. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Orcfan in a 8p{der. 231 wlien their significance is protective they are equally well developed in both sexes, and appear at a very early age in the life-history of the individual *.. Stridulating-organ in the male of Cavihrnlyea antipodiana (White). Fig. 1.—Dorsal view of the organ and adjacent parts, a, posterior region of carapace; 6, anterior region of abdomen; c, heart-shaped horny tooth ; rf, cavity with arched ridges ; ^, horny plate of pedicel. Fig. 2.—Partially diagram
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Orcfan in a 8p{der. 231 wlien their significance is protective they are equally well developed in both sexes, and appear at a very early age in the life-history of the individual *.. Stridulating-organ in the male of Cavihrnlyea antipodiana (White). Fig. 1.—Dorsal view of the organ and adjacent parts, a, posterior region of carapace; 6, anterior region of abdomen; c, heart-shaped horny tooth ; rf, cavity with arched ridges ; ^, horny plate of pedicel. Fig. 2.—Partially diagrammatic side view of the organ and adjacent parts, the cavity with its arched ridges being represented as seen in section. Lettering as in fig. 1, with the addition of e, stigma of pulmonary sac, and/, muscular scars. Upon working through some of the spider material con- tained in the collection of the British Museum, I chanced * I am not aware whether the stridulating-organs of the Theridiidfe and Linyphiida) are present in immature members of the male sex or whether they are developed only at the period of the last moult, when sexual maturity is attained. If, as in the case of the Mygalomorphfe, they are practically as perfect in the young as in the adult, it seems to me that the evidence of their being solely of a sexual function will be considerably weakened. But if, on the other hand, they appear, like typical sexual characters, either only just before or simultaneously with the attainment of maturity, there will, I thinlc, be no reasonable grounds for doubting that they are exclusively of sexual Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London, Taylor and Francis, Ltd
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
