Marine Algce of Bemvick-on-Tweed. 317 



doubt whether Hcematophlma Crouanii and Hildenbrandtia rosea 

 are really generically distinct, but in a letter to me, referring to 

 Berwick specimens of the two plants which I had sent him, he 

 says: — "Thank you very sincerely for the specimens, and for 

 the means you put in my hands of comparing a true Bcematophlcea 

 Crouanii with the Hildenbrandtia rosea. Certainly they are very 

 distinct, and no doubt they are to be referred to different Genera. 

 From the few remarks in the Epicrisis, you \\ ill find, I think, 

 that I supposed different species confounded, but in want of good 

 and rightly named specimens, it was not, at the time, in my 

 power to make out their differences and to put each in its right 

 place." 



Family— H ildenbrandtiaceae. 



HILDENBEANDTIA, Nardo. 



Hildenbrandtia rosea, Ktz. 

 Spec. Alg., p. 694. 

 Descr. Hildenbrandtia rosea, J. Ay., Spec. Alg. II., p. 495. 

 Fig. „ „ Ktz., Tab. Pliyc. vol. xix., t. 91. 



Exsicc. „ ,, Crouun, Alg. Finist., no. 235. 



Syn. „ ,, J. A</., Epicr.. p. 379. (excl. Syn. Huama- 



tophleea Crouanii, Cm.) 

 Hildenbrandtia rubra, Harv., Phyc. Brit., p. 250. 

 Sab. On rocks and stones in shallow, pools between tide-marks. Fruit 

 Oct. — April. Common. Berwick Bay, Spittal, Scremerston, 

 and elsewhere along the coast. 



delineata est. In nostra tamen sphaerosporas non sessiles, seel in hlo 

 breviole, articulato pedicellatas observavi." 



And again Epicrisis, p. 380. " Icones a Harvey et Crouan datas com- 

 paranti insignis adpareat fructus differentia. In planta Crouanii 

 nemathecia superficialia videntur et sphaarosporse fere quales in Hasmatoceli 

 obveniunt dispositas. In planta Harveyana in cryptis excavatis supra 

 fundum basalem proveniunt spha?rospora3. Si fidge observationes, certum 

 mihi videtur plantas esse diversas et forsan diversorum generum. Planta 

 Crouani structura frondis a Hajmatoceli, spaerosporis zonatim divisis a 

 Peyssonnelia diffcrre videtur." 



