70 ASCAROIDEA 



Hab. Soil. 



Genotype : I. radicicolus Cobb, 1913. 



Cobb, 1913, Journ. Washington Acad. Sci., iii, 434, 439; 

 Micoletzky, 1922, Arch. f. Natnrg., Abt. A, Ixxxvii, 541. 



9. Tylopharynx de Man, 1876. 



Cuticle with fine transverse striations and with longitudinal 

 striations, without bristles. Head slightly distinct, knob-like, 

 without lips, papillae or bristles. Lateral organs unknown. 

 Stylet consists of three rods, fused anteriorly and knobbed 

 posteriorly. Caudal end of male with numerous subventral 

 preanal and postanal papillae. An accessory piece present. 

 Female genital tubes paired, opposed, reflexed. Caudal 

 glands absent. 



Hab. Soil. 



Genotype : T. striata de Man, 1876. 



de Man, 1876, Tijdschr. Ned. dierk. Vereen., ii, 116; 1884, 

 Die frei . . . lebenden Nematodes d. Niederl. Fauna, 131 ; 

 Micoletzky, 1922, Arch. f. Naturg., Abt. A, Ixxxvii, 432. 



Subfam. 2. DORYLAIMINAE nov. 



Oesophagus without median bulb, but usually with a more 

 or less distinct posterior swelling, which sometimes forms a 

 bulb. 



1. Dorylaimus Dujardin, 1845. 



Syn. Antholaimus Cobb, 1913; Nygolaimus Cobb, 1913; 

 Actinolaimus Cobb, 1913 ; Discolairmis Cobb, 1913 ; Dorylai- 

 mellus Cohh, 1913; Axonchium Cohh, 1920; Doryllium Cohh, 

 1920; Longriioras Micoletzky, 1922. 



Cuticle usually unstriated, without lateral alae or bristles. 

 Head separated by a constriction from body, usually with six 

 lips, each bearing two papillae, but without bristles. Lateral 

 organs inconspicuous, probably usually slit-like. Stylet 

 tubular, not knobbed behind. Oesophagus swollen behind, 

 but without distinct bulb. Caudal end of male with a median 

 row of preanal papillae. Postanal papillae present in both 

 sexes. Spicules fairly stout. Two rod-like accessory pieces 

 usually present, closely applied to the spicules. Testes 

 paired, opposed, outstretched. Female genital tubes almost 

 always paired, opposed, reflexed ; occasionally single, posterior. 

 Caudal glands and spinneret absent. 



Hab. Soil, fresh water, on plants or in decaying substances. 

 Genotype : probably D. stagnaUs Dujardin, 1845, according 

 to Stiles' & Hassall (1905). 



Dujardin, 1845, Hist. nat. des Helminthes, Paris, 230 ; Cobb, 



