-2- 



To ay wife, for her many cheerful sacrifices and her will 

 ing help in numerous ways, is due my fullest gratitude* 



The following starfish were studied intensively: 

 Pi ea, star oohraoaus (Brandt) 



(Stimpsonj 



Asterina miniata (Brandt) 



Supplementary observations ware made on the following 

 eohinoderms: 



I^ptasterias eaualia (Stimpson) 

 Pisaster bravigpinua (Stiiapson) 

 Bvagterias troachelii (Stirapson) 

 Stromgrooentrotua franoiaoamua (Agassis ) 

 Professor 9* K* Fisher writes me as follows "Jennings 

 (1917) worked on Asterias aertulifera Xantus* I hav the actual 

 specimen sent, for identification to the Museum of Comparative 

 Zoology. Verrill calls the sane species Qrthasteriae gonalena." 

 Jennings uses the name Astarias forreri De Loriol* 



So far as X am aware, the above seven species are the only 

 Pacific coast starfish, whose physiology has been described. 



BUL.-w-_*-*y T .-.T-^g??g 5*. ^ *V -JMHLO. J* 



PWMM 



Piaster ooraoeus, was collected from the wharves in 

 Oakland harbor for study in the zoological laboratory of the Univer- 

 sity of California. Jor study in the laboratory of the Hopkins 

 Marine Station they were obtained from the surf beaten rooks in 

 front of the building. 



A remarkable difference was evident in the physiology 



