A LIST OF THE GENERA AND FAMILIES OF MAMMALS. 33 
List of Homonyms within the Class Mammalia—Continued. 





Original name. Subsequent name. 
Rhinaster Wagler, 1830. ............. Insectivora | Rhinaster Gray, 1862.................. Ungulata 
Rhinogale Gloger, 1841............... Mustelidee | Mn ogale Gray 1804-7 See eee a clan at Viverridze 
Rhynophylia Peters, 1865......Phyllostomatid: | Rhynophylla Gray, 1866.......... Rhinolophide 
Rhynchocyon Peters, 1847............ Inseetivora | Rhynchocyon Gistel, 1848. ............ Chiroptera 
| Satyrus Oken, 1816 (gibbon)............ Simiidz | Satyrus Lesson, 1840 (orang) ........... Simiid:e 
| Sauro-cetus IAP ASSIZ 5 1848 ooo ee ae Basilosaurid:z | Sawrocetes Burmeister, 1871 ........ Platanistide 
Schizodon Waterhouse, 1842 .............. Glires | Schizodon Stutehbury, 1853......... Marsupialia 
SELIG eM CUVICL WOOO 2. cetera we aterm ini = Tenrecide | Setiger Geoffroy, 1803............... Erinaceide 
Stenodon Van Beneden, 1865 ............... Cete | Stenodon Ameghino, 1885............. Edentata 
Sylvanus Rafinesque, 1815............... Cebidee | Sylvanus Oken, 1816 ............ Cercopithecid:ze 
WMirey l1819/5552c--05-. Cercopithecidz 
Sylvicola Blainville, 1837 ............ Chiroptera) | Sylzcola Ratio; 1867 22-2 e eren Glires 
Talpasorex Schinz, 1821 (=Condylura) .Talpidee | Talpasorex Lesson, 1827 (—Sealops) ....Talpidze 
Tapirotherium Blainville, 1817 .. Lophiodontid: | Tapirotherium Lartet, 1851................ Suidee 
Tardigradus Brisson, 1762.......--.--- Edentata | Tardigradus Boddaert, 1785 ........... Primates 
Thinotherium Cope, 1870 ....-..-.-2 Artiodactyla? | Thinotherium Marsh, 1872......... Condylarthra 
Thylacomys Owen, 1840............. Marsupialia | Thylacomys Waite, 1898. .................. Glires 
Thylacotherium Valenciennes, 1838. Thylacotherium Lund, 1839 ........ Didelphyidze 
Amphitheriidee 
Tragelaphus Blainville, 1816 ............ Bovide | Tragelaphus Ogilby, 1837...........-.--- Bovidse 
TraqgubisBrssony1/02.--—-———-—-—. Mraculidess|) Traguias Hc; smith, 1827.-------25---—-. Bovidze 
Trichechus Linneus, 1758.......--------- Sirenia | Trichechus Linneeus, 1766 -.-..-....-......- Fere 
(mursio Eleming, 1822) -------.-.---7 Physeteride | Tursio Wagler, 1830 ................ Delphinidzé 
| Gray IOtsty Me Me Aaa Delphinidze 
| 



Besides this duplication within the class Mammalia, many more names 
have been proposed which have been previously used in other classes, so 
that the total number of preoccupied names constitutes a very appre- 
ciable percentage of the total number of generic names. Canon 
XXXIII of the A. O. U. Code declares that ‘‘a generic name is to 
be changed which has been previously used for some other genus in 
the same kingdom." Simple as this statement is, it has probably 
given rise to more discussion and to more changes of names than 
any other rule in the Code, merely because of differences in its 
interpretation. 
In the acceptance and use of names some zoologists disregard the 
rule entirely, but of those that recognize its validity some apply it 
only to names previously used in the same class, others only to names 
which are identical in spelling, and still others to names derived from 
the same roots. "The first of these interpretations 1s obviously out of 
accord with the rule. The second is perhaps open to question, but 
the test being merely identity of spelling there can be no difficulty in 
its application, even in the rare cases of names of the same form but 
of different meanings, due to different derivations, as, for example, 
Neomys Kaup, 1829 (véc, to swim; 40s, mouse), and /Veomys Gray, 
1873 (véos; new, vs, mouse). The chief differences in opinion have 
arisen in the application of the last class of interpretations, which 
includes names of the same derivation, but with slight differences in 
form due to gender, choice of connecting vowel of compound words, 
7591—No. 23—03——3 
