HY ROCODON—TA. 345 
Hyrocodon—Continued. 
Name preoccupied by Hyracodon Leidy, 1856, a genus of Perissodactyla; and by 
Hyracodon Tomes, 1863, a genus of Marsupialia. Replaced by /7yracodonthe- 
rium Filhol, 1877. 
Extinct. Based on an upper jaw. 
Hyrocodon: Hyrax; 660v=660vs, tooth. 
Hysterotherium GirseL, 1847. Ungulata, Perissodactyla, Rhinocerotid:e. 
Neues Jahrb. Mineralogie, 1847, 54, 456. 
Type: Hysterotherium quedlinburgense Giebel (nomen nudum), from Quedlinburg, 
Germany. 
Extinct. Based on parts of a jaw with teeth, afterwards found to belong to a 
young rhinoceros. (1. c., 456.) 
Hysterotherium: b6répa, womb; 0nptov, wild beast. 
Hystricops (subgenus of Hystriv) Lerpv, 1858. Glires, Erethizontidee. 
Proc. Acad. Nat. Sci. Phila., 1858, 22. 
Type: Hystrix (Hystricops) venustus Leidy, from the Pliocene in the valley of the 
Niobrara River, Nebraska. 
Extinct. Based on ‘two isolated molar teeth.’ 
Hystricops: Hystrix; ow, aspect. 
Hystricotherium Croizer, 1853. Glires, H ystricidze. 
Crozet, in Pictet’s Traité Paléont., 2° ed., I, 255, 1853 (under Hystria); GERVAIS, 
Zool. et Paléont. Frang., 2° ed., 18, pl xiv, fig. 11, 1859. 
Type: Hystrirv refossa Gervais, from the Pliocene of Mt. Perrier, near Issoire, 
Puy-de-Dóme, France. ‘‘ Dans le catalogue de sa collection qui est aujourd'hui 
déposée au Muséum d'Histoire naturelle de Paris, M. l'abbé Croizet avait 
inserit sous le nom d' Hystricotherium une dent de cette espéce que nous avons 
fait représenter dans notre atlas, pl. 47, [48], fig. 11." (GERvars.) 
Extinct. 
Hystricotherium: Corp, VETpP1XOS, porcupine; Syptor, wild beast. 
Hystriocomys GirBeL, 1860. Glires, ? 
Halle Zeitsehr. Gesammt. Naturwiss. Berlin, XVI, No. rix, 148-151, Taf. 1, 
figs. 3-4, Sept., 1860. 
Type: Hystriocomys thuringiacus Giebel, from the lirnite of Rippersroda, Thürin- 
gen, Germany. 
Extinct. Based on the ** Linker Oberkiefer eines Nagers mit der vollstindigen 
Zahnreihe.”’ 
Hystriocomys: U6rp1é, v6rpiyos, porcupine; 0s, mouse. 
Hystrix LiNN.Evs, 1758. Glires, Hystricides. 
Systema Nature, 10th ed., I, 56-57, 1758; 12th ed., I, 76-77, 1766; Brisson, 
Regnum Animale in Classes IX distrib., 2d ed., 13, 85-89, 1762; W. L. SCLATER, 
Mamm. S. Africa, II, 89-92, figs. 111-112, 1901 (type fixed). 
Histrix Cuvier, Tableau Élément., 130, 1798. 
Species, 5: Hystrix cristata Linneeus (type), from Asia and Africa; H. prehensilis 
Linn:eus, from South America; /7. dorsata Linnzeus, from eastern Canada; AH. 
macroura Linnseus, from Asia; and H. brachyura Linnzeus, from Asia. 
Hystrix: Lat. from 6722, porcupine; apparently from vc, hog, Oot ( rpiy-), hair. 
I. 
Ia THomas, 1902. Chiroptera, Vespertilionid:e. 
Ann. & Mag. Nat. Hist., 7th ser., X, 163-165, Aug. 1, 1902. 
Type: Ja io Thomas, from Chung Yang, southern Hupeh, China. 
la: Ia, a young woman of classical times. Like many women of those times a 
bat is essentially flighty (Tuomas). This name, which seems to have been 
selected chiefly on account of its brevity, is the shortest one ever applied to a 
mammal. 
