r, 1917 .20

4. New Species of _Amphinomidae_ from the Pacific Coast,
by Christine Essenberg. Pp. 61-74, plates 4-5.
October, 1917 .15

5. _Crithidia euryophthalmi_, sp. nov., from the Hemipteran
Bug, _Euryophthalmus convivus_ Stal, by Irene McCulloch.
Pp. 75-88, 35 text figures. December, 1917 .15

6. On the Orientation of _Erythropsis_, by Charles Atwood
Kofoid and Olive Swezy. Pp. 89-102, 12 figures in test.
December, 1917 \ .15

7. The Transmission of Nervous Impulses in Relation to
Locomotion in the Earthworm, by John T. Bovard.
Pp. 103-134, 14 figures in text. January, 1918 .35

8. The Function of the Giant Fibers in Earthworms, by John
F. Bovard. Pp. 135-144, 1 figure in text.
January, 1918 .10

9. A Rapid Method for the Detection of Protozoan Cysts in
Mammalian Faeces, by William C. Boeck. Pp. 145-149.
December, 1917 .05

10. The Musculature of _Heptanchus maculatus_, by Pirie
Davidson Pp. 151-170, 12 figures in text.
March, 1918 .25

11. The Factors Controlling the Distribution of the
Polynoidae of the Pacific Coast of North America,
by Christine Essenberg. Pp. 171-238, plates 6-8,
2 figures in text. March, 1918 .75

12. Differentials in Behavior of the Two Generations of
_Salpa democratica_ Relative to the Temperature of the
Sea, by Ellis L. Michael. Pp. 239-298, plates 9-11,
1 figure in text. March, 1918 .65

13. A Quantitative Analysis of the Molluscan Fauna of San
Francisco Bay, by E. L. Packard. Pp. 299-336,
plates 12-13, 6 figs, in text. April, 1918 .40

Transcriber's Notes

Emphasis Notation:

_text_ - italicized

=text= - bold

All of the text presented here is a copy of the original article's
text with the following exceptions:<

1. Typographical Corrections

A. Page 509 - M