PAGE 



No. 7. A Discussion of Species Cliaracters in Triposolovia, by 



Charles Atwood Kofoid 117-126 



' The Nature of Species Characters 117-120 



Analytical Table of Characters 119 



The Adaptive Significance of Species Characters discussed 121-124 



Coincident Distribution of Related Species in Triposolenia 124-125 



Bibliography 126 



Nr. 8. On the Significance of the Asymmetry in Triposolenia, by 



Charles Atwood Kofoid. With 2 text figures 127-133 



Xo. 9. Ostracoda of the San Diego Region II. Littoral Forms, 



by Chancey Juday. With Plates 18-20 135-156 



Introduction 135 



Family Cytheridae 135-138 



Family Cypridinidae 138-147 



Family Rwtidermatidae 147-149 



Note on the Hnlocypridae 149 



Bibliography 150 



Explanations of Plates 152-156 



No. 10. Cladocera of the San Diego Region, by Chancey Juday. 



With 1 text figure 157-158 



No. 11. The Marine Fishes of Southern California, by Edwin 

 Chapin Starks anil Earl Leonard Morris. With Plate 

 21 159-251 



Introduction 159-160 



Discussion of Species 161-247 



Bibliography 248-251 



No. 12. Biological Studies on Corymorpha II. The Develo])ment 

 of C. polma from the Egg, by Harry Beal Torrey. 



With 33 text figures 253-298 



Introduction 253-254 



The Medusa, Eggs, and Egg-laying 254-257 



Segmentation of the Egg; the Embryo 257-258 



The Larva 258-264 



Locomotion 259 



Polarity 259-261 



Establishment of Body Regions. Elongation of 



the Stem 261-263 



Development of Tentacles 264-272 



Development of Frustules 272-278 



Metamorphosis 278 



Recession of the Perisarc 279-281 



Development of the Axial Parenchyma 281-291 



Division of the Hydranth Cavity 291 



• The Gonosome 291-292 



Summary and Conclusions - 292-296 



Bibliography 297-298 



