DASYCLADACEAE. 499 



Batophora Oersted! occidentalis (Harv.) M. A. Howe, is usually a 

 smaller plant than the foregoing, with more widely spaced whorls of primary 

 branches. The sporangia, containing large firm-walled aplanospores are lat- 

 eral at the distal ends of the primary or secondary branches. It occurs on old 

 shells, old shoes, pebbles, etc. at Spanish Point, etc. (Phyc. Bor.-Am. 1910 

 and 2016.) 



Neomeris annulata Dickie, is a light green or whitish lime-encrusted, 

 worm-like plant scarcely one inch high, with a cortex that shows under a hand 

 lens numerous small hexagonal facets in regular transverse rows. It grows on 

 stones in shallow water on White 's Island in Hamilton Harbor and in Har- 

 rington Sound, maturing in the month of July. The strongly calcified 

 sporangia cohere laterally and form transverse rings in the lower half of the 

 plant. (Phyc. Bor.-Am. 1909.) 



Acetabulum crenulatum (Lamour.) Kuntze, the dainty Mermaid's Wine 

 Glass, is not uncommon on pebbles, shells, pieces of dead coral, etc. in shallow 

 water, growing especially in rather protected places. Particularly attractive 

 specimens are found, in the grimmer at least, in the tidal stream that forms the 

 outlet of one of the ponds in the Walsingham region. The plants are 1-4 

 inches high and are terminated by a disc or cup - inch broad. Practically 

 the whole plant is usually strongly coated with lime and it becomes a chalky 

 white soon after being taken from the water and exposed to the light, though 

 in the living state the cup part, at least, is commonly a light green. Each of 

 the 35-60 radial chambers of which the cup is composed is in large part a 

 sporangium, containing in the present species 200-500 subglobose firm-walled 

 aplanospores, which are not calcified. (Phyc. Bor.-Am. 1908, as Acetabularia 

 crenulata.) 



Acicularia Schenckii (Mob.) Solms, looks a little like the preceding but 

 is smaller in every way and is less common. The disc or cup is very nearly 

 flat, is only about $ in. broad, and has only 30-42 radial chambers, and the 

 aplanospores are embedded in a coherent mass of lime. It was found late in 

 the month of June, growing on stones in a tidal creek flowing from a man- 

 grove thicket at Hungry Bay. The species was originally described from 

 Brazil and is of occasional occurrence in the West Indies. 



Family BRYOPSIDACEAE. 



Bryopsis hypnoides Lamour., a species with repeatedly compound irregu- 

 lar ramification, almost suggesting an Ectocarpus or certain Cladophoras in the 

 tenuity of its branches and general habit, occurs in shallow water in Hamilton 

 Harbor, Harrington Sound, etc. (Phyc. Bor.-Am. 1870.) 



Bryopsis Harveyana J. Ag., a much coarser plant than the preceding, with 

 the main branches interruptedly pectinate-plumose towards the apices and the 

 ultimate ramuli subsecund and often glomerate-fascicled, occurs in shallow 

 water at Tobacco Bay (Howe 268). 



