DOT INDEX GENERUM MAMMALIUM. 
Desmostylus Mansn, 1888. Sirenia, Halitheriide. 
Am. Journ. Sci. & Arts, 3d ser., XX XV, 94-96, figs. 1-3 in text, Jan., 1888. 
Desmotylus C. O. WATERHOUSE, Index Zool., 54, 1902 (misprint). 
Type: Desmostylus hesperus Marsh, from the Pliocene of Alameda County, Cali- 
fornia. 
Extinct. Based on several teeth. . 
Desmostylus: 886502, band, bundle; 6r0Aos, column—in allusion to the molar 
teeth ** which are composed of a number of vertical columns closely pressed 
together." (Mamsn.) 
Deuterotherium AwEcniNo, 1895. Ungulata, Litopterna, Proterotheriid:ze. 
Bol. Inst. Geog. Argentino, XV, cuad. 11-12, p. 633, 1895 (sep. p. 33). 
Type: Deuterotherium distichum Ameghino, from the Pyrotherium beds in the 
interior of Patagonia. 
Extinct. Based on a caleaneum and part of a mandibular symphysis. 
Deuterotherium: Sevrepos, second; Inpiorv, wild beast. 
Diabolus Gray, nee Marsupialia, Dasyuridee. 
J. E. Gray, in Grey's Journ. Two Exped. North-West and West Australia, App. 
II, 400, 1841; List ped Mamm. Brit. Mus., pp. xxii, 97, 1843; List Osteol. Spec. 
Brit. Mus., pp. xi, 141, 1847. 
Type: Due wrsira eerie. from Tasmania. (See Sarcophilus Cuvier, 1837.) 
Diabolus: 61a oA os, devil—irom its ferocious and destructive habits, whence its 
common name of ‘Tasmanian devil. 
Diabroticus Pome, 1848. Glires, Castoridz. 
Archiv. Sci. Phys. et Nat., Bibl. Univ. Genéve, IX, 167, Oct., 1848; ProrET, 
Traité Paléont., 2* éd., L 260, 1853. 
Diobroticus LYDEKKER, in Flower & Lydekker's Mamm., Living & Extinct, 458, 
1891. 
Type: Diabroticus schinerlingii Pomel, from caverns (near Liege?) in Belgium. 
Name provisionally proposed for the mandibles referred to Trogontherium by 
Owen, and for some teeth identified by Schmerling as those of an Agouti. 
Name preoccupied by Diabrotica Chevrolat, 1834, a genus of Coleoptera. (DEJEAN, 
Cat. Coll. Coléopt., 2* éd., 1834.) 
Extinct. 
Diabroticus: dtafhpwtikos, able to eat through, i. e., a rodent—in allusion to its 
incisors. 
Diacodexis Corr, 1882. Primates, H yopsodidze? 
Am. Naturalist, XVI, 1029, Dec. (2?), 1882; Tert. Vert., 492, 1885; MaATTHEW, 
Bull. Am. Mus. Nat. Hust. N. Ye, 2 Xch 1905808995 Oseone ibid., XVI, 175, 184, 
fig. 10, June 28, 1902. 
Type: Phenacodus laticuneus Cope, from the Eocene (Wasatch) of the Big Horn 
River, Wyoming. 
Extinct. *'The premolars associated with the type and only specimen of Dia- 
codexis laticuneus Cope are those of Hyracotherium index; the upper and lower 
molars belong to Hyopsodus, closely sae to H. powellianus." (Marriew, l.c.) 
Diacodexis: 61-, two; di?) point; 6722s, bite—possibly in allusion to the last 
three upper premolars, which have em o external cusps. 
Diacodon Corr, 1875. Insectivora, Leptictidee. 
Syst. Cat. Vert. Eocene New Mexico, 11-12, Apr. 17, 1875; Hay, Cat. Foss. Vert. 
Am., Bull. 179, U. 8. Geol. Surv., 740, 1902 (type fixed). 
Species: Diacodon alticuspis Cope (type), from the Eocene of New Mexico, and 
D. celatus Cope, from the Green River Eocene of Wyoming. 
Extinct. 
