126 ASCAROIDEA 



ventral teeth are also present in a recess in the pharyngeal 

 wall. Oesophagus usually without a bulb.* Ocelli present 

 in marine forms. Caudal end of male with or without papillae, 

 and occasionally with supplementary organs. Four accessory 

 pieces, in two pairs, present. Testis single or paired. Female 

 genital tubes paired, opposed, reflexed. Caudal glands and 

 spinneret usually present. 



Hab. Marine, in brackish or fresh water, or in soil. 

 Genotype : C ocellatus Bastian, 1865. 



Bastian, 1865, Trans. Linn. Soc. London, xxv, 162 ; Cobb, 

 1913, Journ. Washington Acad. Sci., iii, 434; 1917, Contr. 

 Sci. Nematol, v, 118; 1918, in Ward & Whipple, Freshwater 

 Biology, 489; Micoletzky, 1922, Arch. f. Natxcrg., Abt. A, 

 Ixxxvii, 375, 377. 



We have included certain genera and subgenera in 

 the synonymy of C yatholaimus owing to their insufficient 

 characterization. 



36. Chromadora Bastian, 1865. 



Sjm. Acanthopharynx Marion, 1870 (?); Ethmolaimus de ' 

 Man, 1880; Euchromadora de Man, 1886; Graphonema Cobb, 

 1898 ; Chromadorissa Filipjev, 1917 ; Spilophorella Filipjev, 

 1917; Chromadorina Filipjev, 1918; Chromadorella Filipjev, 

 1918 ; Spilipherella Filipjev, 1918 ; Odontocricus Steiner, 

 1918; Polysigma Cobb, 1920; Ptycholaimellus Cobb, 1920; 

 Chrmnadorita Filipjev, 1922 ; Prochromadora Filipjev, 1922 ; 

 Endolaimus Filipjev, 1922. 



Cuticle striated, usually with submedian bristles. Lateral 

 alae usually absent, except in marine forms. Head without 

 lips, but with six to twelve papillae. Submedian cephalic 

 bristles usually present, lateral cephalic bristles absent. 

 Lateral organs in the form of grooves or transversely oval, 

 rarely definitely spiral. Pharynx typically in two portions, 

 the anterior wide, the posterior funnel-shaped. The anterior 

 portion has longitudinal rod-like thickenings (or folds?) in 

 its wall, and usually contains a dorsal tooth, and sometimes 

 two subventral teeth. Oesophagus with a more or less 

 distinct posterior swelling, but usually without a bulb. Caudal 

 end of male with or without preanal papillae. Postanal 

 papillae absent. Spicules sometimes unequal and dissimilar. 

 Accessory piece complex, consisting of a posterior, a median, 

 and two lateral portions. Testis usually single. Female 

 genital tubes paired, opposed, reflexed. Caudal glands 

 present. Spinneret present or absent. 



* According to Cobb there is no oesophageal bulb. Micoletzky, 

 however, states that a bulb is usually present. The species figured 

 by Bastian do not appear to possess bulbs. 



