GULF OF MEXICO 



315 



4. Cophoiichus ocellalus Cobb, 1920. Locality: Kingston 



Harbor, Jamaica. 



5. Anlicoma timalis Ba-stian, 1865. Locality: Tobago, Rr. 



W. Indies. Reported by: AllgiSii, 1947. Other 

 localities: Beaufort, N. C, coasts of Holland, Bel- 

 gium, Franc?, England, Germany, 

 f). Paranlicowa longicaudata Chitwood, 1951 (tig. 63, E). 

 Locality: Aransas Bay, Tex. 



7. Leplofomatum bacillatum (Kberth, 1863) Bastian, 1865. 



Locality: Tobago, Br. W. Indies. Reported by: 

 Allg^ii, 1947. Other localities: Mediterranean Sea. 



Subfamily Oxystomininae (Micoletzky, 1924) 



Amphids usually elongate, often internally tuboid ; stoma 

 unarmed; esophagus conoid, with weak musculature; 

 cephalic setae usually six, post-cephalic four; preanal 

 supplement absent. 



8. A'emanema simplex Cobb, 1920. Locality: Port Royal, 



Jamaica. 



9. Schistodera exilis Cobb, 1920. Locality: Port Royal, 



Jamaica. 



10. Porofomas(n(j(a Cobb, 1920. Locality : Biscayne Bay, 



Fla. 



Family ONCHOLAIMIDAE Baylis and Daubney, 1926 



Stoma capsulifcrm, only the posterior surrounded by 

 esophageal tissue: stomatorhabdions heavily sclerotized. 



Subfamily Oncholaiminae Micoletzky, 1922 



Ocelli absent, diffuse pigment spots sometimes present; 

 esophagus cylindrical, not crenate or conoid, vesiculate, 

 or multibulbar; supplements absent or pedunculate. 



11. Anoplostoma helerurum (Cobb, 1914) Chitwood, 1951. 



Locality: Ocala, Fla. 



12. Anoplostoma copano Chitwood, 1951 (fig. 63, C, E)). 



Locality: Copano Bay, Tex. 



13. Ponlonema valviferum Chitwood, 1951. Locality: 



Rockport, Tex. 



14. Oncholaimus tohagoensis Allg6n, 1947. Locality: To- 



bago, Br. W. Indies. 



15. Prooncholaimus aransas Chitwood, 1951. Locality: 



Aransas Bay, Tex. 



16. Viscosia macramphida Chitwood, 1951 (fig. 63, B). 



Locality: Aransas Bay, Tex. 



17. Viscosia papillala Chitwood, 1951. Locality: Aransas 



Bay, Tex. 



18. Viscosia glabra (Bastian, 1865) de Man, 1890. Local- 



ity: Tobago, Br. W. Indies. Reported by: Allg6n, 

 1947. Other localities: Coasts of northern Europe 

 and Mediterranean; very widely distributed. 



Subfamily Eurystomininae (Filipjev 1934) 



Ocelli, if present, with pigment and lens. Esophagus 

 conoid to multibulbar, forepart of lumen not notably 

 tuboid; large subventral tooth not remarkably tine; two 

 (rarely or 1) cup-like sclerotized preanal supplements. 



19. Eurystomina americana Chitwood, 1936. Locality: 



Rockport, Tex. Reported by: Chitwood, 1951. 

 Other localities: Shackleford's Banks, N. C. 



20. Eurystomina minutisculae Chitwood, 1951 (fig. 64, E, 



F). Locality: Aransas Baj', Tex. 



21. Bolbella tobagoense Allg6n, 1947. Locality: Tobago, 



Br. W. Indies. 



Subfamily Enchelidiinae (Micoletzky 1924) 



Stoma absent in males; stomatal walls distinctly jointed 

 in females; with large needle-like tooth; ocelli, if present, 

 with pigment and lens not closely associated; esophagus 

 conoid to multibulbar with forepart of lumen notably 

 tuboid; well-developed supplements absent. 



22. Enchelidium tenuicolle Eberth, 1863. Locality: To- 



bago, Br. W. Indies. Reported by: Allg6n, 1947. 

 Other localities: Mediterranean. 



23. Illium exile Cobb, 1920. Locality: Jamaica. 



24. Catalaimtis acuminata Cohh, 1920. Locality: Biscayne 



Bay, Fla. Other localities: New Caledonia. 



Order CHROMADORIDA 



Three part esophagus, commonly with bulb (rarely with 

 pigeon-wing valve) , sometimes clavate, very rarely cylin- 

 droid; amphids spiral, shepherd's crook, circular, vesicu- 

 late, transversely elliptical or very rarely pore-like (Rhab- 

 dolaimus, Syringolaimus) ; Ovaries outstretched or reflexed. 



Suborder Chromadorina 



Tri-radiate or vertically flattened esophago-intestinal 

 valve, usually very short; stoma, if well-developed, con- 

 taining a large dorsal tooth, two jaws, three jaws, or six 

 inwardlj'-acting teeth; 12 stomatal rugae usually present; 

 stoma surrounded by esophageal tissue; preanal supple- 

 mentary organs usually present; tuboid, papilloid, cup- 

 like, or stirrup-like; ovaries reflexed. Mostly marine, 

 some fresh water forms. 



Superfamily CHROMADOROIDEA Stekhoven and de 

 Coninck, 1933 



Amphids spiral, circular, or reniform; cuticle striated, 

 usually punctate but not annulate; helmet absent; ambu- 

 latory and paired glandular setae absent. Marine and 

 fresh water. 



Family CHROMADORIDAE Filipjev, 1917 



Amphids rather far forward on head: unispiral, trans- 

 versely ellipsoid, or kidney-shaped; cuticle coarsely punc- 

 tate; 12 labial rugae, weakly to moderately developed; 

 stoma surrounded by esophageal tissue, teeth at anterior 

 end; usually internal circle of 6 cephalic papillae and 

 double external circle of 6 papillae and 4 setae ; esophageal 

 bulb usually present ; esophago-intestinal valve extremely 

 small; cup-like (i. e., chromadoroid) supplements; 2 re- 

 flexed ovaries. Marine and fresh water. 



Subfamily Chromadorinae Micoletzky, 1922 



Characters of family. 



25. Rhips ornata Cobb, 1920. Locality: Ocean Beach, 



Fla. 



26. Euchromadora striata (Eberth, 1863) Filipjev, 1917. 



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

 wood, 1951. Other localities: Atlantic coast of 

 Europe. 



