'77 



Acetabularia caraibica Kuetz. 



Nom. Jap, : Tsuno-kasa-nori. 

 PL XCIX, Fig. 1-8. 



Acetabulai ia caraibica Kuetz. Tab. Fhyc. VI, t. 93 ; J. Agardh 

 Till Alg. Syst. VIII, p. 10 ; De Toni Syll. Alg. Vol. I, p. 418.^. 

 cremilata Harv. In Friendly hi. Alg. cxs., n. Si. nee Lamour. 



Fronds minute, tufted 2-3.5 cm - h'3'h- Stipes very slender, 

 thinly incrusted with carbonate of lime, whitish green. Discs 

 campanulate or cup shaped, very concave, 2-5 mm. in diameter, form- 

 ed of strongly-incurved, linear-cuneate utriculi which are emargi- 

 p.ated at apices and strongly gibbose. Utriculi are fewer in 

 number (about 30 or more) and are separated at outer margin by 

 short gaping clefts. Spores are globose and bright green, 

 free from lime. Substance is rigid and in drying the plant does not 

 ntlhere to paper. 



Hab : On shells at shallow place. Nozaki (Noto-jima in 

 Prov. Noto ; col. Mr. Kenzo Kato). Spores : summer. 



PL. XCIX. Fig. 1 : fronds of Acetabu'aria caraibica Kuets. i;i 

 nat. state and size. Fig. 2-3: two fronds detached; fig. 3 has 29 

 utriculi and 3.5 cm long stem; f and ^ respectively. Fig. 4-5: 

 growing apices of young fronds with sterile whirls ; 4 : ^ ; 5 : ^. 

 Fig. 6 : fertile utriculi with spores viewed from the inner side, 

 scarcely 2-3 mm long ; one detached and seen from the lateral side ; 

 -? Fig- 7 : top of stipe having fertile whirls (i.e. utriculi), ^. Fig. 

 8: gibbose top of a utriculus, -*. Fig. 9: root, ^. 



