. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 310 J. L. RAM ET AL For L. sttigncilis, the dissected preparations usually in- cluded cerebral, pedal, parietal, and buccal ganglia: cuts were made in the pedal commissure to produce an opened, flat ring of ganglia prior to Fixation. For B. canaliculatum (Pierce, 1950; Bullock, 1965). cuts were made either be- tween left pleural and left parietal (subesophageal) gan- glia, or between cerebral ganglia prior to pinning out for dissection. The latter orientation is shown schematically in the Results to indicate the location of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 310 J. L. RAM ET AL For L. sttigncilis, the dissected preparations usually in- cluded cerebral, pedal, parietal, and buccal ganglia: cuts were made in the pedal commissure to produce an opened, flat ring of ganglia prior to Fixation. For B. canaliculatum (Pierce, 1950; Bullock, 1965). cuts were made either be- tween left pleural and left parietal (subesophageal) gan- glia, or between cerebral ganglia prior to pinning out for dissection. The latter orientation is shown schematically in the Results to indicate the location of immunoreactive neurons. The nervous system of C. ccmcholepas. like that of B. canaliculatum, consists of several rings of ganglia closely surrounding the esophagus (Fig. 1); thus, the dis- section of the nervous system of C. concholepax was similar to that of B. canaliculatum. As a more primitive prosobranch, T. utm has a less compact set of ganglia than the other species. The nervous system of T. citni is almost identical to that of Trochus illustrated in Hyman (1967), which was used as a dissection guide. The anteri- orly located pair of cerebral ganglia are connected by cerebral-pedal connectives to the pedal ganglia, which were easily identified by their location, shape, and the presence of statocysts. Most preparations included cere- bral and pedal ganglia, the cerebral commissure, and the cerebral-pedal connectives, but in some preparations, other ganglia attached to these were also retained. After dissecting and pinning out preparations in saline supvc. rtn Figure 1. Diagram of the central nervous system of Conchulepus concholepas, redrawn from original artwork by Huaquin (1966). Abbre- viations: aa, anterior aorta: es. esophagus; leg, left cerebral ganglion; Ipg, left pedal ganglion; Iplg, left pleural ganglion; Itn. left tentacle nerve; rbg. right buccal ganglion; rcg. right cerebral ganglion; rpg, right pedal ganglion; rplg. right pleural ganglion; rtn, right tentacle
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
