. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 46 T. L. JAHN AND F. CRESCITELLI ture and not greatly unlike that obtained from the grasshopper eye. The same type of response was elicited from the eye during the morning and early afternoon hours (Records 2-5). At 3:57 (Record 6) a distinctly different type of electrogram was obtained. The wave form of this record is polyphasic, consisting of an initial series of relatively 32 33 34 -r'T 5-5 3PM 4:51 f 5'-\7 PM PM . 6:44 PM. 8:41 I AM FIG. 2. Electrical responses from the eyes of certain beetles at different hours dur
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 46 T. L. JAHN AND F. CRESCITELLI ture and not greatly unlike that obtained from the grasshopper eye. The same type of response was elicited from the eye during the morning and early afternoon hours (Records 2-5). At 3:57 (Record 6) a distinctly different type of electrogram was obtained. The wave form of this record is polyphasic, consisting of an initial series of relatively 32 33 34 -r'T 5-5 3PM 4:51 f 5'-\7 PM PM . 6:44 PM. 8:41 I AM FIG. 2. Electrical responses from the eyes of certain beetles at different hours during the day and evening. All responses are to brief exposures of a bright (725 ) light. The records shown are typical responses selected from many which comprised each series. All records of Figs. 2 and 3 were taken with the recording paper moving at the same speed. Distances between dots of the time record, when shown, indicate 142 sigma. The records for each animal were taken with the same amplifier gain except when indicated as X. These and the following records have been retouched to facilitate reproduction. Refer to text for further details. rapid waves and a long slow phase (c-wave). From 3:57 to 11:02 (Records 6-11) this complex wave form persisted, and the slow wave increased in magnitude. On the morning of the third day of the experiment (Record 12) a brief exposure of the eye to light again elicited the relatively simple type of electrogram. This persisted with slight modifications until 5:11 (Records 13-19). At 6:33 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 Clar
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