. Fresh-water biology. Freshwater biology. .5 .J 48 -M- 99. _. Habitat: Algae, Potomac River, Wash- ington, D. C. Fig. 779. Dorylaimus fecundus. At the right, head and tail of a female; at the left, tail end of a male, a, apex of spear, showing oblique opening; b, papilla of the anterior circlet: c, papilla of the posterior circlet; d, guiding-ring for the spear; e, commencement of the esophagus, /, pre-rectum; g, rectum; h, anus; i, anal muscles; j, caudal papilla; k, outer cuticula; /, inner cuticula; m, muscular layer; », pre- rectum; o, one of the numerous oblique cop
. Fresh-water biology. Freshwater biology. .5 .J 48 -M- 99. _. Habitat: Algae, Potomac River, Wash- ington, D. C. Fig. 779. Dorylaimus fecundus. At the right, head and tail of a female; at the left, tail end of a male, a, apex of spear, showing oblique opening; b, papilla of the anterior circlet: c, papilla of the posterior circlet; d, guiding-ring for the spear; e, commencement of the esophagus, /, pre-rectum; g, rectum; h, anus; i, anal muscles; j, caudal papilla; k, outer cuticula; /, inner cuticula; m, muscular layer; », pre- rectum; o, one of the numerous oblique copu- latory muscles; p, one of the ventral series of male supplementary organs; q, ejaculatory duct; r, pair of pre-anal papillae; s, retractor muscles of the spicula; /, muscular layer; m, right spiculum; t, accessory piece. (After Cobb.) 12 (11) Pharynx with complicated radiate framework, male supplementary organs in fascicles Actinolaimus Cobb. Genus represented in all parts of th world, and proposed for species similar to Dorylaimus labyrinthostonius, in which the pharynx is more or less immobile, radially striated and elabo- rately constructed. Representative species. Actinolaimus radiatus Cobb 1913. e. .3 6 4 [9 â¢Â» «. ,.- ^ 9 ] 5 17 2 i~4~ 'â¢*" The esophagus begins Cr â ' "â "â -"- "' < 1 m, as a tube about one- ^" 'â '<â 'â 'â ""'* â third as wide as the cor- responding portion of the neck. It continues to have this width for some distance. Considerably in front of the middle of the neck it expands rather suddenly. The cells of the brownish intes- tine contain granules of variable size, arranged so as to give rise to a rather obscure tessellation. The tail of the female is concave- conoid to the hairfine terminus. The tail of the male is hemi- spherical-conoid. Immediately in front of the anus are two ven- tral papillae placed side by side. In addition to these there are ventral papillae arranged in three
Size: 993px × 2517px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
