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Family ScutigeridaeScutigera carrizala Chamberlin from Cueva delCarrizal, Nuevo Leon, was listed by Nicholas (1962)as a troglobite; this species shows no signs of caveadaptation and should be considered a troglophile.Scutigera cacahuamilpensis Herrera was describedfrom Grutas de Cacahuamilpa, Guerrero. It is probablya synonym of S. linceci (Wood) which has beenreported from that cave as well as from Grutas deJuxtlahuaca, Guerrero, and Grutas de Atoyac, Veracruz;this species is also a troglophile.Class PauropodaThe only record of pauropods in Mexican cavesis that of a single undetermined specimen collectedin Cueva del Jobo, San Luis Potosi (Bonet, 1953a).Class DiplopodaThe millipeds, better than any other group, characterizethe cave fauna of the region under consideration.Every cave with any appreciable moisture canbe expected to contain at least one and usually severalspecies of milliped. Although 46 troglobitic and90 other species have been reported (see Table 19),the class is still poorly known. Many genera andspecies of both troglobite and troglophile remain undescribedor belong to such poorly known groupsthat specific identifications are not presently possible.Order PolyxenidaeFamily LophoproctidaeThe minute miIlipeds of the order Polyxenida havebeen found in several caves throughout southernMexico, but only one species, Lophoproctinus diversunguisSilvestri, from Grutas de Atoyac, Veracruz,has been identified. The taxonomy of this complexgroup is very different from that of other millipeds,and no systematists are presently working with theNorth American fauna. The polyxenids are usuallyfound in soil and deep litter, and the cavernicolespecies are presumably all troglophiles.Order GlomeridesmidaFamily GlomeridesmidaeThe order Glomeridesmida in North America isrepresented by six species from Panama, one fromGuatemala, and this Mexican troglobite. Shear(1974) reports five undescribed epigean species fromMexico. All of the described forms have been placedin the genus Glomeridesmus, but Shear believes thatat least three genera are represented.Table 19.-Summary of cave inhabiting Diplopoda.Troglobites Other SpeciesPolyxenidaLophoproctidae 0 1GlomeridesmidaGlomeridesmidae 1 0GlomeridaGlomeridae 4 0ChordeumidaCleidogonidae 5 3Trichopetalidae 4 0JulidaJulidae 0 1Paraiulidae 0 1*Polydesmida 23 64PolyzoniidaPolyzoniidae 0 2Siphonophoridae 0 1SpirobolidaAtopetholidae 0 1Messicobolidae 0 2Rhinocricidae 0 4Spirobolellidae 1 0Spirobolidae 0 2SpirostreptidaCambalidae 6 0Spirostreptidae 2 6StemmiulidaStemmiulidae 0 1PlatydesmidaPlatydesmidae 0 1Total 46 90*For summary by families see Table 20.Glomeridesmus sbordonii ShearGlomeridesmus sbordonii Shear, 1974:241,245,246,248, fig. 1-4; Sbordoni et al., 1974: 15,30 (nomennudum); Sbordoni, 1974:366.Type-locality.-Grutas de Cocona, Teapa, Tabasco,Mexico.Distribution.-Known from the type-locality andpossibly one cave in Chiapas. See Fig. 52.Records.-Chiapas: ?Cueva de la Golondrina; Tabasco:Grutas del Cocona.Discussion.-Specimens from Grutas del Coconahave been taken in large numbers from rotten woodnear the end of the cave.Order GlomeridaFamily GlomeridaeThe family Glomeridae is represented in the NewWorld only by two genera: Onomeris contains severalepigean species in the southeastern United States;Glomeroides contains the four troglobitic species includedhere, two described epigean species from173