THE BOTANICAL MAGAZINE. 



Vol. X, No. 111. 



PA RT II 



Contribution to Knowledge of the Marine 

 Algae of Japan. XL 



(Continued from No. 110) 



By 



K. Okamura, Eigahihalmshi. 



With PI. III. 



Dasya pulchra sp. nov. 



Diagnosis. Fronds filiform, 2-3 times disticho-piunate, alternate, 

 ecorticated, 4-siphonous, compressed. Primary pinnae patent and linear 

 in outline, being pinnated with secondary ones. Secondary pinnae 

 arising from every 3rd or 4th node, diehotomous or subpinnate in 

 larger ones. Pinnnlae subulate monosiphonous, or a few basal cells 

 polysiphonous. Stichidia linear-lanceolate, apiculate with a polysiph- 

 onous pedicel. Articulations subequal to or little longer as the 

 diameter. 



Hob, On Gladophora Wrightii Harv. and other algae in sublitoral 

 zone. 



Loc. This plant has been known from Iwaki, Sagami and Oshiina 

 (Idzu). A fully grown plant bearing stichidia was collected and sent 

 to me by Mr. Shirai who collected it at Oshima in May, 1887. At 

 present this plant is not known to grow in the Japan sea. 



Description. Frond epiphytic, 3-6 cm high, 200-300 y. thick, 

 not much attenuated above, articulated throughout, 4-siphonous, com- 

 pressed, 3-4 times pinnate in a full-grown plant r throughly alternate and 

 distichous, with more or less percurrent stem, branching into some main 



