T"iv. iMi-..f YJSNDO.— NOTES [ON-AJAf&NEW TO JAPAN III. ji,; 



as Plate VI, fig. I, which has also a sharp demarcation between 

 the vegetative and sporangial area.- An exactly similar specimen 

 is to be found in the Botanical Museum of Copenhagen under 

 P. miniata f. amplissima Rosen v., and in the Agardhian Her- 

 barium under P. miniata. We have also the same form on the 

 Kurile coast. This form, however it may have a resemblance 

 in general outline of frond, seems to be treated separately from 

 Gkevill's P. linearis. 



Locality. Otaru Bay (!); Hidaka (!) ; Sado (T. Obara, No. 

 32). 



Distribution. North Atlantic. 



Mychodea membranacea Harv. 



Alg. Tasm. p. 408.— Id. : Alg. Austr. Exsjc. No. 412.— I- Ag. ; 

 Florid. Morph. Tab. XXX, fig. 9.— Id. : Epicris, p. 471.— Id.: Anal. 

 Alg. Coivt. IV, p. 50.— Kutz.: Spec. Alg. p. 723.— Id.: Tab. Phvc. 

 XVI, Taf. 77.-De Toni : Syll. Alg. IV, p. 262 (exel. syn.) 



Comparing our form with a co-type specimen, ours are 

 more cartilaginous in substance and the medullary strands have 

 thicker cell-wall. In other characters both agree in every detail. 



Be Toni (1. c.) doubtingly brings Acanthococcus suhulatus 

 J. Ag. under the present species, and says :— " Si revera syno- 

 nymurn supra allatum huic speciei pertinet, Mychodaea mem- 

 branacea etiam in mari Canadensi adesse videtur." I mention 

 below a species of Mychodea which I identify with the ques- 

 tioned species. 



Locality. Awa Prov. (J. Nikai, No. 1665); Owari Prov. 

 (vS. Narita, No. 3). 



Distribution. Australia. 



Mychodea subulata (Pott) nov. nom. 



-Fucus suhulatus Pott. mscr. in Herb. Mertens. 

 "Sphferccoccus suhulatus Ac: Spec. p. .328.— Id. : System, p. 237, 

 'Gigartina suhulatus Grev. : in Kutz. Spec. p. 750. 



