950 INDEX GENERUM MAMMALIUM. 
Echinothrix * Bnooxzs, 1828. Glires, Erethizontidze. 
“Cat. Anat. & Zool. Museum of Joshua Brookes, London, 54 (previous to July 14), 
1828;" Trans. Linn. Soc. London, XVI, pt. 1, 97, 1829. 
Type: Echinothrix dorsata (= Hystriv dorsata Linneeus), from eastern Canada. 
Echinothrix: éxivos, hedgehog; §pié, hair—in allusion to the barbed quills, or 
spines, which are mingled with and usually concealed by the hair. 
Echinothrix Aston, 1876. Glires, Murid:s, Rhynchomyine. 
Proc. Zool. Soc. London, 1876, 83; Oarrav, Cat. Australian Mamm., 121, 1892. 
Emendation of Echiothrix Gray, 1867. 
Preoceupied by Lchinothrix Brookes, 1828, a genus of Erethizontid:e; and by 
Echinothrix Peters, 1853, a genus of Echinodermata. Replaced by Craurothria 
Thomas, 1896. 
Echinothriv: £xivos, hedgehog; 601£, hair—in allusion to the flattened spines 
which are mixed with the fur. 
Echiomys (see Echimys). Glires, Octodontide. 
Echiothrix Gray, 1867. Glires, Muridee, Rhynchomyin:e. 
Proe. Zool. Soc. London, 1867, 599-600, 4 figs. in text. 
Echinothrix Ausron, Proc. Zool. Soc. London, 1876, 83; OarrBv, Cat. Australian 
Mamm. 121, 1892. 
Type: Echiothrix leucura Gray, said to be from Australia, but more probably from 
Celebes (cf. THomas, Ann. & Mag. Nat. Hist., 6th ser., XVIII, 246, 1896). 
Name preoccupied by Echinothrix Brookes, 1828, a genus of Erethizontidee; and 
by Echinothrix Peters, 1855, a genus of Echinodermata. Replaced by Craurothria 
Thomas, 1896. The latter name was afterwards discarded by Thomas with 
the followingexplanation: ‘‘As I have now joined those who think that names 
should be retained as originally spelt, whether classically right or wrong 
(except in the case of obvious misprints), I am now prepared to consider that 
Peters’s Echinothrix of 1853 does not preoccupy Gray’s Echiothrix of 1867, and 
therefore again recognize the latter term . . . That the missing out of the 
letter » is not a misprint is shown by Gray having written on the type skin 
what appears to be ' Echithriv, might be ' Echiothrir, but is certainly not 
Echinothrix.’ (Trans. Zool. Soc. London, XIV, pt. v1, 597 footnote June, 1898.) 
Echiothrix:+ a contraction of éyZvos, hedgehog; §pié, hair—from the flattened 
spines which are mixed with the fur. 
Echymipera Lesson, 1842. Marsupialia, Peramelide. 
Nouy. Tableau Régne Animal, Mamm., 192, 1842. 
Type: Echymipera kalubu Lesson (= Perameles doreyanus Quoy & Gaimard), from 
Waigiou, New Guinea. 
Echymipera ( Echimypera): Echimys; anpa, pouch—i. e., a pouched Lchimys. 
" 
Echymys (see Echimys, 1809). Glires, Octodontidee. 
Ecphantodon Mercerat, 1891. Primates, Cebidee. 
Revista Mus. La Plata, IT, 73-74, Oct., 1891; AwEaniNo, Enum. Syn. Mamm. 
Foss., 10, 1894 (date of publication). 
Type: Ecphantodon ceboides Mercerat, from the Eocene of the barrancas of the 
Rio Santa Cruz, Patagonia. (See Homunculus Ameghino, Aug., 1891.) 
Extinct. Based on ‘‘un fragmento muy destrozado de la rama derecha del 
maxilar inferior con un solo diente roto en su parte postero-interna." 
* This name is open to question, as it was published in a sale catalogue. 
f This form has classical sanction, compare éyz0dyKTOs ( —éyi8vóO7)«ros) Strabo, 
588; Diosc., Noth. I, 108. 
