58 A CATALOGUE OF THE BRITISH MARINE ALG 
Gen. 153. Acrocumrium Nag. (= Cuanrransia Schm., non Fries). 
for Chantransia as that genus was understood by Thuret (i. ¢. to 
include both fresh-water forms, like C. chalybea and C. Herman, 
and marine, like C. corymbifera, C. efflorescens, and C. microscopica), 
or, as seems preferable, to preserve the former name as that of a 
oubt fresh-water alge, and to adopt Niigeli’s genus 
Acrochatium for the reception of the well-understood marine forms. 
a. Parasitic species. 
A, entophyticum Batt. (= Chantransia entophytica Batt.). Coast 
th : 
of Devon (Plymouth). Very rare. Parasitic in the thallus of 
mosa, 
A, Chylocladie Batt. (= Colaconema Chylocladia Batt.). Coast 
of Devon (Plymouth, Torquay). Very rare. Parasitic in the thallus 
of Chylocladia ovalis.—f. pulchra Batt. Coast of Bute (Isle of Cum- 
brae). Parasitic in Sertularia. 
A, endozoicum Batt. (= Chantransia endozoica Darbyshire). Coast 
of Northumberland (Alnmouth) and 8.W. coast of Ireland (Valentia, 
Co. Kerry). Parasitic in species of Alcyonidium. Very rare. 
 -B. Epiphytic species. 
A, trifilum Batt. (= Chantransia trifila Buffham). Coasts of 
Devon (Plymouth) and Dorset (Swanage). Very rare. 
A. microscopicum Nig. Coasts of Cornwall (Kynance Cove) ; 
Devon (Torquay) ; Northumberland (Berwick). Very rare. 
. sparsum Batt. (= Callithamnion sparsum Carm.). Coasts of 
Cornwall (Mount’s Bay); Sussex (Brighton); Durham (Roker). 
Scotland: Haddington (Dunbar); Fife (Earlsferry) ; Kincardine 
(Bay of Nigg); Orkney Islands (Kirkwall); Argyle (Appin). Ire- 
land: Miltown Malbay, Co. Clare. : 
mirabile Nag. (= Callithamnion mirabile Kiitz.). Coast of 
Dorset (Swanage). Rare. 
. caspitosum Nag. (= Callithamnion caspitosum J. Ag.). Coast 
of Dorset (Swanage). ( obaaat ate 8+) 
