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locality and in association with ostracods and amphipods(Mayaweckelia yucatanensis). They were observedto rest on the floor of the pool and when disturbedwould swim straight up or away at an angle.In Cenote de Cantemo they inhabited a small poolcontaining much organic debris and polluted by oil.Typhlatya campecheae is most closely related to T.pearsei.Typhlatya mitchelli Hobbs and HobbsTyphlatya mitchelli Hobbs and Hobbs, 1976:2-6, 10,14, 15, 16,20,21, fig. 1-2; Hobbs et al., 1977:6,8, 11, 12, 25, 32, 39, 40, 41, 45, fig. 12-13; Holthuis,1977:174, 175-181, fig. la-i, 2; Reddell,1977b:230, 239, 240, 251, 255, 256, 260, 262,263, 268, 279, 281, 289, 291,292,293; Hobbs,1979:618,620-625,626,629, fig. 1-2.Typhlatya (part): Hobbs et al., 1977:5, 13,32.Type-iocality.-Cenote Kabahchen, Mani, Yucatan,Mexico.Distribution.-Known from caves in Quintana Rooand Yucatan. See Fig. 14.Records.-Quintana Roo: Cueva del Fermin andActun Ha; Yucatan: Cenote Aka Chen, Cenote Calchuhuim,Cenote Chen Mul, Cenote Chun Kapoc,Cenote de la Culebra, Cenote Kabahchen, ActunKaua, Cenote de Orizaba, Cenote de la Paca, Cenotedel Pochote, Cenote de Sodzil, Grutas de Tzab-Nah,Cenote Xkeken, Cenote Xtacabiha, and Cenote Zaci.Discussion.-This species is s)'mpatric with T.pearsei in several caves. It possesses some characterswhich make it intermediate between the Cuban T.garciai Chace and the Puerto Rican T. monae Chaceand the Galapagos Islands T. galapagensis Monod andCals. In most of the above caves it was taken fromsmall pools.Typhlatya pearsei CreaserBlind shrimps (part): Pearse, 1933:110.Typhlatya pearsei Creaser, 1936: 128-130, 131, fig.31-41; Pearse, 1936c:24; Creaser, 1938:162-163,164; Chace, 1942:100; Chace, 1943:30, 32;Pearse, 1945:169, 170, fig. 31-41; Cardenas Figueroa,1950:156; Villalobos, 1951:215; Rioja,1953a:286, 292; Chace, 1954:319, 323; Balss,1955:1310; Holthuis, 1955:26; Holthuis, 1956:52; Nicholas, 1962:173; Chace and Hobbs, 1969:20-21; Straskraba, 1969 :25; Botosaneanu andHolthuis, 1970:122, 123, 127; Monod and Cals,1970:69, 73, 78, 82, 84, 85, 93, 94, 100, fig. 67;Reddell, 1971b:25; Rioja, 1971:524; Chace, 1972:15; Chace and Manning, 1972:17; Croizat et al.,1974:275, fig. 2; Holthuis, 1974:141; Silva Taboada,1974:54; Monod, 1975:99, fig. 1; Hobbs andHobbs, 1976:1, 10-14, 15, 16, 20, 21, fig. 5-6;Hobbs et al., 1977:6, 7, 9, 12, 15,24,32,39,43­45, fig. 3, 15-16; Holthuis, 1977:174-175, 176,180, 181, fig. Ij; Reddell, 1977b:230, 239, 240,241, 243, 247, 251, 252, 253, 258, 260, 262,266,277,278,281,283,285,293;Hobbs,1979:618,621, 624, 625~27,628, 629,630,631,fi~1, 3A, 3D.Typhlatya: Hubbs, 1936:168; Creaser, 1938:159;Pearse, 1938a:13, 15; Pearse, 1945:111, 167;Argano,1972b:33.Typhlata: Cardenas Figueroa, 1950: 157 (erroneousspelling).Typhlatya pearsi: Rioja, 1953a:293; Delamare Deboutteville,1960:648; Vandel, 1964:178; Vandel,1965a:139; Peck, 1974a:21; Juberthie-Jupeau,1977:108 (erroneous spelling).Typhlatya pearsii: Rioja, 1971:1150 (erroneous spelling).Typhlatya (part): Croizat et al., 1974:276; Juberthie,1974:81; Monod and Cals, 1970:69,72,73,85,87,91,97,99, 101, 102; Rosen, 1976:441, fig. 5E.Type-locality.-Balam Canche Cave (=Grutas deBalankanche), 4.8 kilometers east, 0.8 kilometerssouth Chichen ltza, Yucatan, Mexico.Distribution.-Known from caves in Campeche,Quintana Roo, and Yucatan. See Fig. 14.Records.-Campeche: Grutas de Monte Bravo andGrutas de San Antonio; Quintana Roo: Cueva Coop,Cueva del Fermin, Cenote de Juan Coh, Pozo de SanMartin, Cenote de Santo Domingo, and Cenote deTos Vidol; Yucatan: Cenote de las Abejas, Grutas deBalankanche, Cenote Calchum, Actun Chac, Cenotede Hoctun, Cenote Kabahchen, ActUn Kaua, ActunOkobichen, Cenote del Pochote, Cueva de San Isidro,Cueva de Santa Elena, Grutas de Tzab-Nah, and CenoteXtacabiha.Discussion.-The genus Typhlatya is known fromAscension Island, the Galapagos Islands, Cuba, DominicanRepublic, Puerto Rico, and the Yucatan Peninsulaof Mexico. This species is most closely related toT. mitchelli. The record by Nicholas (1962) of thisspecies in "Cueva del Ponte" is probably an error forCenote del Pochote.Family PalaemonidaeSix species of palaemonid shrimp are troglobites inthe caves of Mexico. An additional three species havebeen found in caves as either troglophiles or trogloxenes.Other troglobitic palaemonids are known fromAssam, the Mediterranean region, the southern UnitedStates, and Cuba.107