semicircularis

	site	site # (info)	collection date	kind	depth	substrate	salin	comments	reference
A	Hopkins Marine Laboratory, Pacific Grove, California, USA	1542 map	Sep 13, 1960	type locality		shell gravel, stones		tidepools close to the laboratory, washed out from shell gravel, stones and seaweed.	Karling TG (1966): 522
B	Dillon Beach, Bodega Bay, California, USA	3710 map	Aug 22, 1960					tidepools.	Karling TG (1966): 522