Alaimus arcuatus Thorne, 1939 .

One female. Dimensions: L = 1.02 mm; a = 35; b = 4.9; c = 18; V = 38 21.

Tail length equal to four anal body widths; anus very indistinct. Tail tapering strongly over the proximal two-thirds; distal part curved strongly to ventral side; terminus narrowly rounded. Body tapering markedly from middle to both ends. An intra-uterine egg measures 76 x 28 jx.

Sample 26.