54 COLLINS AXD HEHVEY. 



Island, April, Collins; Pink Bay, Spanish Point, March, Hervey. 

 In habit much like Batophora Oerstedi var. ocddentalis, but growing in 

 more sheltered places. 



Batophora J. G. Agardh. 



B. Oeestedi J. G. Agardh. 1854, p. 108; CoUins, 1909, p. 383, 

 fig. 145; Borgesen, 1913, p. 73, fig. 58; P. B.-A., No. 1910. Fairy- 

 land, July, with ripe aplanospores, CoUins. 



Var. occiDEXTALis (Harv.) Howe, 1905a, p. 579; CoUins, 1909, 

 p. 384; P. B.-A., Xo. 2016; Dasycladus ocddentalis Harvey, 1858, 

 p. 38, PI. XLI. B. Rein; Spanish Point, June, Howe; SheUy Bay. 

 Dec, Hervey. A condensed form, growing in more exposed locaUties. 



Family CODIACEAE. 



CoDiuM Stackhouse. 



1. Prostrate. 1. C. intertextum. 



1. Erect. 2. 



2. AU divisions contraeted at base, enlarging upwards. 



4. C. isthmocladum. 

 2. No distinct contractions at base of divisions. 3. 



3. Peripheral utricles 100-150 im diam., exceptionally 200 ;i. 



2. C. tomentosiun. 

 3. Peripheral utricles rarely under 300 ii. 3. C. decorticatum. 



1. C. intertextum sp. nov.; P. B.-A., 2018. Fronde prostrata, 

 tereti vel complanata, saxo arete adhaerente, apicibus autem ^nilgo 

 liberis; ramis brevibus, irregularibus, stratum subcontinuiun for- 

 mantibus, strato interiore siphonum dense imphcatorum strato 

 corticali cincto, utriculorum longorum, cylindricorum vel subclava- 

 torum, apicibus tnmcatis, subrotimdatisve, diam. 70-90 /i; colore 

 atro'VTridi; substantia subfirma, nee maxime gelatinosa. 



Frond prostrate, subterete or flattened, closely adherent to the rock, 

 but with tips usuaUy free; with short, irregular branches, forming an 

 almost continuous coating. Interior layer of densely packed, slender 

 tubes, surrounded by a cortical layer of long, cylindrical or somewhat 

 clavate utricles, with truncate or somewhat rounded ends, 70-90 n 

 diam. Color dark green, substance rather firm, not speciaUy gelati- 

 nous. Forming a continuous belt a few dm. wide on upright or 



