196 INDEX GENERUM MAMMALIUM. 
Colobus itiicErR, 1811. Primates, Cercopithecid:e. 
Prodromus Syst. Mamm. et Avium, 69, 1811. 
Colobolus Gray, London Med. Repos., XV, 298, Apr. 1, 1821. 
Species: Simia polycomos Schreber, and S. ferruginea Shaw, from West Africa. 
Colobus: koÀofjós, mutilated, docked—in allusion to the rudimentary thumb 
(* pollice nullo'—-Illiger). : 
Colodon Mansu, 1890. Ungulata, Perissodactyla, Lophiodontidee. 
-Am Journ. Sci. & Arts, 3d ser., XX XIX, 524, June, 1890. 
Type: Colodon luxatus Marsh, from the Brontotherium beds of the Oligocene of 
South Dakota. ‘ 
Name preoccupied by Colodus Wagner, 1861, a subgenus of Rhinocerotid:e. 
Extinct. 
Colodon: kóAoc, stunted; 6d6@v = d60vs, tooth—in allusion to the absence of 
canines in the lower jaw. 
Colodus (subg. of Chalicotherium) W ^GNER, 1861. Ungulata, Rhinocerotide. 
Sitzungsber. K. Bayerisch. Akad. Wiss., München, II, 81-82, Taf. fig. 4, 1861. 
Type: Rhinoceros pachygnathus Wagner; from the Pliocene (Pikermi beds) of 
Greece. 
Extinct. 
Colodus: «óAos, stunted; 6d0vs, tooth. 
Colonoceras Mansn, 1873. Ungulata, Perissodactyla, H yracoaontid:e. 
Am. Journ. Sci. & Arts, 3d ser., V, 407-408, May, 1873. 
Type: Colonoceras agrestis Marsh, from the Eocene of Wyoming. 
Extinct. 
Colonoceras: KOAos, stunted; Képas, horn—in allusion to the pair of dermal 
horns on the nasal bones. 
Colonomys Marsu, 1872. Glires, Ischyromyid:e. 
Am. Journ. Sci. & Arts, 3d ser., IV, 220-221, Sept., 1872 (sep. issued Aug. 17). 
Colonymys ALLEN, Mon. N. Am. Rodentia, 938, 944, 1877; ZrrrEL, Handb. Palzeont., 
IV, 2'* Lief., 522, 1893. 
Type: Colonomys celer Marsh, from the Eocene near Henry Fork of Green River, 
Wyoming. 
Extinct. Based on ‘several isolated molars.’ 
Colonomys: KóAos, stunted; 0s, mouse. (Mars. ) 
Colophonodon Lerpy, 1858. Cete, Squalodontid:e. 
Proc. Acad. Nat. Sci. Phila., for 1852-53, 377, 1853; Journ. Acad. Nat. Sci. Phila., 
2d ser., VII, 418, 1869 (synonym of Squalodon holimesii). 
Type: Colophonodon holmesii Leidy, from Ashley River, South Carolina. 
Extinct. Based on ‘‘a nearly entire tooth, with fragments of five others." 
Colophonodon: kóAos, stunted; $óros, murder; d5@v=0ddo0vs, tooth. 
Coloreodon Corr, 1879. Ungulata, Artiodactyla, Agriochceride. 
Paleont. Bull. No. 31, p. 6, Dec. 24, 1879; Proc. Am. Philos. Soc., XVIII, 375-376, 
Dec. 30, 1879; Ibid., X XI, 570, 1884; Am. Naturalist, XIV, 60, Jan., 1880; Bull. 
U. 8. Geol. and Geog. Surv. Terr., VI, No. 1, pp. 173-174, 1880; Hay, Cat. 
Foss. Vert. N. Am., Bull. 179, U. S. Geol. Surv., 662, 1902 (type fixed). 
Species from the Miocene of Oregon: Coloreodon ferox Cope (type), from the 
North Fork of John Day River; and C. macrocephalus Cope, from the ‘Cove’ 
of John Day River. 
Extinct. 
Coloreodon: kóAos, stunted; + Oreodon—in allusion to the ‘reduced dental for- 
mula,’ due to the absence or rudimentary development of the first upper 
premolar. 
Colotaxis Corr, 1873. Glires, Ischyromyidee. 
Paleont. Bull., No. 15, p. 1, Aug. 20, 1873; Rept. U. S. Geol. & Geog. Surv. Terr., 
VII, for 1873, 477, 1874. 
