CATALOGUE OF PLANTS. 233 



GELIDIACE^S. 



CHOREOCOLAX, Reinsch. 

 C. Polysiphoniae, Keinsch. 



This species forms whitish spherical lumps not larger than a 

 pin's head, on the fronds of Polysiphonia, especially at the fork- 

 ings of the branches. The fronds consist of closely packed, 

 radiating filaments, near the ends of which are formed, in separate 

 individuals, the antheridia, the cystocarps, and the tetraspores. 

 The last, which are cruciately divided, are the commonest form 

 of fruit. Occasional. Seal Harbor, and elsewhere (Collins). 



HELMINTHOCLADIACE^E. 



NEMALION, Duby. 

 N. multifidum, Ag. 

 Sea Wall (Holden). 



CHANTRANSIA, Fries. (Trentepohlia, Farlow's Manual, 108.) 



C. virgatula (Harv.), Thuret. T. virgatula, Farlow's Manual, 



109. 



On Alaria, etc. Near Seal Harbor (Collins) ; Sea Wall 

 (Holden). 



C. Daviesii (Engl. Bot.), Thuret. T. Daviesii, Farlow's Man- 

 ual, 109. 



On Rhodymenia, Bracy Cove (Collins). 

 *C. Hermann! (Roth), Kuetz. 



On Tuomeya (Holden). 



BATRACHOSPERMUM, Roth. 

 B. vagum, Ag. 



Denning Brook (Holden) ; Deer Brook, Jordan Pond ; 

 Sunken Heath Brook (Rand). 



