COLLINS. — THE ALGAE OP JAMAICA. 239 



into the boat, often with great difficulty. Most of the Caulerpas were 

 collected in this way, at places some distance from the shore. Even when 

 the plants grew near land, often the shores were so precipitous that one to 

 reach them must use a boat." 



In the list that follows, the arrangement practically follows that of Die 

 Natiirlichen Pflanzenfarnilien of Engler and Prantl, but the names of 

 orders, families, etc., are not given ; these are shown later in Table I., 

 giving the comparison of the marine flora of Jamaica with the floras of 

 other regions ; the few fresh water algae are included in their appropriate 

 positious in the general list, and the fact of their being fresh water plants 

 is noted by a star prefixed to the name. 



General List. 



Chroococcus turgidus (Kuetz.) Naeg. Among various fresh water 

 algae, forming a scum on a small roadside brook at the base of a cliff, 

 near the baths, Bath, July, 1900, P. & B. P. B.-A., No. 751. Among 

 marine algae, near Kingston, Duerden. 



*Gloeocapsa quaternata (Breb.) Kuetz. Roadside, Bath, July, 1900, 

 P. &B. 



Chroothece Richteriana Hansg. Among other algae, in small quantity, 

 Montego Bay, P. & B. 



Xenococcus Schousboei Thuret. On Spermothamnion Gorgoneum, 

 Kingston, July, 1900, P. & B. 



*Oscillatoria anguina Bory. In still water, Roaring River, near St. 

 Aun's Bay, March, 1893, H. 



O. Corallinae (Kuetz.) Gomont. In a pellicle on coral rock, Port An- 

 tonio, March 27, 1893, II. Among other algae, near Kingston, Duerden. 



*0. formosa Bory. In still water, Roaring River, near St. Ann's 

 Bay, March, 1893; Castleton, April, 1893, II. 



*0. princeps Vauch. In mats in stream, St. Ann's Bay, March, 1893, 

 H; Bath, July, 1900, P. & B. 



*0. princeps forma purpurea n. f. Trichomes and stratum a 

 bright purple, otherwise like type. Forming a stratum on a roadside 

 brook, near the baths, July, 19.00, P. & B. P. B.-A., No. 753. 



*0. proboscidea Gomont. In a pool by " Wag Water," and in stream 

 from reservoir, Castleton, April, 1893, H. 



*0. tenuis Ag. In company with O. princeps forma purpurea, Bath, 

 July, 1900, P. & B. 



*Phormidium Retzii (Ag.) Gomont. In tufts on plants, Rio Cobre, 

 Bog Walk, April, 1893, H. 



