ONCHOLAIMINAE 127 



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

 Genotype : C. vulgaris Bastian, 1865. 



Bastian, 1865, Trans. Linn. Soc. London, xxv, 167 ; de Man, 

 1888, Mem. Soc. Zool. France, i, 47 ; Cobb, 1918, in Ward & 

 Whipple, Freshioater Biology, 490; Filipjev, 1917, Rev. Zool. 

 Busse, Moscow, ii, 29; 1918, Trav. Lab. Zool., Stat. Biol. 

 Sebastopol, Ser. II, No. 4, 226, 256 ; 1922, Act. Inst. Agronom. 

 Stauropol., i, 138; Micoletzky, 1922, Arch. f. Naturg., Abt. A, 

 Ixxxvii, 383. 



The genera Chromadora and Etichromadora both have the 

 same genotype. Bastian's selection of vulgaris as type of 

 Chromadora (1905) was actually preceded by de Man's selection 

 of the same species as type of Euchromadora (see Stiles & 

 Hassall, 1905, U.S. Dept. Agric, Bur. Anim. Indust. Bull. 

 79, p. 94). The distinguishing characters of the two genera 

 do not appear to be of great importance, and, since it seems 

 probable that Bastian based his genus largely upon the 

 species which he eventually selected as tjrpe, we regard 

 Euchromadora as untenable. A considerable number of 

 genera or subgenera proposed for the reception of slight 

 variants of Chromadora are here included in the synonymy 

 of that genus. 



37. Parachromadora Micoletzky, 1914. 



Syn. Triodontolaimus Micoletzky, 1913, nee de Man, 1893. 



Cuticle striated, with four submedian rows of bristles. 

 Lateral alae absent. Head not distinct, without lips but 

 with bristles. Lateral organs spiral. Pharynx elongate, 

 thick-walled, prismatic or cup-shaped. Anteriorly it is 

 stiffened by ten to twelve longitudinal rods. Three teeth 

 present, two subdorsal and one ventral. The latter may be 

 contained in a pocket near the base of the pharynx. 

 Oesophagus with a posterior bulb. Caudal end of male with 

 a median ventral row of twelve or thirteen bristle-bearing 

 preanal papillae. The accessory piece appears to be double. 

 Testes paired. Female genital tubes paired, opposed, out- 

 stretched. Caudal glands and spinneret present. 



Hab. Fresh water. 



Genotype : P. [Triodontolaimus] alpina (Micoletzky, 1913). 



Micoletzky, 1913, Sitz. k. Akad. Wiss., Wien, cxxii, 117; 

 1914, Zool. Jahrb., Syst., xxxvi, 492. 



Micoletzky has proposed the subgenus Parachromadora, of 

 the genus Chromadora, to replace his genus Triodontolaimus, 

 which was preoccupied, as the examination of male specimens 

 led him to believe that a special genus was unjustified. In 

 view of the unusual disposition of the pharyngeal teeth we 



