76 INDEX GENERUM MAMMALIUM. ; 
Acrocyon AMEGHINO, 1887. Marsupialia, Borh y:enidze. 
Enum. Sist. Especies Mamff. Fós. Patagonia Austral, p. 8, ,Dec., 1887. 
Type: Acrocyon sectorius Ameghino, from the lower Tertiary of southern Patagonia. 
Extinct. 
Acrocyon: &xpor, highest point; «ocv, dog—from the form of the lower fourth 
premolar or first molar, which has three tubercles, the middle one being 
higher than either the anterior or posterior. 
Acrodelphis AnEL, 1900. Cete, Platanistidze. 
Denkschr. K. Akad. Wiss., Wien, Math.-Nat. Cl., LX VIII, 850, 851—853, 856-859, 
Taf. I, figs. 2, 4—6, 1900. 
Species 11, from Europe: Champsodelphis macrognathus Brandt, from southern 
France; Delphinus lophogenius Valenciennes, from the Miocene of France; ? C. 
scaldensis Du Bus, from the Antwerp Crag, Belgium; €. sp.? Gervais & Van 
Ben., from Xabregas, Portugal; ? C. denticulatus Probst, from Baltringen, Ger- 
many; ? C. cristatus Probst, from western Germany; C.ombonii Longhi, from the 
Miocene of Belluna, Italy; C. letochae Brandt, from the Miocene of Austria; 
? C. fuchsii Brandt, from southern Russia; ? C. karreri Brandt, from the Miocene 
of Austria; and Acrodelphis krahuletzi Abel, from the vicinity of Eggenberg, 
Austria. 
Acrodelphis: &kpos, pointed; 6eA@is, dolphin. 
Acromys (‘WaGNER’) TnovEssanT, 1881. Glires, Muridee, Murine. 
TRovEssART, Cat. Mamm. Viv. et Foss., Rodentia, pt. rr, in Bull. Soc. Sei. 
d'Angers, Fasc. 2, p. 133, 1881; PELZELN, Brasil. Siugeth. in K.-K. zool.-bot. 
Gesell. Wien, Beiheft zu Bd. X XXIII, 73, 1885. 
TROUESSART gives Acromys WAGNER, 1847, as a synonym of Drymomys Tscuvpr, 
i844, referring to Abhandl. K. Akad. München, V, 318, but the species is 
there given as Drymomys musculus. PELZELN quotes “‘Acromys musculus 
WacxER, Cat. Msc." in synonymy under Drymomys musculus. 
Acromys: &Kpos, pointed; “0s, mouse. 
Acronotus (subg. of Damalis) H. Smira, 1827. Ungulata, Artiodactyla, Bovide. 
GnirriTH's Cuvier, Anim. Kingdom, IV, 346-354, 1827; V, 361-364, 1827; Gray, 
List Spec. Mamm. Brit. Mus., pp. xxvi, 157, 1843 (raised to generic rank); 
ScLATER & THomas, Book of Antelopes, I, pt. r, pp. 5, 7, Aug., 1894 (in syn- 
onymy, type fixed). 
Species, 5: Damalis bubalis ( — Antilope buselaphus Pallas, 1766, type), D. caama, 
D. suturosa, D. senegalensis, and D. lunata, from Africa. 
Acronotus: pos, pointed; v@zos, back—in allusion to the high shoulders. 
Acropetes (subg. of Phalangista) I. GEorFRov, 1838.  Marsupialia, Phalangeridze. 
I. Grorrroy, quoted by GvÉRIN MÉxEviLLE, Icon. Régne Animal, I, 1829-38; 
Mamm., 20, 1838.4 
Nomen nudum. ‘Ce genre [ Phalangista] est divisé par plusieurs auteurs en deux 
sous-genres: l'un, celui des PÉTaAvRISTES proprement dits, renferme presque 
toutes les espéces; l'autre, celui des VouricEurs, acrobata, Desm., ne comprend 
que le P. pigm:eus. En outre, un troisiéme sous-genre a été distingué sous le 
nom d’ Acropetes par M. Isidore Geoffroy; ce dernier, outre quelques carac- 
téres moins importans, différe considérablement par le systéme dentaire." — 
GUERIN MÉNEVILLE. 
Acropetes: &kpov, top, height; zérouat, to fly—in allusion to its arboreal habits 
and its agility in leaping or flying. (Compare Acrobates. ) 
Acrostylops AwEGniNo, 1901. Tillodontia, Notostylopidee. 
Bol. Acad. Nac. Cien. Córdoba, XVI, 421, July, 1901 (sep. p. 75). 
Type: Acrostylops pungiunculus Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Acrostylops: &kpos, pointed; 6rOAos, pillar; ov, aspect. 

* [Internal evidence indicates that the text was not published until 1838. 
