Terrestrial nematodes from Jan Mayen Author Allgén, C. A. text Annals and Magazine of Natural History 1953 12 6 665 688 journal article 10.1080/00222935308654469 10811051 Prismatolaimus dolichurus de Man. (Fig. 4.) de Man, 1884 , pp. 80-81, pl. xii, figs. 47, 47 a (head). Dimensions.—A4. Body -length= 0.8 0 9 mm ., max. width= 0.018 mm , oesophagu s =0.1 9 7m m., tail = 0. 2 1 3 m m., α=44.94, β=4.11, γ =3.8 0. Prismatola imus dolichurus de Man. a. anterior end 1/12, ok. 3, ×450, b, tail obj. 7, ok. 3, ×270, E5. Body - lengt h = l. 2 1 6m m., max. width = 0. 0 2 8m m, oesophagu s = 0.254 mm ., tail = 0.443 mm ., vulva= 0.475 mm ., α=43.43, β=4.79, γ =2.74, V =39.06 per cent. The b o d y is v e r y slehder. Cephalic bristles s i t u a t e d submedially, as large as or only a little shorter t h a n the head-diameter a t the same level. The buccal c a v i t y is short, large, cylindrical, a b o u t twice as deep as broad. The (esophagus increases almost imperceptibly t o w a r d s the posterior end. The tail is exceedingly elongated, v e r y slender, posteriorly pointed. The v u l v a is s i t u a t e d in front of the middle of the body. Female organs paired with short gonads, the anterior of which is reflexed dorsally, the posterior gonad ventrally.