318 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



81. Sabatieria hilarula de Man, 1922 (fig. 65, G, H). 



Locality: Aransas Bay, Tex. Reported by: Chit- 

 wood, 1951. Other localities: Coasts of Holland, 

 Germany, Norway, France, and North Carolina. 



Superfamily MONHYSTEROIDEA Stekhoven and de 

 Coninck, 1933 



Amphids circular; stoma very diverse; cephalic setae 

 4 (?), 6, 10, 12, 16, 18, or more; ends of esophageal radii 

 convergent; esophago-intestinal valve usually spheroid to 

 cylindrical; outstretched ovaries. Marine or fresh water. 



Family MONHYSTERIDAE Oerley, 1880 



Stoma not styletiform; radial muscles of esophagus 

 diffuse, without cuticular attachment points; esophagus 

 cylindrical, without bulb. 



Subfamily Monhysterinae Micoletzky, 1922 



Cuticle not ridged; stoma not sclerotized, usually conoid; 

 three low lips; papilloid sensory organs of internal circle; 

 usually one anterior outstretched ovary. Marine or 

 fresh water. 



82. Diptolaimella ocellata Chitwood, 1951. Locality: 



Aransas Bay, Tex. 



83. Cytolaimium exile Cobb, 1920. Locality: Biscayne 



Bay, Fla. 



84. Monhyslera parva Bastian, 1865. Locality: Cedar 



Bayou, Tex. Reported by: Chitwood, 1951. Other 

 localities: Northern coast of Europe, Mediter- 

 ranean and Red Seas. 



85. Monhyslera socialis Biitschli, 1874 (fig. 65, C, D). Lo- 



cality: Cedar Bayou, Tex. Reported by: Chitwood, 

 1951. Other localities: Northern coast of Europe. 



86. Monhyslera lobagoensis AUg^n, 1947. Locality: To- 



bago, Br. W. Indies. 



87. Therislus hiitschlioides Chitwood, 1951. Locality: 



Aransas Bay, Tex. 



88. Therislus etaboralus Chitwood, 1951 (fig. 65, I-K). 



Locality: Copano Bay, Tex. 



Subfamily Xyalinae Chitwood, 1951 



Cuticle coarsely striated; stoma sometimes sclerotized; 

 cephalic setae 6 plus 12; 6 or 3 (?) lips. Marine. 



89. Xenolaimus slrialus Cobb, 1920. Locality: Biscayne 



Bay, Fla. 



Family LINHOMOEIDAE Filipjev, 1929 



Stoma not styletiform; esophageal radial muscles con- 

 centered, often with cuticular attachment points; esoph- 

 agus usually with distinct bulb. Esophago-intestinal 

 valve usually very large; one or two outstretched ovaries. 

 Usually marine. 



Subfamily Linhomoeinae Filipjev, 1929 



Cuticle almost smooth; stoma short with weak to 

 moderate sclerotization. Marine. 



90. Calanema exile Cobb, 1920. Locality: Port Royal, 



Jamaica. 



91. Anticyathus tenuicaudalus Cobb, 1920. Locality: 



Miami, Fla. 



92. TerscheUingia longicaudala de Man, 1907. Locality. 



Copano Bay, Tex. Reported by: Chitwood, 1951. 

 Other localities: Northern coast of Europe. 



93. Monhyslrium wihoni (Baylis, 1915) Cobb, 1920. 



Locality: Jamaica and Puerto Rico on gills of 

 Gecnrcinus ruricola and G. taleralis. Reported by: 

 Baylis, 1915; Cobb, 1920; and Chitwood, 1935. 



94. Monhyslrium Iransitans Cobb, 1920. Locality: Ja- 



maica and Puerto Rico, on gills of Qecarcinus 

 ruricola and G. lateralis. Reported by: Cobb, 1920 

 and Chitwood, 1935. 



95. Halinema spinosum Cobb, 1920. Locality: Biscayne 



Bay, Fla. 



96. Melalinhomoeus selosus Chitwood, 1951. Locality: 



Aransas Bay, Tex. 



97. .Si/nonemoirfes of/ira Chitwood, 1951. Locality: Rock- 



port Harbor, Tex. 



98. Anlicyclus exilis Cobb, 1920. Locality: Bath Tub 



Springs, Jamaica. 



99. Crystallonema fuscacephalum Cobb, 1920. Locality: 



Miami, Fla. 



100. Linhomoella exilis Cobb, 1920. Locality: Biscayne 



Bay, Fla. 



Subfamily Sphaerolaiminae Filipjev, 1924 



Stoma cylindrical to globoid, heavily sclerotized. 



101. Tripylium carcinicolum (Baylis, 1915) Cobb, 1920. 



Locality: Jamaica, on gills of Gecarcinus ruricola 

 and Cardisoina guanhumi. Reported by: Baylis, 

 1915 and Cobb, 1920. 



102. Tripylium carcinicolum var. calkinsi Chitwood, 1935. 



Locality: Puerto Rico, gills of Gecarcinus lateralis. 



103. Halanonchus macrurus Cobb, 1920 Locality: Bis- 



cayne Bay, Fla. 



GEOGRAPHIC DISTRIBUTION 



Very few of the species thus far described from 

 the Gulf and adjoining areas have been encount- 

 ered by more than one worker so that discussions 

 of geographic distribution are Uable to consider- 

 able error. SpUophorella paradoxa has been 

 reported from numerous localities on the coast 

 of northern Europe, the North American Atlantic 

 coast from Massachusetts to North Carolina, as 

 well as from Tobago, British West Indies, and 

 Aransas Bay, Texas. Syringolaimus smarigdus 

 has been reported from Massachusetts and Texas. 

 Both feed on algae, and it may be that their dis- 

 tribution is governed by the movement of the 

 algae in oceanic currents. Onchium ocellatum 

 was reported from Massachusetts and Florida, 

 and Alaimella cincta was reported from Florida 

 and Texas. Two species were reported as as- 

 sociates of land crabs in Jamaica and Puerto 

 Rico, though the species of hosts appear to differ 

 in the two localities. Two species were reported 

 from North Carolina and Texas, seven species 

 from Europe and Texas and seven species from 

 Europe and Tobago, British West Indies. A 



