drographic, Plankton, and Dredging Records of the
Scripps Institution for Biological Research of the
University of California, 1901 to 1912, compiled and
arranged under the supervision of W. E. Ritter by Ellis
L. Michael and George F. McEwen. Pp. 1-206, 4 text
figures and map. July, 1915 2.25

2. Continuation of Hydrographic, Plankton, and Dredging
Records of the Scripps Institution for Biological
Research of the University of California (1913-1915),
compiled, and arranged under the supervision of W. E.
Ritter, by Ellis L. Michael, Zoologist and
Administrative Assistant, George F. McEwen, Hydrographer.
Pp. 207-254, 7 figures in text. November, 1916 .50

3. Summary and Interpretation of the Hydrographic
Observations made by the Scripps Institution for
Biological Research of the University of California,
1908 to 1915, by George F. McEwen, Hydrographer.
Pp. 255-356, plates 1-38. December, 1916 1.00

Vol. 16. 1. An Outline of the Morphology and Life History of
_Crithidia leptocoridis_, sp, nov., by Irene McCulloch.
Pp. 1-22, plates 1-4, 1 text figure. September, 1915 .25

2. On _Giardia microti_, sp. nov., from the Meadow Mouse,
by Charles Atwood Kofoid and Elizabeth Bohn Christiansen.
Pp. 23-29, 1 figure in text.

3. On Binary and Multiple Fission in _Giardia muris_
(Grassi), by Charles Atwood Kofoid and Elizabeth Bohn
Christiansen. Pp. 30-54, plates, 5-8, 1 figure in text.
Nos. 2 and 3 in one cover. November, 1915 .30

4. The Cultivation of Tissues from Amphibians, by John C.
Johnson. Pp. 55-62, 2 figures in text. November, 1915 10

5. Notes on the Tintinnoina. 1. On the Provable Origin of
_Dictyocysta tiara_ Haeckel. 2. On _Petalotricha entzi_,
sp. nov., by Charles Atwood Kofoid. Pp. 68-69,
8 figures in text. December, 1915 .05

6. Binary and Multiple Fission in _Hexamitus_, by Olive
Swezy. Pp. 71-88, plates 9-11.

7. On a New Trichomonad Flagellate, _Trichomitus parvus_,
from the Intestine of Amphibians, b