Rhigonematid (Rhigonematida; Nematoda) parasites of Scaphiostreptus seychellarum (Spirostreptida; Diplopoda) in the Seychelles with comments on ovejector structure in Rhigonema Cobb, 1898. Canadian Journal of Zoology, 65(8) 1987: 1889-1897. 1889 [Zoological Record Volume 124]