DASYCLADACEAE. 605 



3. NEOMERIS Lamour. Hist. Polyp. 241. 1816. 



Hairs monomorphous ; ends of branches of second order forming a cortex with dis- 

 tinct facets. 



Sporangia coherent laterally by their calcareous capsules, the plant thereby 

 appearing transversely annulate in the lower fertile parts. 1. A 7 , annulata. 

 Sporangia strongly calcified but mutually free. 2. N. mucosa. 



Hairs dimorphous, the two forms in alternating zones ; branches of 

 the second order subfusiform, scarcely forming a cortex, surface 

 of the plant after the fall of the hairs somewhat shaggy or 

 minutely and irregularly punctate ; sporangia free or coherent 

 in short rows of 2-8. 3. N. Cokeri. 



1. Neomeris annulata Dickie, Jour. Linn. Soc. Bot. 14: 198. 1874. 



Neomeris Kelleri Cramer, Neue Denkschr. Schweiz. Naturf. Ges. 30:- (3- 

 10, 3'9). pi. 1; pi. 2. f. 1-12; pi. 3. f. 1, 2. 1887. 



On stones, shells, etc., from near low-water mark down to a depth of 50 meters 

 (fide Borgesen). New Providence, Rose Island, Berry Islands, Great Bahama, North 

 Cat Cay, Mariguana, Caicos Islands, Castle Island, and Great Ragged Island : 

 Bermuda and Florida to Barbados ; Mauritius, Madagascar, and the Dutch East 

 Indies. Type from Mauritius. 



2. Neomeris mucosa M. A. Howe, Bull. Torrey Club 36: 84. pi. 1. f. 5 ; pi. 5. f. 



1-14. 1909. 



On moderately exposed rocks, at and near low-water mark, often with other 

 species of the genus. Atwood Cay, Caicos Islands, and Great Ragged Island. Ap- 

 parently endemic. Type from Atwood Cay. 



3. Neomeris Cokeri M. A. Howe, Bull. Torrey Club 31: 97. pi. 6. f. 3-12. 



1904. 



Common, usually under shelving rocks, near low-water line, occasionally on 

 shells and pebbles in deeper water. New Providence, Berry Islands, Great Bahama, 

 Gun Cay, Eleuthera, Exuma Chain, Atwood Cay, Castle Island, and Great Ragged 

 Island. Apparently endemic. Type from opposite Current Town, Eleuthera. 



4. CYMOPOLIA Lamour. Hist. Polyp. 292. 1816. 



1. Cymopolia barbata (L.) Lamour. loc. cit. 293. 



Corallina barbata L. Syst. Nat. 1: 806. 1758. 



Coralline, Rosarium Ell. & Soland. Nat. Hist. Zooph. 111. pi. 21. f. h, H. 



H^. 1786. 



Cymopolia Eosarium Lamour. loc. cit. 294. 

 Cymopolia bibarbata Kiitz. Phyc. Gen. 312. 1843. 

 Cymopolia unibarbata Kiitz. loc. cit. 313. 

 Cymopolia mexicana J. Ag. Till Alg. Syst. 5: 147. 1887. 



On rocks and stones in shallow, moderately agitated water. New Providence, 

 Andros. Berry Islands, and Mariguana : Florida, Cuba, Jamaica, Haiti, Porto Rico, 

 and Mexico ; reported also from Canary Islands and Spain. Type from Jamaica. 



5. ACETABULUM (Tourn.) Ludwig. Def. Gen. PI. 504. 1760. 

 OLIVIA Bertol. Ear. PI. Ital. Dec. 3: 117. 1810. 

 ACETABULARIA Lamour. Nouv. Bull. Sci. Soc. Philom. 3: 185. 1812. 

 POLYPHYSA Lamarck; Lamour. Hist. Polyp. 250. 1816. 



Plants large or medium-sized (discs 5-18 mm. broad) ; hypo- 



peltal processes present. 1. A. crenulatum. 



Plants small or minute (discs 1-5 mm. broad) ; hypopeltal 



processes wanting. 



Discs 2-5 mm. broad; coronal processes 75-150ytt in 

 radial diameter, with 513 hairs or hair-rudiments ; 



aplanospores 88-190 /j, in diameter. 2. A. polyphysoidcs. 



Discs 1-2.5 mm. broad ; coronal processes 22-35 /j, in 

 radial diameter, with 2 (rarely 3) hairs or hair- 

 rudiments ; aplanospores 68-82 # in diameter. 3. A. pusillum. 



