CLASSIFICATION OF ANIMALS 261 



Some of the important rules embodied in this code are given below : 



1. The first name proposed for a genus or species prevails, provided 



it was published along with ample description or definition and 

 the principles of binomial nomenclature have been applied. This 

 is known as the law of priority. 



2. The author of a genus or species is the one who first publishes 



the name in connection with the description, definition, or in- 

 dication of the organism referred to, and his name appears in 

 full or abbreviated as a part of the name. An example would 

 be Rana pipiens Schreber. 



3. In citations the generic name of an animal is written with the 



initial letter capitalized, while the initial letter of a species 

 name or sub..pecies name is not. 



4. If a species is transferred to a genus other than its original one, 



or if the name of a genus is changed, the author's name is in- 

 cluded in parentheses. 



5. One species constitutes the type of the genus, it serves as being 



typical for the genus. One genus constitutes the type for a 

 family or a subfamily. The type is indicated by the describer, 

 or, if not, it is done by some other author. 



SUMMARY OF THE CLASSIFICATION OF ANIMALS^^^ 



Below is given a classification of the principal groups of animals 

 from phylum through orders. 



Phylum I. Protozoa (Single-Celled Animals) 



Class I. Mastigophora 



Subclass A. Phytomastigina 



Order 1. Chrysomonadia — Synura uvella 



Order 2. Cryptomonadia — Chilomonas 



Order 3. Dinoflagellata — Ceratium 



Order 4. Euglenoidia — Euglena viridis 



Order 5. Phytomonadia — Volvox glohator ^ 



Subclass B. Zoomastigina 



Order 1. Pantastomatida — Mastigamoeba 



Order 2. Protomonadina — Codosiga (clioanoflagellate) 



Order 3. Polymastigina — Trichomonas 



Order 4. Hypermastigina — Trichonympha campanula 



Class II. Sarcodina (Khizopoda) 



Order 1. Amoebina — Amoeba proteus 

 Order 2. Heliozoa — Actinophrys 



•Modified with permission from Shull. Principles of Animal Biology, published 

 by McGraw-Hill Book Company. 



