468 Bihliographical Notice. 



ditions and methods of fossilization of tlae hard parts of plants and 

 animals ; also on the " geological record " and the use of fossils to 

 the Geologist. 



1. Of th.e Protozoa, the Ehizopoda are here mainly represented hy 

 the Foraminifera. As with the other groups, a short account of the 

 general structure and features precedes that of the subgroups. A 

 careful note on Eozoon is given at 'page 21, and the Radlolaria are 

 also referred to. 



2. Of the Forifera, the notes on the several orders and their distri- 

 bution are concise and clear. 



3. Of the Coelenterata, the Hijdrozoa are interesting as comprising 

 the Graptolites, and, with the Actinozoa, are treated, both as to 

 structure and distribution, as fully as limits permit. 



4. The Echinoderntata, including Asteroids, Ophiuroids, Echinoids, 

 Crinoids, Cystids, and Blastoids, have their structure, relationships, 

 and distribution represented to the student in succinct but useful 

 notes, such as he would gladly have in his notebook when studying 

 the indicated fossils. 



5. Of the Vermes very few fossil representatives are here noted. 

 The annelidan jaws found in palceozoic (and mesozoic) strata are 

 alluded to. 



6. The Poh/zon and BracMopoda of the Molluscoidea receive their 

 proportionate share of attention. 



7. The Molh'sca (Lamellibranchs, Gasteropods, Scaphopods, and 

 Cephalopods) have necessarily most attention, being the most nume- 

 rous and commonly useful kinds of fossils. The bathymetrical 

 distribution of the recent groups and the distribution in time of the 

 fossil forms are indicated with some precision ; but space did not 

 admit of the modern divisions and subdivisions of the Ammouoid 

 and other Cephalopods. 



8. The very extensive subkingdom of the ArtlirojMda or Articit- 

 laia, though cAidently appreciated, are provided with very limited 

 accommodation in this little book. The Trihhita (one of the 

 " groups of doubtful position "') are more fully enumerated than the 

 others, of which few genera are taken as tj-pes for the student. 



" A list of some important palreontological works " is given as an 

 appendix, a few " general," and others special for each group of 

 Invertebrata, but necessarily, though numerous, far from all that a 

 real student would have to use. The Index of group-names and 

 genera will be found useful as far as it goes. 



In the text are fifty-six illustrations, especially of the structure 

 of the organisms, showing the names of parts concerned ; but very 

 few generic forms are figured, the learner being supposed to have 

 recourse to a collection of the fossils themselves. 



"We object to the propagandism of the vicious style of nomen- 

 clature here affected — for instance, one of the oldest and best-known 

 specific names given by Linne is printed here as Rotalia " heccari," 

 instead of the authoi'ized Beccarii ; the latter being the genitive of 

 the only Latinized form that Dr. Giacomo Bartolomeo Beccaki's 



