177 

 Codium cylindricum Holm. 



Nom. Jap, : Nagamiru. 

 PL. CXLT. 



Codium cylindricnm Holmes New Mar. Alg. from Japan (Linn. 

 Soc. Journ., Dot., Vol. XXXI) p. 250, PI. VII, f. i a, b. 



Fronds elongated, cylindrical, 1-15 m. long, 10-15 mm. thick 

 in the thickest lower portion, distantly dichotomous in the middle 

 and lower portions (often i m. or more parted) gradually becom- 

 ing shorter upward. The branches expand beneath forks into 

 cuneate or broadly triangular segments which become very much 

 broad in lower portions often measuring 12 cm. or more in 

 breadth. The axils are widely patent and round and branches 

 become gradually slender above (2-3 mm. in diameter upward) 

 ending in blunt apices. Utriculi are obovate or oblong rarely 

 cylindrical, 250-900 /* in diam. (usually 400-500 ,u ), about 5-6 

 times as long as broad, rarely 9 times, that is 1.5-2 mm. long ; 

 thin-walled and rounded at top. Gametangia verticillated in 7-8 

 numbers near the apical portion, ovate or elliptico-oblong, 218-310 

 //long, 110-127 p broad. Colour light or yellow green, becoming 

 deeper in drying. The substance is very brittle in fresh state, 

 afterward becoming soft, and very much contracts and somewhat 

 closely adheres to paper in drying. 



Hab. : On rocks at 3-5 fathoms or deeper in calm places. 

 Pref. Kagoshima ; Nagasaki, Nomo and Goto (Prov. Hizen) ; Provs. 

 Hiuga and Tosa ; Ogasawara-Isl. ; Oshima (Prov. Awa) ; Prov?. 

 Sagami and Boshyu. 



PL. CXLI CXLV, June, 1915- 



