before a vowel or h tyl-, combining form repr. Gr. τύλος knob, or τύλη callus, cushion, used in a few terms of zoology. Tylhexactine [see hexactine under HEXA-], a six-rayed sponge-spicule having a knob at the end of each ray. Tyloclad [Gr. κλάδος shoot, branch], a sponge-spicule knobbed at one end and branched at the other. Tylopod [Gr. πούς, ποδ- foot], a. having pads on the digits instead of hoofs; belonging to the Tylopoda, a group of ruminants comprising the camels and llamas (synonymous with Camelidæ); sb. a member of the Tylopoda; so Tylopodous a. Tylostyle [Gr. στῦλος pillar] (also in L. form tylostylus), a sponge-spicule of the form of a rod with a knob at one end (the other end being pointed); also attrib. or as adj.; so Tylostylar, Tylostylote, adjs., pertaining to, or of the form of, a tylostyle.
1909. Cent. Dict. Suppl., *Tylhexactine.
1888. Sollas in Challenger Rep., XXV. p. lv. *Tyloclad. The esactine is tylote and the ecactine cladose.
[1878. Bell, Gegenbaur’s Comp. Anat., 483. In the Tylopoda and Solidungula this end of the ulna has quite disappeared.]
1891. Cent. Dict., *Tylopod, *Tylopodous.
1902. Cassell’s Encycl. Dict., Suppl., *Tylostylar.
1886. R. von Lendenfeld, in Proc. Zool. Soc., 21 Dec., 574. The supporting skeleton, composed of bundles of monaxonid not *tylostyle spicules, is strengthened by spongin. Ibid. Spicules tetraxon, monaxon (tylostylus), or absent.
1887. Sollas, in Encycl. Brit., XXII. 423/1 (Sponges). Polymastidae.—Skeleton consisting of styles radiately arranged and cortical tylostyles.
1886. R. von Lendenfeld, in Proc. Zool. Soc., 21 Dec., 590. Spicules polyact, tetract, lithistid, *tylostylote, or stylote, never cemented with spongin.
