260 
BULLETIN OF THE BUREAU OF FISHERIES 
represent the effect of OH ions. Similarly plotted, the results for KOH fall into a 
single curve making an angle of less than 45°. If this interpretation is correct, the 
concentration of OH ions is directly proportional to the effect, but for the effect of 
ions of Na and K a factor must be introduced, as in the case of the salts, for this 
relationship to hold. 
(5) The response of the adductor muscle to stimulation of the tentacles bears a 
relationship to concentration similar to that of the tentacular reaction, but the re- 
action time is longer. 
(6) When mixtures of cumarin and quinine are employed the latent period of the 
reaction observed is the same as that of the substance which, alone, would produce 
reaction after the shorter latent period. The two substances act independently, 
one neither enhancing nor inhibiting the effect of the other. 
(7) Mixtures of two salts, such as NaCl and KC1 or NaCl and MgCl 2 , are additive 
in effect and presumably act on the same endings in the same manner. 
BIBLIOGRAPHY 
Agersborg, H. P. Kjerschow. 
1922. Some observations on qualitative chemical and physical stimulation in Nudibranchiate 
mollusks with special reference to the role of the “rhinopores.” Journal of Experi- 
mental Zoology, vol. 36, No. 4, November, 1922, pp. 423-444, 1 fig. Philadelphia. 
Arey, Leslie B., and W. J. Crozier. 
1919. The sensory response of Chiton. Journal of Experimental Zoology, vol. 29, No. 2, Oc- 
tober, 1919, pp. 157-260, 14 figs. Philadelphia. 
Copeland, Manton. 
1923. The chemical sense of Palxmonetes vulgaris. Anatomical Record, vol. 24, 1923, pp. 
394-407. 
Copeland, Manton, and H. L. Wieman. 
1924. The chemical sense and feeding behavior of Nereis virens. Biological Bulletin of the 
Marine Biological Laboratory, Vol. XLVII, pp. 231-238, 1 fig. Woods Hole, Mass. 
Crozier, W. J. 
1915. The sensory reactions of Hololhuria surinamensis Ludwig. Zoologischer Jahrbucher, Ab- 
teilung fur Allgemeine Zoologie und Physiologie der tiere, Bd. XXXV, Nr. 3, 1915, 
pp. 233-297. Jena. 
1916. Regarding the existence of a “common chemical sense” in vertebrates. Journal of 
Comparative Neurology, vol. 26, 1916, pp. 1-8. 
1918. On sensory activation by alkalis. American Journal of Physiology, vol. 45, 1918, pp. 
315-322. Boston. 
1918a. Sensory activation by acids. American Journal of Physiology, vol. 45, 1918, pp. 323- 
341. Boston. 
Crozier, W. J., and Leslie B. Arey. 
1919. Sensory reactions of Chromodoris zebra. Journal of Experimental Zoology, vol. 29, No. 
2, October, 1919, pp. 261-310, 8 figs. Philadelphia. 
Hecht, Selig. 
1918. The physiology of Ascidia atra Lesueur. II. Sensory physiology. Journal of Experi- 
mental Zoology, vol. 25, No. 1, February, 1918, pp. 261-299, 2 figs. Philadelphia. 
Hopkins, A. E. 
1932. Chemical stimulation by salts in the oyster, Ostrea virginica. Journal of Experimental 
Zoology. In press. 
Irwin, M. 
1918. The nature of sensory stimulation by salts. American Journal of Physiology, vol. 47, 
1918, pp. 265-277. Boston. 
Kribs, H. G. 
1910. The reactions of Aelosoma to chemical stimuli. Journal of Experimental Zoology, Vol. 
VIII, No. 1, January, 1910, pp. 43-74, 2 figs. Philadelphia. 
