PACHYOTUS—PACHYSOMA. 495 
Pachyotus Gray, 1831. Chiroptera, Vespertilionid:e. 
Zool. Miscellany, 38, 1831; Mag. Zool. & Bot., II, No. 12, p. 498, 1838. 
Includes the genera Nycticejus and Scotophilus. Reduced in 1838 to a subgenus 
of Scotophilus, containing Vespertilio polythrix I. Geoffroy, and V. levis I. 
Geoffroy, from Brazil. 
Pachyotus: waxvs, thick; os, @r0s, ear. 
Pachypithecus AmeEGHINo, 1897. Primates, Archeeopithecide. 
La Argentina al través de las Ultimas Epocas Geológicas, 13 footnote, 1897 
(nomen nudum); Bol. Inst. Geog. Argentino, XVIII, 423, Oct. 6, 1897. 
Type: Pachypithecus macrognathus Ameghino, from the ‘Cretaceous’ of Patagonia. 
Extinct. 
Pachypithecus: wayvs, thick; zí05«os, ape. 
Pachypleurus (subgenus of Delphinapterus) BRANDT, 1873. Cete, Delphinidee. 
Mém. Acad. Imp. Sci. St.-Pétersbourg, X X, 234-239, Taf. xxiv, 1873. 
Species: Delphinapterus nordmanni Brandt, and D. fockii Brandt, from southern 
Russia. 
Name preoccupied by Pachypleura White, 1853, a genus of Coleoptera; and by 
Pachypleura Curioni, 1854, a genus of Reptilia. Replaced by ArcAaocetus Sin- 
zow, 1898; and by Pristinocetus Trouessart, Nov., 1898. 
Extinct. 
Pachypleurus: maxvs, thick; zAevpóv, rib. 
Pachypus D'Arrow, 1839. Edentata, Glyptodontid:e. 
*Naturf. V. Erlangen 1839" (fide Bronn's Handb. Gesch. Natur, III, Index 
Palaeont, 537, 1848). 
Based on Glyptodon clavipes Owen, from the Pleistocene of the province of Buenos 
Aires, Argentina (fide Bronn’s Index). 
Name preoccupied by Pachypus Dejean, 1831, a genus of Coleoptera. 
Extinct. 
Pachypus: maxvrovs, thick-footed (from zayvs, thick; zovs, foot). 
Pachyrukhos AmMEGHINO, 1885. Ungulata, Typotheria, Hegetotherid:e. 
Bol. Acad. Nac. Cien. Córdoba, VIII, entr. 1, pp. 160-162 footnote, 1885. 
Pachyrucos AMEGHINO, Act. Acad. Nac. Cien., Córdoba, VI, 422-436, 918, pl. xir 
figs. 1-35, 1889. 
Type: Pachyrukhos moyani Ameghino, from a barranca 90 miles above the mouth 
of the Rio Santa Cruz, Patagonia. 
Extinct. Based on portions of three jaws and two left upper molars. 
Pachyrukhos: zaxyvs, thick; 5vy xoc, snout. 
Pachysiagon Owen, 1874. Marsupialia, Macropodidee. 
[Proc. Roy. Soc. London, X XI, No. 145, p. 386, 1873—nomen nudum. } 
Phil. Trans. Roy. Soc. London, CLXIV, pt. 11, 784—785, pl. nxxvr figs. 7-10, 1874.* 
Type: Pachysiagon otuel Owen, from the Pleistocene of Kings Creek, Clifton, 
Queensland. 
Extinct. Based on the posterior part of the right mandible with the last three 
molars. 
Pachysiagon: maxvs, thick; 6ray@yv, jawbone. 
Fachysoma I. Grorrroy, 1828. Chiroptera, Pteropodid:e. 
Dict. Class. Hist. Nat., XIV, 703-705, Sept., 1828; E. Grorrroy, Cours Hist. 
Mamm., 13° Lecon, for June 27, 1828, 26-28. 
Species, 5: Pteropus melanocephalus Temminck, from Java; P. titthecheilus Tem- 
minck, from Java and Sumatra; Pachysoma diardii Geoffroy, from Sumatra; P. 
dwuvaucelii Geoffroy, from Sumatra; and P. brevicaudatum Geoffroy, from 
Sumatra. 
Name preoccupied by Pachysoma MacLeay, 1821, a genus of Coleoptera. 
Pachysoma: zayvs, thick; 6a, body. 

* Given as a subgenus (of Macropus ?), but used as a genus, 
