78 TRANSACTIONS OF THE [Sess. lxxvi. 



EXPLANATION OF ILLUSTRATION. 



a. Twig in fruit, natural size, received from Mr. S. R. Webb. 



b. Flower cut open, received from Dr. Schinz as No. 5240 

 Schlechter. 



c. Calyx separated, showing position of double row of immersed oil 

 glands. 



d. Showing disc and hair-tipped carpels, and glabrous style. 



e. Petal. 



/. Fertile stamen. 



g. Staminode. 



h. Fruit. 



i. Seed. 



The figures b to h are magnified. 



A New Japanese Grateloupia. By E. M. Holmes, 

 F.L.S. (Plate III.) 



Amongst some marine algae collected in Japan by Mr. 

 S. Okubo, and brought to me for identification, I noticed 

 one which I was unable to match either at the Kew 

 Herbarium or at South Kensington. Although bearing 

 some resemblance to Grateloupia filicina, it differs so 

 much in habit and colour that I have decided to describe 

 it as a new species. 



Grateloupia subpectinata, n. sp. — Fronde compressa, 

 plana, ad 15 cm. longa, et 3 mm. lata, pinnatim ramosa, 

 ramis a basi angustiore, longe subuliformibus, inferioribus 

 longioribus, infra medium latere inferiori ramellis brevibus 

 subpectinatis, latere superiori dentibus paucis prseditis, ramis 

 supremis simplicibus, brevibus. Color pulchre roseus. 



Hab.: Japan, S. Okubo, 1912. 



The nearest approach to this species, in the mode of 

 branching, is Grateloupia Pennatula, Kuetzing, a native of 

 Cuba (" Tab. Phyc," vol. xvii., tab. 27, a, b,), which has 

 similar ramelli, but both the ramuli and ramelli are lanceo- 

 late-linear rather than subuliform, and are much shorter 

 in proportion. The rose colour, so far as I know, is never 

 found in forms of Grateloupia filicina, although I have 

 seen many forms referred to this species. The structure 

 is, however, typical of Grateloupia, and not of loose texture 

 as in the section Gloiogenia, to which a rose-coloured species, 

 G. acuminata, from Japan, previously described by me, 

 belongs. 



