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CONTENTS 
The Horned Lizards of California and Nevada of the 
Genera Phrynosoma and Anota, by Harold C. Bryant 
With plates 1-9 and 6 figures in text -....-.-..-.-.-.------------ 
On a Lymphoid Structure Lying over the Myelencephalon 
of Lepisosteus, by Asa C. Chandler. With plates 10-12 
and 1 figure in text 
Studies on Early Stages of Development in Rats and 
Mice, No. 3, by E. L. Mark and J. A. Long. The Living 
Eggs of Rats and Mice with a Deseription of Apparatus 
for Obtaining and Observing Them (preliminary paper), 
by J. A. Long. With plates 13-17 and 14 figures in 
SK yp eee eae ease ca ns weesece races oe eceee ce ane e aseeensn soso nesnanawascesce= 
Announcement of the Transfer of the Scripps Institution 
PAGE 
1— 84 
85-104 
105-136 
of Biological Research ........-.----.-------:----c--s-2-0c--seeeneeoe= to face p. 137 
The Marine Biological Station of San Diego, its History, 
Present Conditions, Achievements and Aims, by William 
E. Ritter. With plates 18-24 and 2 maps .- 
Oxygen and Polarity in Tubularia, by Harry Beal Torrey. 
The Occurrence and Vertical Distribution of the Copepoda 
of the San Diego Region with Particular Reference to 
Nineteen Species, by Calvin O. Esterly. With 7 figures 
FHL, THOS Si eseeeeeeeercsceeceeenceaect ee noe ee eee oe nee Be cere eeeae EEE 
Observations on the Suckling Period in the Guinea-Pig, 
by J. Marion Read. With 3 figures in text ..............-...- Z 
Haeckel’s Septhocephalus eucecryphalus (Radiolaria), a 
Marine Ciliate, by Charles Atwood Kofoid —_........-.-...-..-. 
137-248 
249-251 
359-364 
365 
