616 C'ODIACEAE. 



5. Halimeda tridens (EU. & Soland.) Lamour. Hist. Polyp. 308. 1816. 



Corallina tridens Ell. & Soland. Nat. Hist. Zooph. 109. 1786. 

 CoralUna incrassata Ell. & Soland. loc. cit. 111. 

 Salimeda incrassata Lamour. Hist. Polyp. 307. 1816. 

 Halimeda irevicauUs Kiitz. Tab. Phye. 8: 11. pi. SS. f. II. 1858. 



Very common on a sandy or muddy bottom from near tbe low-water mark down 

 to 40 meters or more. New Providence, Rose Island, Andros, Great Bahama, North 

 Cat Cay, Green Cay, BJxuma Chain. Cat Island, Watling's Island, Atwood Cay, 

 Mariguana, Caicos Islands, Castle Island, Great Bagged Island, Salt Cay, and 

 Anguilla Isles : — Bermuda and Florida to Guadeloupe ; also in the tropical seas of 

 the Eastern Hemisphere. Type from the Bahama Islands. 



6. Halimeda .Monile (Ell. & Soland.) Lamour. Hist. Polyp. 306. 1816. 



Corallina Monile EU. & Soland. Nat. Hist. Zooph. 110. 1786. 

 Halimeda incrassata monilis Harv. Ner. Bor.-Am. 3: 24. 1858. 

 Halimeda tridens Monile M. A. Howe, BuU. Torrey Club 32: 564. 1905. 



Common on a sandy bottom, often with H. tridens and fl". simulans, but dis- 

 tinct. Rose Island, Cat Island, Watling's Island, Mariguana, Caicos Islands, Great 

 Bagged Island, Salt Cay, and Anguilla Isles : — ^Bermuda and Florida to Guadeloupe 

 and Panama (Colon). Type from Jamaica. 



7. Halimeda simulans M. A. Howe, Bull. Torrey Club 34; 503. pi. S9. 1907. 



On a sandy bottom, rocks, old corals, etc., from near low-water mark down to 

 a deptl; of several meters. Berry Islands, Atwood Cay, Mariguana, Caicos Islands, 

 and Great Bagged Island ; — Bermuda. Florida, Cuba, Jamaica, Porto Eico, American 

 Virgin Islands, and Panama (Colon). Type from Culebra Island, Porto Rico. 



8. Halimeda favul6sa M. A. Howe, Bull. Torrey Club 32: 563. pi. SS ; pi. $i; 



pi. S6. f. 1-6. 1905. 



On a sandy bottom in shallow water. Rose Island and Esuma Chain. Type 

 from Cave Cays, Bxuma Chain. Apparently endemic. 



9. Halimeda lacrimosa M. A. Howe, Bull. Torrey C!lub 36 : 93. pi. 4. f. 1 ; pi. 6. 



f. 3-11. 1909. 



On a sandy bottom from near low-water mark down to a depth of 10—20 

 meters or more. Bxuma Chain, Mariguana, and Great Ragged Island : — Cuba. 

 Type from Mariguana. 



8. CODIXJM Staekh. Ner. Brit, xvi, xxii, xxiv. 1797. 



Lamarckia Olivi, Zool. Adriat. 258. 1792. Not Lamarckia Medic. 1789. 



Spongodiitm Lamour. Essai 71, 72. 1813. 



Agabdhia Cabrera; Ag. Syn. Alg. Scand. xxiv. 1817. 



Thallus mostly erect and fruticose. 



Peripheral utricles cylindric-clavate, mostly 75-200 u. in max. diam. ; thallus dull 

 and rather rigid when dry, the branches not con- 

 stricted at base. 1. G. tomentosum. 

 Perinheral ntricles obovoid. obconic, or soblet-shaoed, 

 mostly l.'iO— SOOjt in max. diam.; thallus commonly 

 nitent and rather flaccid when dry, the branches con- 

 stricted at b.nse. 2. C.isthmocladum. 

 Thallus adherent, prostrate, or repent. 3. C.intertextum. 



1. Codium tomentosum (Huds.) Staekh. Ner. Brit. xxiv. 1797. 

 Fucus tomentosus Huds. M. Angl. 584. 1778. 



On rocks, etc.. in shallow water. North Cnt Cay. Eleuthera. Atwood Cav. and 

 Caicos Islands; — Bermuda and North Carolina to Panama (Colon) and South 

 America ; widely distributed in the warmer seas. Type from Great Britain. 



Codium decorticatum (Woodw.) M. A. Howe ((7. elongatum Ag.) has not yet 

 been reported from the Bahamas, but is likely to occur. It differs from C. tomen- 

 tosum !n being more elongate, more sparingly branched, by flattened expansions 

 under the dichotomies, and by the much larger utricles. 



