564 Dr. W. H. Harvey's Account of the Marine Botany of 



316. Cjvuleepa ^cneHa, n. sp. ; surculo setaceo glabro ; frondibus filiformibus siniplicibus v. parce 



ramosis, ramis vagis, foliis spiraliter laxe insertis subtristichis erecto-patentibus subulatis 

 brevibus mucronatis lasteviridibus. On the Natural Jetty at Kottnest, very rare (215). A 

 slender species, 1-2 inches high. 



317. Cadleepa hypnoides, R. Br. Abundant in tide-pools and borders of reefs, at Rottnest and 



Garden Island (185). 



318. Caulerpa MuUeri, Sond. I surculo crasso squamulis cylindraceis dichotorais dense muricato; 



fronde erecta stipitata oblonga obtusa pinna ta; stipite pinnisque foliolis undique densissime 

 obtectis, foliolis geminis basi unitis cylindraceis obtusis apice bi-mucronulatis erectis im- 

 bricatis intense viridibus. On border reefs and sides of deep tide-pools at Rottnest (205). 

 Nearly related to C. hypnoides, but a much stronger and coarser plant, readily known at a 

 glance, when the two are seen together, though difficult to characterize. In C hypnoides 

 the surculus and base of stem are clothed with far more densely set and muricated squamse, 

 and the folioli are much smaller, softer, more patent, more laxly set, and more acute. 



319. Caulep-pa ohsciii-a, Sond.! Abundant at King George's Sound; and in tide-pools, &c., Rott- 



nest (77). The fronds are often 12-18 inches long. 



320. CAULERPA/Hra'/bA'n, Hook, and Harv. A few fragments cast ashore at King George's Sound, 



February ( ). 



321. CAVhERtA geminata, n. sp. ; surculo glabro; frondibus erectis siniplicibus (brevibus) articu- 



lato-constrictis glabris, foliis parvis oppositis ovoideis distichis v. tortione caulis quoquo- 

 versum directis. On very shady rocks, usually on the under surface of table-reefs, Rottnest. 

 The distichous form is readily distinguishable; but that with leaves turned to all sides 

 resembles C. sedoides in miniature; but is readily known by its articulate stem and opposite 

 leaves (214). I suspect that it is S. sedoides, of Sonder in Pi. Preiss. 



322. Caulerpa corynephora, Mont. King George's Sound, and in deep tide-pools, Rottnest (101). 



323. Caulehpa scalpelliformis, R. Br. King George's Sound, and on border reefs, Rottnest (206). 



324. Stp.uvea plumosa, Sond. Abundant on all the shallow reefs at Rottnest, but scarcely in 



season in June, when I visited the island (216). 



325. Struvea macrophylla, n. sp. ; fronde oblongo-ovali maxima (4-5 uncias longa, 3 uncias lata) 



crenata, lubulis anastomosantibus pluries pinnatis. Champion Bay, Mrs. Snimmond, Jun. 

 A single specimen, bleached white, was sent by Mrs. Drvminond to Mr. Sanford, wjjo kindly 

 presented it to me. The frond closely resembles a beautiful structure of '" old point-lace," 

 and as it is very tough and strong, it might be manufactured into ladies' natnral-lace collars, 

 by merely tacking on a border of net. 



326. Poltphtsa Ptvicidus, Ag. Fticns Peniculiis, R. Br. Extremely abundant, at all seasons, in 



Princess Royal Harbour, King George's Sound, growing on old shells. Not seen else- 

 where (1). 



327. VEmciLLVS Arbziscula, Mont.? Abundant, on shallow, sand-covered reefs at Rottnest (204). 



It varies much in size. The stem is sometimes scarcely twice as thick as a hog's bristle; 

 sometimes as thick as a goose-quill. I have not compared with Montague's plant. 



328. Halimeda macroloba, Dne. Cape Riche and Rottnest, on the reefs (226). 



329. CoDiUM tomentosum, Ag. Abundant everywhere (45). 



