Terrestrial nematodes from Jan Mayen Author Allgén, C. A. text Annals and Magazine of Natural History 1953 1953-12-31 12 6 665 688 journal article 290755 10.1080/00222935308654469 7b450990-9514-4a84-8d2b-3476f8b8cc28 10811051 Plectus granulosus Bastian. Bastian, 1865 , p. 120, pl. x, figs. 93-94. de Man, 1884 , pp. 107-108, pl. xvi, fig. 65, P. granulosus . de Man, 1884 , pp. 108-109, pl. xvi, fig. 66, P. schneideri . Brakenhoff, 1913 , pp. 291-293, pl. ii, figs. 11-12. Micoletzky, 1914 , pp. 466-468. Cobb, 1914 , pp. 53-54, p]. iv ~g. 10, P. tubifer . Hofm ä nner-Menzel, 1914 , pp, R 2-23, figs. 2-4, P. blanci . Hofm ä nner-Menzel, 19] 5 p p 68-169, P. granulosus . Hofmanner-Menzel,] 9J5 , pp 172- 173, pl. vi, fig. 17 a-d, P. blanci . Steiner, 1916 (1) , pp. 323- 324 Steiner, 1916 (2) , p. 53. Micoletzky, 1922, pp. 235-240. I t is necessary to remark only, that in contrast with the male described b y de Man, which shows three tubular ducts in fi'ont of the anus (compare de Man, fig. 65), the males in the present collection are provided with only t w o supplementary ducts, the hindmost d u c t not being developed. The distance b e t w e e n the t w o ducts is smaller than the distance between the first t w o ducts in the specimens o f de Man. The h e a d is more strongly d e m a r c a t e d t h a n in the Dutch specimens, a n d the anterior p a r t o f the accessory piece is more strongly developed t h a n in de Man's figure.