. 2. Macroures. B. Athoraciques. 
Class XIII. Heteiopoda. 
Sub-class, 1. Brachiopoda. 2. Squillares. he first of these 
sub-classes contains a part of the entomoertracea of Muller. The 
second, the genus squilla of authors. 
Class XIV. Tétradécapodes. 
Sub-class, 1. Tetracera. Order, 1. Crevettines. 2. Aselles. 
3. Cloportes. Sub-class, 2, Epizores. The first contains the 
