Figure 3. Longitudinal section of the nerve cord. ×75.
Figures 4 to 6. Drawings of sections taken through the brain at various levels, only one-half is shown in each case. ×75.
[Littoral Ascidians Collected at Laguna Beach]
The specimens reported upon are from a collection made by P. A. Lichti during the summer of 1915, and from a small collection brought in during the summer of 1916. The determinations of all but the fifth were kindly made by Prof. W. E. Ritter.