NEORACANTHUS —NEOTHORACOPHORUS. 455 
Neoracanthus AMEGHINO, 1889. Edentata, Megatheriide. 
Cont. Conocimiento Mamíf. Fósil. Repüb. Argentina, in Act. Acad. Nae. Cien., 
Córdoba, VI, 673-677, pls. xu fig. 19, xrzr figs, 1-2, xum fig. 5, rxxviir figs. 
1-2, May 20, 1889. 
New name for Oracanthus Ameghino, 1885, which is preoccupied by Oracanthus 
Agassiz, 1837, a genus of Pisces. 
Extinct. 
Neoracanthus: véos, new; --Oracanthus. 
Neoreomys AmeEGHINO, 1887. Glires, Octodontid:e. 
Enum. Sist. Especies Mamif. Fós. Patagonia Austral, pp. 10-11, Dec., 1887. 
Species, 3: Neoreomys australis Ameghino, N. indivisus Ameghino, and N. decisus 
Ameghino, from the lower Tertiary of southern Patagonia. 
Extinct. 
Neoreomys: véos, new; + Oreomys. 
Neoryctes (‘ScLiaTEr’) 8riRLING, 1891. Marsupialia, Notoryctide. 
SrrRLING, Trans. Roy. Soc. South Australia, XIV, pt. 1, 186, July, 1891. 
Name merely suggestea by Sclater to replace Psammoryctes Stirling, 1889 (which 
is preoccupied by Psammoryctes Pceppig, 1835, a genus of Glires), but not 
adopted by Stirling, and apparently never actually used for any mammal. 
* Professor Newton suggested Notoryctes as being appropriate, in view of its 
Australian habitat, and this name is, I think, preferable to Neorycles, which 
had been previously proposed by Dr. Sclater." — (SmrRLING.) 
Neoryctes: véos, new; ÓpUkr5c, digger—in allusion to its burrowing habits. 
Neosciurus (subgenus of Sciurus) TRouEssarT, 1880. Glires, Sciuridee. 
Le Naturaliste, II, No. 37, p. 292, Oct. 1, 1880; Cat. Mamm. Viv. et Foss., 
Rodentia, in Bull. Soc. d' Études Sci. d'Angers, X, 1° fasc., 76-77, 1880; Bull. 
U.S. Geol. & Geog. Surv. Terr., VI, No. 2, p. 305, Sept. 19, 1881; Tuowas, Proc. 
Zool. Soc. London, 1897, 933; NErsow, Proc. Wash. Acad. Sci., I 27-28, 1899. 
Species, 5: Sciurus carolinensis Gmelin (type), from Carolina; 5. arizonensis Coues, 
from Fort Whipple, Arizona; S. griseoflavus Gray, from Guatemala; ^. aberti 
Woodhouse, from San Francisco Mountain, Arizona; and S. fossor Peale, from 
southern Oregon. 
Neosciurus: véos, new; + Sciurus. 

Neosorex Baixp, 1857. Insectivora, Soricid:e. 
Mamm. N. Am., pp. xxxii, 11, 1857; Merriam, N. Am. Fauna, No. 10, pp. 90, 92, 
1895. 
Type: Neosorex navigator Cooper MS., supposed to have come from the head of 
the Yakima River, Washington (alt. 2,500 ft.), but probably from northern 
Idaho. (See Merrtaw, l. c.) 
Neosorex:* véw, to swim; --Sorex—in allusion to the large fringed feet. indica- 
tive of the animal's aquatic habits. 
Neothoracophorus AMEGHINO, 1889. Edentata, Glyptodontidee. 
Cont. Conocimiento Mamíf. Fósil. Reptib. Argentina, in Act. Acad. Nac. Cien., 
Córdoba, VI, 790-792, pl. r1v figs. 2, 7-10, 1889. 
New name for Thoracophorus Gervais & Ameghino, 1880, which is preoccupied 
by Thoracophorus Hope, 1840, a genus of Coleoptera. 
Name antedated by Myloglyptodon Ameghino, 1884. 
Extinet. 
Neothoracophorus: véos, new; +-Thoracophorus. 


*The derivation of this word is usually given as véos, new; --Sorex (Century 
Dict.), indicating a new type of shrew, but it seems more probable that the genus 
received its name, as indicated above, on account of its aquatic habits. 
