618 CHAEACEAE. 



2. Chara foliolosa Muhl.; Willd. Mem. Acad. Roy. Berlin 1803: 86. pi. 1. f. 2. 



1805. 



Chara polyphylla Muhleiibergii A. Br. Boston Jour. Nat. Hist. 5: 264. 



1845. 



Chara Wikstromii Wallm. K. Vet.-Akad. Handl. 1852: 297. 1854. 

 Chara gymnopus Humboldtii A. Br.; Allen, Char. Am. 2. 1880. 

 Chara depauperata Allen, Bull. Torrey Club 21: 167. pi. 192. 1894. 

 Chara zeylanica H. & J. Groves, in Urban, Symb. Antill. 7: 40. 1911. 



In fresh-water and brackish ponds. New Providence, Great Bahama, Abaoo, 

 Cat Island, and Great Exuma : Pennsylvania to South America. Type from South 

 America. The type of C. depauperata, here considered a synonym, was from New 

 Providence. 



3. Chara haitensis Turpin, Diet. Sci. Nat. Veg. Acot. pi. 101. (Livr. 40: pi. 1). 



1826. 



Chara polyphylla A. Br. Flora 18 : 70. 1835. 

 Chara Michauxii A. Br. Am. Jour. Sci. 46: 93. 1844. 

 Chara gymnopus Michauxii A. Br. ; Allen, Char. 2. 1880. 

 Chara zeylanica Michauxii H. & J. Groves, iu*Urban, Symb. Antill. 7: 42. 

 1911. 



In fresh-water and brackish ponds. Inagua : Illinois and Virginia to Haiti, 

 Jamaica, and South America. Type from Haiti. 



Sub-class MYXOPHYCEAE. 



Contributed by FRANK S. COLLINS. 



Family 1. CHROOCOCCACEAE 



1. CHROOCOCCTJS Nag. Gatt. 45. 1849. 



Cells 3-8 u in diameter. 1. C. memtraninus. 



Cells 13-25 M in diameter. 2. C. turgidus. 



1. Chroococcus menibraninus (Menegh.) Nag. Gatt. 46. 1849. 



Pleurococcus membraninus Menegh. Monogr. 34. pi. 4. f. 1. 1843. 



Among other small algae, in company with Chroococcus turgidus, Caicos Islands : 

 Europe ; Bermuda. Type from Italy. 



2. Chroococcus turgidus (Kiitz.) Nag. Gatt. 46. 1849. 



Protococcus turgidus Kiitz. Tab. Phyc. 1: 5. pi. 6. f. 1. 1846. 



Among other blue-green algae, Caicos Islands : of world-wide distribution, 

 marine and fresh water. Type from Europe. 



2. APHAJSTOCAPSA Nag. Gatt. 52. 1849. 

 1. Aphanocapsa Howei Collins, sp. nov. 



Marina. Cellulis 9-15 /u diam., sphaericis, raro subfusiformibus, mem- 

 brana pertenui, plasmate homogeneo; cellulis in gelatina communi hyalina mol- 

 lissima inordinatis; strato obscuro- vel atro-aerugineo. 



Cells 9-15 fj, in diameter, spherical or rarely slightly fusiform, wall very 

 thin, substance homogeneous, color pale aeruginous; forming a dull or dark 

 aeruginous stratum, united by thin, homogeneous common gelatine, closely set 

 in no definite order. 



