Laing. — Revised List of New Zealand Seatveeds. 381 



The disappearance of shells from beaches is often to a con- 

 siderable extent due to the action of these alg?e. The shells 

 from which this species was obtained were picked up out of the 

 mud at Diamond Harbour, Lyttelton. Reinbold states that 

 they also contained a plant closely resembling Gomontia poly- 

 rhiza, but, as the material was sterile, this determination is not 

 certain. 



Order Cladophoraceae. 



391. Cladophora simpliciuscula, Kg., Phyc. Gener., p. 262 (= C. 



subsimplex, Kg., Tab. Phyc). 

 St. Clair : R. M. L. 



392. Rhizoclonium africanum, Kg. (? R. ambiguum, Hook.). 

 Mouth of Kaikorai Stream, Otago : R. M. L. 



Order Ulvaceae. 



393. Enteromorpha flexuosa, J. Ag. (Small form.) 

 Mouth of Waimakariri : R. M. L. 



394. Enteromorpha torta, Rbd. (= E. percussa, Harv., partim). 

 Mouth of Kaikorai Stream, Otago : R. M. L. 



Subclass PHiEOPHYCE^E. 

 Order Dictyotaceae. 



395. Dictyota dichotoma, Lmrx., var. implexa. 

 Stewart Island : R. M. L. 



Subclass FLORIDEiE. 

 Order Ceramiaceae. 



396. Antithamnion ternifolium, Hook, and Harv., Lond. Journ., 



iv., p. 272. 



North Mole, Timaru : R. M. L. 



Of my specimens Major Reinbold says, " More robust and more 

 richly ramified than the type" (Flor. Antarct., pi. 189, fig. 2). 

 If the plant does not belong to this species, it is at least very 

 near to it. 



397. Ptilothamnion schmitzii, Heydrich, Berichte der deutschen 



botanischen Gesellschaft, vol. xi., 1893. 

 Bay of Islands : Heydrich. 



398. Sport goclonium pastorale, R. M. L., Trans. N.Z. Inst., 1904. 

 Wyclifie Bay, Otago Peninsula : R. M. L. 



399. Ceramium discorticatum, Heydrich, loc. cit. 

 Bay of Islands : Heydrich. 



400. Ceramium laingii, Rbd. MS. (sp. nov.). 



On Codium mucronatum, Riverton : R. M. L. 

 The following is Reinbold's description of the species : 

 " Minutum (5-10 mm. altum) sed admodum crassum, continue 



