316 INDEX GENERUM MAMMALIUM. 
Hemiacis—Continued. 
Type: Hemiacis perdicida Cope, from the limestone breccia of a cave in Wythe 
County, Virginia. 
Extinct. ‘‘Represented by a left ramus of the mandible, with dentition com- 
plete. 
Hemiacis: ui-, half; &kis, point—in allusion to the molar. ‘‘The tubercular 
molar is relatively as in the allied genera (Mephitis and Lutra) but without 
sharp tubercle.’’ (Cope. ) 
Hemiacodon Marsn, 1872. Primates, Anaptomorphid:e? 
Am. Journ. Sci. & Arts, 3d ser., IV, 212-213, Sept., 1872 (sep. issued Aug. 13); 
Osporn, Bull. Am. Mus. Nat. Hist., N. Y., XVI, 200, June 28, 1902; Hav, Cat: 
Foss. Vert. N. Am., Bull. 179, U. S. Geol. Surv., 794, 1902 (type fixed). 
Species, 3: Hemiacodon gracilis Marsh (type), and H. nanus Marsh, from Henry 
Fork of Green River; and H. pucillus Marsh [sic], from Grizzly Buttes, near 
Fort Bridger, all from the Eocene of Wyoming. 
Extinct. 
Hemiacodon: zjui-, half; d), point; 65@v=66 ovs, tooth. 
Hemiauchenia Gervais & AwEGHINO, 1880. Ungulata, Artiodactyla, Camelide. 
Mamm. Foss. l'Amérique du Sud, 120-125, 1880. 
Type: Hemiauchenia paradora Gervais & Ameghino, from the Pleistocene of the 
province of Buenos Aires, Argentina. 
Extinct. Based on a portion of a cranium, including the two maxillaries with 
all the molars in place, and the canine on the left side. 
Hemiauchenia: Zjui-, half; + Auchenia. Este genero “esti caracterizado por la 
presencia de seis muelas superiores en série continua, debido & la existencia del 
p? que falta’ tanto en Auchenia como en Palzolama’’ (AMEGHINO, Mam. Fos. 
Argentinos, 503, 1889). 
Hemibelideus (subgenus of Phalangista) CoLLettr, 1884. Marsupialia, Phalangeride. 
Proc. Zool. Soe. London, 1884, 385-387, pl. xxx1, 2 figs. in text. 
Type: Phalangista ( Hemibelideus) lemuroides Collett, from northern Queensland. 
Hemibelideus: zj4i-, half; + Belideus. ‘‘ Evidently a transition stage between the 
true Phalangers and the genus Petawrista, having the skull, but not the pata- 
gium of the latter, and the bushy cylindrical tail, but not the skull of the 
Phalanger subgenus Trichosurus." (CoLLETT. ) 
Hemibos Fatconer, 1865. Ungulata, Artiodactyla, Bovide. 
FarcoxER, quoted by RérIMEYER, in Verhandl. Naturforsch. Gesellsch. Basel, IV, 
2tes Heit, 330, 1865; RüTIMEYER, Versuch. Natürl. Gesch. Rindes, Abth. 2, p. 23, 
1867; Fatconer, Palzeeont. Memoirs & Notes, I, pp. 23, 280, 546, 555, 1868; 
LypeKKeEr, Mem. Geol. Sury. India ( Palzont. Indica), ser. 10, I, pt. mm, 145-149, 
pls. xxrr-xxarr [Reissue pls. xx—xxiv], 1878. 
Type: Hemibos triquetricornis Falconer, from the Siwalik Hills, India. 
Extinct. Based on a cranium. 
Hemibos: 7ju1-, half; -- Bos. 
Hemicaulodon Corr, 1869. Sirenia, Halitheriide. 
Proc. Am. Philos. Soc., XI, 190-191, pl. v, fig. 6, 1869. 
Type: Hemicaulodon effodiens Cope, from the Eocene marl pits of Shark River, 
Monmouth County, New Jersey. 
Extinct. Based on a 'right upper incisor.' 
Hemicaulodon: Zui-, half; «avAóc, stalk; 660v—=66 0v's, tooth—in allusion to the 
form of the upper incisor. 
Hemicentetes Mivarr, 1871. Insectivora, Tenrecide. 
Proc. Zool. Soc. London, 1871, 58-65, 72-73, pl. v, 9 figs. in text. 
