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Yucatan but did not identify the species; he indicatedthat it was probably a troglobite. Numerousrecent collections from the Yucatan Peninsula containspecimens probably applicable to that reportedby Creaser, but remain unstudied.Family SphaeroniscidaeSpherarmadillo cavernicola MulaikSpherarmadillo cavernicola Mulaik, 1960:84, 179,180-181, fig. 334-341; Nicholas, 1962:170;Schultz, 1970b:125, fig. 11-17; Reddell, 1971b:22; Reddell and Mitchell, 1971a:143; Reddell andMitchell, 1971b: 183; Reddell and Elliott, 1973a:171; Reddell and Elliott, 1973b:181; FernandezRuiz, 1976:717.Type.locality.-Cueva de los Sabinos, San Luis PotosI,Mexico.Distribution.-Known from one cave each in theSierra de El Abra, San Luis PotosI, and the Sierra deGuatemala, Tamaulipas. See Fi~. ~.Records.-San Luis Potosi: Cueva de Los Sabinos;Tamaulipas: Cave (Rancho del Cielo).Discussion.-A record of this species from Huatusco,Veracruz (Mulaik, 1960) is doubtlcss an errorand is presumably applicable to S. huatuscensis .Vlulaik.The species belonging to the genus Spherarmadilioare only very poorly separated from those ofthe genus Sphaeroniscus. Spherarmadillo cavemicolais more closely related to S. huatuscensis from Veracruzthan to the only other species of the genus, S.schwarzi Richardson, from Guatemala. Schultz (pers.comm.) expresses the opinion that this spccies maybe an endogean form, but it is apparently still knownonly from the cave habitat. It is, thereforc, rctainedin this list with some reservations.Family SquamiferidaeThe family Squamifcridae is represented in :\'lcxicancaves by four species of the genus Trichorhina,three of which are anophthalmic and included here.A fourth species, T. vandeli Rioja, is known onlyfrom Cueva Cerro Hueco, Chiapas, and possessesreduced eyes; it is probably a troglophile. The remainingfour species are epigean forms. Vandel(1964) indicated that all of these species are prob.ably endogeans, and he may be correct. The epigeanisopod fauna of Mexico is only poorly known, anduntil careful collections of the endogean habitat havebeen made, any speculations on the relationships ofthese species are premature.Trichorhina atoyacensis MulaikTrichorhina atoyacensis Mulaik, 1960:83, 140, 141,fig. 127-130; Nicholas, 1962:171; Lemos de Castro,1964:1; Reddell, 1971b:22.Type.locality.-Cueva (=Grutas) de Atoyac, Atoyac,Veracruz, Mexico.Distribution.-Known only from the type-locality.See Fig. 9.Discussion.-Schultz (pers. comm.) has indicatedthat this species may be synonymous with T. pearsei(Creaser) and T. boneti Rioja. If these species provcto be identical, they are almost ccrtainly not troglohites,since these cave regions are so widely separatet]and the troglobitic faunas so distinct.Trichorhina boneti RiojaOniscidae sp. D: Bonet, 1953a:24, 65.La forma aGn al genera Troglophiloscia: Bond,1953a:27, 30, 33.Trichorhina boneti Rioja, 1956:451-456, fig. J5-27;:\lulaik, 1960:83, 140, 1-1,4-147, fig. 618-630;\icholas, 1962:171; Lcmos de Castro, 1964:J;Reddell, 19C>7d:l06; Reddell, 197111:22.Oniscidac, unidentified genus and species: Redddl,1971b:2J (Cueva del Ahuate n. 2 record only).Type.locality.-Cueva de Ahuate numero dos,pucrto de Ahuate, al SO. de Xilitla, San Luis PotosI,.\:Iexico.Distribution.---Known only from the tnw-Iocality.See Fig. 9.Discussion.~This is the most northern record forthe genus in Mcxieo. Schultz (pers. comll1.) has indicatedthat this species may be synonymous with T.pearsei.Trichorhina pearsei (Creaser)Porcellio: Pearse, EI:38a: 13, 15; Pearse, 1945:Ill,166.Porcellio pearsei Creaser, 1938: L60, 162, 163, fig.1-8; Pearse, 1945:166; Rioja, 1953a:286, 295;\Iulaik, 1960:166, 170-171; Nicholas, 1962:171.Porcellio pearsi: Vandel, 1950:206, 207 (erroneousspelling).Trichorhina yucatanensis Mulaik, 1960:83, 140,142, 144, fig. 146-150; Lemos de Castro, 1964:J,2.Trichorhina yucatensis: l'\icholas, 1962:171 (erroneousspelling).Trichorhina pearsei: Lemos de Castro, 1964:1, 2;Reddell, 1971b:22; Reddell, 1977b:229, 239,240,268,270,273,274,276,285.94