DECTICADAPIS—DELOTHERIUM. 219 
Decticadapis— Continued. 
Decticadapis: 071 r1«ós, able to bite, i. e., a rodent; -- Adapis—in allusion to the 
occurrence in the Eocene ‘‘de rongeurs vrais, . . . qui ont néanmoins conservé 
quelques rapports de formes avec les cupulidentes." (LEMOINE. ) 
Decticus Aymarp, 1853. Glires, Murid:e, Cricetinze. 
AvMARD, in Pictet’s Traité Paléont., 2° éd., I, 250, 1853; Comptes Rendus, Paris, 
XXXVIII, 675, 1854; Congrés Sci. France for 1855, I, 2338, 1856. 
Type: Decticus antiquus Aymard, from the Lower Miocene of Puy de Dome, 
France. 
Extinct. Based on ‘‘une branche à peu prés complete de la máchoire inférieure." 
Decticus: 6nkt1k0s, able to bite, i. e., a rodent—in allusion to the incisors. 
Degonia Rotrn, 1901. Ungulata, Typotheria, Hegetotherid:e.* 
Revista Mus. La Plata, X, 251-252, Oct., 1901 (sep. pp. 1-2). 
Species: Degonia kollmanni Roth, and D. sympathica Roth, from the ‘ Upper Cre- 
taceous’ of Lago Musters, Territory of Chubut, Patagonia. 
Extinct. 
Degonia: A coined name (‘Frei erfunden'—Rorn ). 
Deilemys (subg. of Hesperomys) DE Saussure, 1860. Glires, Muridee, Cricetinze. 
Rev. et Mag. de Zool., 2d ser., XII, 98-101, 1860. 
Dilomys WixaE, E Museo Lundii, I, pt. i11, 149, Dec. 1, 1887. 
Dilemys BERGROTH, in C. O. Waterhouse's Index Zool., 108, 1902. 
Type: Hesperomys toltecus De Saussure, from the cordillera of Vera Cruz, Mexico. 
Deilemys: SeiAn, evening; 4Ds, mouse—either from its crepuscular or nocturnal 
habits, or intended as a name modeled after Hesperomys. 
Deilotherium Firnor, 1882. Ungulata, Artiodactyla, Anoplotheriid:e. 
Mém. Mamm. Foss. Phosphorites Quercy, in Ann. Soe. Sci. Phys. Nat. Toulouse, 
1882, 112-113. 
Type: Deilotherium simplex Filhol, from the Phosphorites of Quercy, France. 
Extinct. Based on a fragment containing the first and second molars. 
Deilotherium: S€1A6s, cowardly, in the sense of weak; 67piov, wild beast. 
Deinictis (see Dinictis). Fer:e, Felide. 
Deinotherium Kavr, 1829. Ungulata, Proboscidea, Deinotheriidz. 
Oken's Isis, 1829, 401—404, Taf. r. 
Dinotherium Kavrp, Das Thierreich, I, 268-270, 1855. 
Type: Deinotherium giganteum Kaup, from the Lower Pliocene of Eppelsheim, 
Hesse-Darmstadt, Germany. 
Extinct. 
Deinotherium: Servos, terrible; 07pzov, wild beast—in allusion to the animal’s 
large size and huge tusks in the lower jaw. 
Delotherium AwxranuiwNo, 1889. Monotremata (Dideilotherid:e). 
Act. Acad. Nac. Cien., Córdoba, VI, 655-657, 1889. 
Dideilotherium AMEGHINO, ibid., 920-921, pl. xr, fig. 22, 1889. 
Type: Delotheriwm venerandum Ameghino, from the Eocene (Santa Cruz formation ) 
of the barrancas of the Rio Santa Cruz, southern Patagonia. 
Extinct. ‘‘Representado . . . por un fragmento de maxilar superior izquierdo, 
con el intermaxilar del mismo lado, con el alvéolo rudimentario del primer 
incisivo, . . . el incisivo tercero 6 interno intacto, . . . dos dientes intactos de 
la misma forma, luego un trecho de maxilar destruido . . . después tres 
dientes, 4 los que les falta la corona." 
Name preoccupied by Deilotherium Filhol, 1882. Replaced by Dideilotherium 
Ameghino, 1889. 
Delotherium:  07)Aoc, manifest, evident; 97ez¢ov, wild beast—i. e., evidently a 
mammal, although possessing reptilian characters. 


* Hegetotheride Ameghino, Feb., 1894— Pachyrucid: Lydekker, March, 1894. 
