. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. H. LEE AND R. D. CAMPBELL. FIGURE 1. Nematocyst structures of //. attcmiata (left), P. oHgactis (middle), and chimera (right). Nematocyst types, bottom to top, are: stenotele, holotrichous isorhiza, atrichous isorhiza, and desmoneme. All figures except the chimera holotrichous isorhiza represent mature, mounted nematocysts. Chimeras rarely have mounted holotrichous isorhizas, but the species specific tubule pattern is visible in complete but immature capsules in gastric region nests, as shown here. Scale indicates 10 /urn. o
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. H. LEE AND R. D. CAMPBELL. FIGURE 1. Nematocyst structures of //. attcmiata (left), P. oHgactis (middle), and chimera (right). Nematocyst types, bottom to top, are: stenotele, holotrichous isorhiza, atrichous isorhiza, and desmoneme. All figures except the chimera holotrichous isorhiza represent mature, mounted nematocysts. Chimeras rarely have mounted holotrichous isorhizas, but the species specific tubule pattern is visible in complete but immature capsules in gastric region nests, as shown here. Scale indicates 10 /urn. of nematocysts of the chimeras and both parents. These data are taken from animals more than 4 months after chimeras were made. The small sizes of the chimera nematocysts are similar to those of P. oligactis and not H. attcnnata. The morphologies of the chimera nematocysts (Fig. 1) are also unambiguously those of P. oligactis. The absence of transverse coils in the holotrichous isorhiza is the TABLE II Relative proportions of nematocyst types in tentacles. Numbers express percentages of total nemato- cysts. (Between 500 and 1000 nematocysts were counted in the distal parts of tentacles, with the number of polyps indicated at left}. Nematocyst type Stenotele Isorhizas Desmoneme H. attenuata (n = 2) P. oligactis (n = 3) Chimera (n = 6) (±) 34 (±9) 37 (±8) (±) (±) (±) 84 (±4) 60 (±9) 57 (±7). 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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