184 INDEX GENERUM MAMMALIUM. 
COMPARISONS. 
To show more clearly how this classification differs from that of other 
recent works, comparisons may be made with the classifications given 
in Flower and Lydekker's ‘Mammals Living and Extinct,’ pp. 88-92, 
1891; Trouessart’s * Catalogus Mammalium, I, pp. v-vi; II, pp. iii-v, 
1897-99, and Beddard's ‘Mammalia,’ pp: ix-xii, 1902. Briefly stated, 
a number of family names will be found in this list which do not occur 
in the works just mentioned, while 10 of those given by Flower and 
Lydekker, 7 of those given by Trouessart, and 7 of those given by 
Beddard are not here recognized. In all cases, however, the genera 
belonging to the groups in question will be found under other families. 
It is interesting to note that of these 24 family names, which form 12 
per cent of the total number recognized, only one is common to two of 
the works of reference just cited. The families not accorded recog- 
nition are as follows: 
Table showing some of the Families not recognized in this Index. 



Orders. | Flower oT dekker, | pyouessart, 1897-1899. |  Beddard, 1902. 
| 891. | 
Allotheria....... | Polymastodontidze = Polymastodontide ...| 
Cote. si. hace sece dl Sees estes sso scecse metic las omceenioesecemec ITE Baleenopteride. 
Creddontas. fase. sees ee EI eee ae IMincidips cec 
| sWGenita tapes sone sesec nccemetsce es eeeeee (ional Soe eeeeesoase-al ML ylodontide: 
| | Peltephilide ......... 
| Pere eee ete [ocers erste eric ee eie e © Ibo cue CT ce Meg Remar OENS Machaerodontide. 
ek Gyires.scecrP lem EK wc usc NR CRM c Aim Seas Fae | Ctenodactylide. 
Inseetivora...... lesse -io eec meses SEE iNeerolestide--------- 
Marsupialia ..... | Nototheriide......... 
Spalacotheriidze...... | 
Monotbremaiu t ce M Dideilotheriidz ...... 
Primates ........ ENSE. Pe meee E | Nyeticebide.......... Chriacide. 
Tillodontia...... | Calamodontidz ...... 
Ungulaig.-:.-...|5e2-5- v. sme meseebcrlezex-- egest coma | Caenotheriide. 
Chceropotomide ..... | | 
Dichodontide........ 
Lambdotheriide ..... 
Merycopotamide..... 
Periptychidz......... | | 
Poebrotheriidze....... | 
Oya eee eee EE ce Byrothenide= 2 sss... 
diswie cidintainreto slates se SE eRe | Sete eae AEN | Xiphodontide. 



Comparison of the list of groups under Glires with Thomas’ * Genera 
of Rodents? will show that all of his groups have been given recogni- 
tion, with the addition of the Zapodidee and the following six extinct 
families: Castoroididee, Eocardidee, Ischyromyide, Mixodectidee, Pseu- 
dosciurid:, and Theridomyide. The Lophyominz have been accorded 
full family rank, the name Muscardinidee has been substituted for 
Gliride, and in the Muride, Cricetine has been substituted for Sig- 
modontine and Myotalpine for Siphneine. 
CROSS REFERENCES. 
These various changes are indicated by eross references. Old 
family names which are not recognized are entered in their proper 
