NEW MARINE ALG^E. 



351 



were apparently not more than i in. in height, and were growing 

 on Hypnea Ecklonii. In my specimens the lower part of the plant 

 consists of an intricate apparently decumbent mass of ramuli, of 

 which the articulations are nearly cylindrical ; these are followed 

 by a few elliptical articulations, the upper ones becoming pyriform 

 and then obovate. The plant was sent to me by Dr. Becker under 

 the name of Lomentaria corallina Kiitz. {Tab. Phi/c. xii. t. 9G, p. Si). 

 It does not appear to have been collected by anyone since it was 

 first found by Suhr, until rediscovered by Dr. Becker. On one of 

 Dr. Becker's specimens I found zonate tetraspores, which indicated 

 that it probably belonged to Krxjthrocloninm or Rhabdonia, but could 

 not belong to Cfnjiocladid, Champia, or Ccdodonium, since these have 

 tripartite tetraspores. The axile siphon and the lax tissue of 

 branching threads in the articulation show that it must be referred 

 to Erythroclonium rather than to the Opnntiopsis section of Rhab- 

 donia. From Areschouiiia it differs entirely in habit, its more lax 

 structure, and more slender axile siphon. Although the cystocarps 

 have not been described,* Miss Barton tells me that she found one on 

 a specimen in the British Museum Herbarium, and that it presented, 

 so far as she was able to judge with a lens, the characteristic ap- 

 pearance of those of Erythrodoniinn. I have therefore no hesitation 

 in placing the plant in that genus. 



It is interesting to note that two out of the three species here 

 described belong to Australian genera, and thus increase the number 

 of genera common to Australia and S. Africa. Dr. Becker is to be 

 greatly congratulated on the large number of interesting new species 

 that he has already discovered in Natal. 



4. Grateloupia Wattii, n. sp. Amongst a series of specimens 

 sent to me from India for identification by Dr. George Watt, CLE., 

 I found a specimen of a Grateloupia which difiers from any of the 

 known species, although most nearly allied to G. CutleiicB. I have 

 therefore taken this opportunity of publishing a description of it as 

 follows : — 



G. Wattii, n. sp., radice scutata, fronde palmatim divisa, lobis 

 imbricatis lanceolatis oblongis, basi parum attenuatis, apice obtusi- 

 usculis, margine undulato, crenulato-dentato. Cystocarpiis per 

 totam frondem densis. 



Hab. Verawal, Kathiawar, India, Ih: G. Watt, February, 1894. 



This species differs from G. CtitlericB in the remarkably palmate 

 character of the fronds, the segments of which overlap so much at 

 the base that it is not possible to lay them out in one plane ; in the 

 base of the segments being scarcely attenuated, and in the absence 

 of proliferations from the surface of the frond. The colour of the 

 plant has evidently been destroyed by exposure, as it has only a 

 dull pale brownish colour like that of Pimctaria latifoHa. It adheres 

 closely to paper. The stipe above the scutate base does not exceed 

 y\ in. in height, and the very few proliferations present are very 

 small, linear lanceolate, and obtuse. 



* It is not certain, from the description given by Suhr, whether the fruit 

 figured really consists of cystocarps or of a Dermocarpa or other parasitic alga. 



