Table 1. The average number of the testis gonoducts and the ovary gonoducts in each bisexual gonad of ascidians Halocynthia aurantium and Halocynthia roretzi

	Gonad on the right		Gonad on the left
	No. of testis gonoducts	No. of ovary gonoducts	No. of testis gonoducts	No. of ovary gonoducts
H. aurantium (n=40)1)	4.4±0.7	3.5±0.6	3.7±0.7	3.2±0.4
H. roretzi (n=20)2)	8.4±0.7	7.4±1.1	7.4±1.2	6.8±1.4

In case of H, aurantiun, 10 samples were collected in September and October, 2015 and 2016, respectively.
In case of H, roretzi, 10 samples were collected in November and December 2015, respectively.