146 



oblongo-cylinclrical, a little swollen laterally at apex, ca. 3 times 

 as long as broad, with thin wall. 



Hub. : On rocks at the depths of 4 fath. Futaye (Amakusa 

 Isl.). 



Dcscrip. : Fronds mostly clepresso-globular, sac-like, attached 

 to the substratum at a basal umbilicated point by hyphoid fila- 

 ments, thin, ca. 0.4 mm. thick. Utriculi short, oblong or sub- 

 cylindrical, a little expanded laterally and rounded at apex, 0.25- 

 0.28 mm. by 0.08-0.1 mm. and the breadth of the top measures 

 0.1-0.14 mm. that is ca. 3 times as long as broad and not thickened 

 at top. They branch near their bases close to each other or 

 at some distances ; they do not form a compact layer but 

 rather loose. Colour light or yellowish green. Substance thin and 

 membranaceous and the plant imperfectly adheres to paper in drying. 



A distinct species among the group of Codia Bursae. As 

 far as it is known to the writer there are two species which has 

 hollow globular frond viz. Codium Bursae (L.) Ag. and C. ovale 

 Zanard., both of which are very different from the present species. 



PL. CXXXV, Fig. 1-5. Fig. 1 : frond of Codium saccatum 

 Okam. n. sp. in nat. state and size. Fig. 2 : cortical utriculi (ca. 

 0.4 mm. thick), ". Fig. 3 : mode of branching of utriculi, " 

 Fig. 4-: utriculus, 0.25x0.1 mm. and at top 0.14 mm. broad. Fig. 

 5: another one, 0.28x0.08 mm. and o. i mm. broad at top. 



Codium saccatum Okam. fffi. 



Jt. < o f> * Wttm- 

 %i cxxxv y JR. 1-5 g. 



& T{ ffi '* 3 * J T^ * * 7 , t\* '&, n ' i\\ 9, iff. & 5-7 cm. * 



