. The Biological bulletin. Biology; Zoology; Marine biology. 592 DAVID McK. RIOCH the later experiments. The rectal temperature of the animals was kept between 37° and 40° C. by pouring cold sea water over them occasionally. Stimulation was bipolar by means of a pair of silver-silver chloride electrodes with an interpolar distance of 2 mm. Current was supplied by the 60 cycle line through a potentiometer. The effective voltage varied in different animals from | to 5 volts. For single. Fig. 1. Outline drawing of a lateral view of the brain of seal 5. X The position of the electrically
. The Biological bulletin. Biology; Zoology; Marine biology. 592 DAVID McK. RIOCH the later experiments. The rectal temperature of the animals was kept between 37° and 40° C. by pouring cold sea water over them occasionally. Stimulation was bipolar by means of a pair of silver-silver chloride electrodes with an interpolar distance of 2 mm. Current was supplied by the 60 cycle line through a potentiometer. The effective voltage varied in different animals from | to 5 volts. For single. Fig. 1. Outline drawing of a lateral view of the brain of seal 5. X The position of the electrically excitable cortex is indicated by the shaded area. an, S. ansatus. co, S. coronalis. cr, S. cruciatus. e lat, S. endolateralis. lat, S. lateralis, lat p, S. lateralis posterior, olf, Bulbus olfactorius. p cr, S. post- cruciatus. pr cr, S. precruciatus. pr s, S. presylvius. pro, S. proreus. rhi, Fissura rhinalis. s, S. pseudosylvius. ssa, ssp, sss, S. suprasylvius anterior, posterior and superior. shocks a Harvard inductorium, with 3 volts in the primary circuit and the secondary coil set at 7 to 9 cm., was employed. Between observations the cortex was kept moist by application of cotton pledgets wet with warm Ringer's solution. At the end of the experiment the brains were removed and pre- served in formalin. Serial sections in the sagittal plane were cut at 35 jLt of the frontal poles of the left hemispheres of seals 3 and 4, and. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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