610 INDEX GENERUM MAMMALIUM. 
Rhynchonycteris Prerers, 1867. Chiroptera, Noctilionidee. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, July, 1867, 477-478; Dogson, Cat. 
Chiroptera Brit. Mus., 366-369, 1878. 
Type: Vespertilio naso Maximilian, from the vicinity of Morro d'Arara, on the 
Rio Mucurí, Minas Geraés, Brazil. 
Rhynchonycteris: Doy xoc, snout; vuKrepts, bat—from the shape of the muzzle, 
the upper extremity being very pointed and produced beyond the lower lip. 
Rhynchopithecus Danursow, 1857. Primates, Cercopithecidee. 
Zool. Studier, I, Andra Hiiftet, 83, 91-94, Tab. rv, 1857. 
New name for Nasalis É. Geoffroy, 1812, which is considered untenable as a 
generic name, because it is formed from a Latin adjective. 
Rhynchopithecus: Doy xoc, snout; zí0nkos, ape. 
Rhyncodon (‘Prrers’) ALLEN, 1892. Insectivora, Macroscelididze. 
Visitor's Guide Coll. Mamm. Am. Mus. Nat. Hist., N. Y., 34, 1892. 
Misprint for Rhynchocyon Peters, 1847. 
Name preoccupied by Rhynchodon Nitzsch, 1840, a genus of Birds. 
Rhyncotherium FArcoxEn, 1868. Ungulata, Proboscidea, Elephantidze. 
Palzeont. Memoirs and Notes, II, 74-75, 1868. 
Type species not given. ‘‘At Genoa I saw a cast of a large lower jaw of a Masto- 
don from Mexico... The specimen is unpublished material, and I was 
therefore only allowed to examine it very cursorily. The Genoese paleonto- 
logists had provisionally named it Rhyncotherium, from the enormous develop- 
ment of the beak, approaching Dinotheriwm." | (FALCONER, ext. from letter to 
M. Lartet, Sept. 12, 1856. ) 
Extinct. 
Rhyncotherium: pvyxos, snout; 07piov, wild beast. 
Rhynopoma (sce Rhinopoma ). Chiroptera, Noctilionidee. 
Rhyphodon Rorn, 1899. Ungulata, Ancylopoda, Isotemnid:e. 
Revista Mus. La Plata, IX, 388, 1899; AwEaniNo, Sin. Geol.-Paleont., Segundo 
Censo Nac. Rep. Argentina, I, Supl., p. 12, July, 1899. 
Type: Rhyphodon lankesteri Roth, from the upper ‘ Cretaceous’ of Lago Musters, 
Territory of Chubut, Patagonia. 
Extinct. 
Rhyphodon: pvpéw( —podoéc), to gulp down; d6@v=ddovs, tooth. 
Rhytina (see Rytina). Sirenia, Hydrodamalidee. 
Rhytiodus (see Rytiodus). Sirenia, Halitheriidee. 
Rhytisodon Pa4oro, 1897. Cete, Squalodontide. 
Atti Soe. Veneto-Trentina Sci. Nat., Padova, ser. II, vol. III, 49, 1897. 
Type: (?) Squalodon tuberculatus Costa, from Italy. The name stands ''Gen. 
Rhytisodon vel Squalodon . . . Squalodon tuberculatus O. G. Costa." 
Extinct. - 
Rhytisodon: pvrís, wrinkle; 006v —Ó807vc, tooth. 
Rhyzaena (see Ryzaena). Ferve, Viverrid:e. 
Ribodon Awraniwo, 1883. Sirenia, Trichechidee. 
Bol. Acad. Nac. Cien. Córdoba, V, entr. 1, pp. 112-113, 1883; Cont. Conocimiento 
Mamíf. Fósil. Repüb. Argentina, in Act. Acad. Nac. Cien., Córdoba, VI, 
493-496, pl. xxirr, figs. 13-17, 1889. 
Type: Ribodon limbato [limbatus] Ameghino, from the barrancas del Paraná, Entre 
Rios, Argentina. 
Extinct. Based on a single molar. 
