. The Annals and magazine of natural history; zoology, botany, and geology. ptical section, it might quite easily be imagined that thiswas a correct interpretation of the structure. By rolling thespecimen over, however, under a cover-glass, in such a waythat first one lip and then the other can be focussed separately, * Since writing this paper, 1 have received several furtlier examples ofT. tiara from a species of Varanus in For generic and specific diagnoses see below (p. 230). Nematode Genus Tanqua, R. Blanchard. 225 it becomes apparent that each lip has in reality only three tee
. The Annals and magazine of natural history; zoology, botany, and geology. ptical section, it might quite easily be imagined that thiswas a correct interpretation of the structure. By rolling thespecimen over, however, under a cover-glass, in such a waythat first one lip and then the other can be focussed separately, * Since writing this paper, 1 have received several furtlier examples ofT. tiara from a species of Varanus in For generic and specific diagnoses see below (p. 230). Nematode Genus Tanqua, R. Blanchard. 225 it becomes apparent that each lip has in reality only three teeth on its anterior border. The anterior lobe of eachlip (ng. 1, L.), which carries the teeth, is twisted slightly toone side, in such a way that its teeth can interlock with thoseof the otlier lip. The teeth of each lip are, in fact, asym-metrically disposed with regard to the longitudinal axis ofthe animal. Tlie teeth are, in reality, folds of thickenedcuticle, and are shown in optical section in fig. 1. Von Linstow is, I think, in error in stating that the two Fiy-. Tanqua tiara. Head of an example from Varamis , cervical gland: L., lip. cervical glands on either side unite anteriorly to form acommon duct; the duct of each gland appears to open sepa-rately upon tlie anterior surface of one of tlie four striatedswellings at the base of the lips. Another point in which von Linstows accourit seemsinaccurate is the number of papillae on the tail of tlie mentions and figures (1904) two preanal, one largeparanal, and three postanal pairs of papillae. In the speci-mens which 1 have examined there are two additional pairs 226 Mr. H. A. Baylis on the of smaller papillae—one (fig. 2, /) just in front of, andslightly ventral to, the large paranal pair, and another(fig. 2, 4) in a similar position on the body, between theparanals and the most anterior of the large postanals. Thereare thus, in all, eight pairs of papillae, four pairs being post-anal,
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