. Bulletin - United States National Museum. Science. Fig. 101.—Tasis zonaria, aggregated zooid, longitudinal vertical sections of the ganglion, eye, and ciliated funnel. x 97 diameters. from metcalf (1893, c). The gut (fig. 97) is a compact "nucleus," in which, however, the course of the intestine is readily seen without dissection. The large dorsal eye (figs. 101 and 102) is very compact, the typi- cally distal portion being drawn back beneath the true basal portion, mak- ing the whole eye nearly spherical. The thick- walled ends of the rod- colls are somewhat irreg- ular, but the c
. Bulletin - United States National Museum. Science. Fig. 101.—Tasis zonaria, aggregated zooid, longitudinal vertical sections of the ganglion, eye, and ciliated funnel. x 97 diameters. from metcalf (1893, c). The gut (fig. 97) is a compact "nucleus," in which, however, the course of the intestine is readily seen without dissection. The large dorsal eye (figs. 101 and 102) is very compact, the typi- cally distal portion being drawn back beneath the true basal portion, mak- ing the whole eye nearly spherical. The thick- walled ends of the rod- colls are somewhat irreg- ular, but the cells can hardly be called degen- erate. There are no acces- sory eyes in the gan- glion of this species, but on each side of the ganglion there is a huge outgrowth (fig. 103 ey) composed of irregular cells with unevenly thickened walls, like degenerate rod-cells, as for instance, in the accessory eye of the aggregated Salpa fusiformis (fig. 79, p. 92). These outgrowths resemble those of the solitary Iasis. They are sessile upon tho ganglion. They lie above the lateral pouches of the neural gland, in a position cor- responding to that of the largo-celled outgrowths from the ganglion in other species, with which they arc probably Fig. 102.—Tasis zonaria, aggregated form, sagittal section of the eye. x 476 diameters. from metcalf (1893, c).. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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