. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 422 N. C. PANT AND G. FRAENKEL. ' \TYvm. FIGURE 2. Transverse section through two lobes of the mycetom of the Stegobium pamccmn larva, showing location of symbionts in the mycetom and lumen of the intestine. OBSERVATIONS AND EXPERIMENTS 1. Mycetoms and symbionts The mycetoms of Lasiodcnna scrricorne are similar to those of Stegobium pani- ccmn which have already been described several times (Karawaiew, 1899; Buchner, 1912; Heitz, 1927 ; Breitsprecher, 1928). However in Lasioderma they consist of 6 lobes or protrusions situat
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 422 N. C. PANT AND G. FRAENKEL. ' \TYvm. FIGURE 2. Transverse section through two lobes of the mycetom of the Stegobium pamccmn larva, showing location of symbionts in the mycetom and lumen of the intestine. OBSERVATIONS AND EXPERIMENTS 1. Mycetoms and symbionts The mycetoms of Lasiodcnna scrricorne are similar to those of Stegobium pani- ccmn which have already been described several times (Karawaiew, 1899; Buchner, 1912; Heitz, 1927 ; Breitsprecher, 1928). However in Lasioderma they consist of 6 lobes or protrusions situated at the junction of fore and midgut which are evagina- tions of the wall of the midgut, and which are in continuation with the lumen of the gut (Fig. 1). As in Sli't/uhiitin, they consist of large cells containing symbionts and irregular shaped nuclei. The other cells of the epithelium are without microorgan- isms and have round nuclei and fringed borders (Fig. 2). In newly hatched larvae the mycetoms are not externally differentiated. It is • iod of 5-7 days that the mycetoms acquire their characteristic lobed shape. (• prcpupae the mycetomes become reduced in size and are no longer prominent. further reduced in the pupae, but are fully developed in the adults, where each outwardly subdivided into three sub-lobes. In Stegobium, which has a tour-1 1 mycetom, the shape of the organ changes markedly in the adult, by the ;x tubular appendages which arise from each 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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