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Family DaphnidaeWilson (1936) reported seven species of cladoceransof the genera Ceriodaphnia, Daphnia, Moina, andSimocephalus from cenotes in Yucatan. One of these,C. cornuta Sars, has recently been collected in CenoteBolchen, Campeche. Ceriodaphnia lacustris Birge wasreported from Cueva de Los Sabinos, San Luis Potosi(Osorio Tafall, 194.3).Subclass MalacostracaOrder IsopodaThe order Isopoda is the most abundant group tobe found in the waters of Mexican caves and is amongthe more important inhabiting the terrestrial environment.It is also one of the few groups in which thetroglobites outnumber the troglophiles. To date, atotal of 48 species of isopod has been identified fromthe caves of Mexico, Guatemala, and Belize (see Table11). The 32 troglobites are distributed through allfive suborders represented; three of these suborders(Flabellifera, Anthuridea, and Microcerberidea) areknown from Mexico only by troglobites.Table ll.-Summary of cave inhabiting Isopoda.TroglobitesOther SpeciesFlabelliferaCirolanidae 10 0AsellotaAsellidae 5 1Stenasellidae 6 0AnthurideaAnthuridae 2 0Microcerberid eaMicrocerberidae 2 0OniscoideaArmadillidae 0 9Oniscidae 0 1Philosciidae 2 0Porcellionidae 0 3Sphaeroniscidae 1 0Squamiferidae 3 1Trichoniscidae 9 1Total 40 16Suborder FlabelliferaFamily CirolanidaeThe family Cirolanidae is primarily marine, butcavernicolous species are now known from the Mediterraneanregion, East Africa, the greater Caribbeanregion, and Texas and Virginia (U.S.A.). In Mexico itranges from near the United States border into theYucatan Peninsula.Conilera stygia PackardEyeless asellid crustacean: Packard, 1894:732.Conilera stygia Packard, 1900:300-301; Packard,1901:228; Richardson, 1905:116, 120; Banta,1907:78; Chappuis, 1927:72; Van Name, 1936:31, 426-427; Jeannel, 1943:255-256; Bolivar,1950:211, 217, fig. 11; Rioja, 1953a:294; Rioja,1953d:147, 168; Rioja, 1957:447; l\icholas,1962:170; Rioja, 1962:40: Bowman, 1964:233,234, 236, fig. 61; Vandel, 1964:150; Vandel,1965a:120; Cole and Minckley, 1966:17, 21;Reddell, 1967a:24; Straskraba, 1969:22; Reddell,1971b:20; Bowman, 1975: 1."Conilera" stygia: Cole and Minckley, 1972:321.Conilera: Chappuis, 1927: 142.Conilera (part): Bowman, 1975:5,6, fig. 4b.Conylera stygia: Rioja, 1953a:286 (erroneous spelling).Comilera stygia: Rioja, 1953a:293 (erroneous spelling).Type-Iocality.-Well at Monterey (=Monterrey),Nuevo Leon, Mexico.Distribution.-Known only from the type-locality.See Fig. 6.Discussion.-This species was too poorly describedto be accurately identified. The genus Conilera is exclusivelymarine; when rediscovered, this species willprobably prove to belong in the genus Speocirolana.Creaseriella anops (Creaser)Cirolanid isopods: Pearse, 1933:110.Cirolana anops Creaser, 1936:117-120, 131, fig. 1-12;Pearse, 1936d:24; Van Name, 1936:523: Creaser,1938:159-160, 164; Van Name, 1940:134, fig. 26;Jeannel, 1943:255; Osorio Tafall, 1943:55; Pearse,1945:165; Anonymous, 1947:128; Bolivar, 1950:211, 217, 218, fig. 11; Cardenas Figueroa, 1950:156; Villalobos, 1951:215; Bonet, 1953b:241;Rioja, 1953a:286, 293, 294; Rioja, 1953d:147;Delamare Deboutteville, 1960:648.Cirolana: Creaser, 1938:159; Pearse, 1938a:13, 15;Pearse, 1945:111, 166; Cardenas Figueroa, 1950:157.Cirolana (part): Rioja et al., 1961:315.Cirolana ampos: Carreno, 1959:24 (erroneous spelling).Creaseriella anops: Rioja, 1953d:162, 164-166, 168,fig. 36-58; Nicholas, 1962:170; Rioja, 1962:40;Bowman, 1964:236, fig. 61; Vandel, 1964:151;Vandel, 1965a:121; Cole and Minckley, 1970:76;Reddell, 1971b:21; Reddell, 1977b:229, 239,240,251,253,255,258,260,262,263,264,266,84