INDEX OF GENERA 
ARRANGED ACCORDING TO ORDERS AND FAMILIES. 
[In the first column black-face type indicates that the genus is recent, italics that it is extinct. 
A dagger (+) indicates that a generic name is not available because it is preoccupied. 
A double dagger (1) indicates that a family name is not available either because it was not based 
on a generic name or because the latter is preoccupied.] 
ALLOTHERIA.” 
BOLODONTIDZE. 
FAMILIES AND SUBFAMILIES. 
Allodontid:z Marsn, 1889. Chirogide Corr, June, 1887. 
Bolodontidxe OsBorn, Nov. 1, 1887. | 
GENERA AND SUBGENERA. 
Name, authority, and date. Tupe or included species, and localities. 
Allacodom MNRSHy 1889.22: -—-- Allacodon lentus (type); A. pumilus, Laramie 
beds, Wyoming. 
PAUlodor SMASH LS =a. sso se ene Allodon laticeps, Atlantosaurus beds, Wyoming. 
Bolodon 0 WENT We m eec ccs Bolodon crassidens, Durdlestone Bay, England. 
CHRO A OPROMIGSA S erem Chirox plicatus, Puerco, New Mexico. 
NEOPLAGIAULACIDZE. (See PLAGIAULACID 2. ) 
PLAGIAULACIDZE.^ 
(Including Neoplagiaulacid:e and Polymastodontid:e). 
FAMILIES AND SUBFAMILIES. 
Cimolodontid: Marsn, 1889. Paradoximyina AMEGHINO, 1886. 
Cimolomid:e Marsu, 1889. Paradoxomydx AMEGHINO, 1889. 
Dipriodontide Marsn, 1889. Plagiaulacidae Gtuu, 1872. 
I Microlestid:; Murray, 1866. Poliimastodontid: Corr, 1884. 
Neoplagiaulacide AMEGHINO, 1890. Stereognathide Murray, 1866. 
Tripriodontide Marsn, 1889. 

* Allotheria was proposed by Mansu in September, 1880 (Am. Journ. Sci. and Arts, 
3d ser., XX, p. 239). The later term Multituberculata, which has come into more 
general use, was proposed by Corr in July, 1884 (Am. Naturalist, X VIII, p. 687). 
In the latest revision of the group (AwEGnrNo, Anales Mus. Nac. Buenos Aires, 
[X, p. 158, 1903), five families are recognized— Plagiaulacidze, Polydolopid:e, Neopla- 
giaulacidze, Promysopid:e, and Polymastodontidee. Of these the first two are here 
recognized, the Neoplagiaulacidse and Polymastodontidze are combined with the 
Plagiaulacidie, and the genera included under Promysopid:e are placed in * Incertze 
sedis.’ The Bolodontid:, which Ameghino combines with the Plagiaulacid:e, are 

recognized as a distinct family. 
^ Stereognathid:e should be used for this family both on account of earlier publi- 
cation as a family name and because it is based on the earliest generic name. 
(8i 
