604 DASYCLADACEAE. 



Valpnia occllata is perhaps related to Dictuosjriiarria valonioides Zanard., which 

 Hauok believed to be a condition of Valonia macrophysa, but manifestly differs in 

 its smaller cells, in never being hollow, and rarely, if ever, globose, and in the 

 absence of large vesicular marginal cells. Specimens from Bermuda and the West 

 Indies have sometimes been referred to Valonia utricularis forma Crustacea Kuck., 

 from which it differs in having its superior parts divided by cross-walls into more 

 or less polyhedral or angulate-subglobose cells instead of consisting of interwoven 

 and compacted clavate or obovoid cells. The plant bears some resemblance to young 

 stages of species of Dictyosphaeria but the small-celled or facetted parts are usually 

 elongate, vittate, or irregularly discoid, very rarely subglobose. It occurs in great 

 abundance in lagoons, often associated with Valonia Aegagropila and remaining per- 

 fectly distinct. It is found in a great variety of habitats and it evidently deserves 

 a distinctive specific name, at least until such time as cultures may prove it to be 

 capable of assuming the characters of some previously described species. 



Family 8. DASYCLADACEAE. 



1. DASYCLADUS Ag. Flora 10': 640. 1S27. 



1. Dasycladus vermicularis (Scop.) Krasser, Ann. K. K. Xaturhist. Hofmus. 

 13: 459. 1899. 



Spongia vermicularis Scop. Fl. Cam. 2: 412. pi. 64. 1772. 

 Conferva clavaeformis Both, Cat. Bot. 3: 315. 1806. 

 Fucus vermicularis Bertol. Amoen. Ital. 308. 1819. 

 Dasycladus clavaeformis Ag. Sp. Alg. 2: 16. 1828. 



On stones, shells, etc., in shallow water, mostly in protected bays. New Provi- 

 dence, Rose Island, Berry Islands, North Cat Cay, Exuma Chain, Caicos Islands, 

 Castle Island, and Great Ragged Island : Bermuda, Florida. Cuba, and Jamaica ; 

 Canary and Madeira Islands ; Mediterranean and Adriatic seas. Type from Adri- 

 atic Sea. 



2. BATOPHORA J. Ag. Ofv. K. Vet.-Akad. Forh. 11: 107. 1854. 



Botkyophora J. Ag. Till Alg. Syst. 5: 139. 1887. Not Botryophora Bom- 



pard, Hedwigia 6: 129. 1867. 

 Coccocladus Cramer, Neue Denkschr. Schweiz. Naturf. Ges. 30:-(37). 1887. 



1. Batophora Oerstedi J. Ag. Ofv. K. Vet.-Akad. Forh. 11: 108. 1854. 



Botryophora Conquerantii Crouan; Cramer, Neue Denkschr. Schweiz. Na- 



turf. Ges. 32:-(6). pi. 4. f. 1. 1890. 

 Coccocladus occidentalis Conquerantii M. A. Howe, Bull. Torrey Club 31: 



96. 1904. 

 Coccocladus occidentalis laxus M. A. Howe, loc. cit. 95. pi. 6. f. 1, 2. 



Common in lagoons, creeks, ponds, and sink-holes of salt or brackish water, the 

 laxer conditions in water that is almost fresh. New Providence, Rose Island, Berry 

 Islands, Great Bahama, Andros, Exuma Chain, Watling's Island, Caicos Islands, 

 Acklin's Island, and Great Ragged Island : Florida to Guadeloupe. Type from 

 Krause's Lagoon, St. Croix. 



la. Batophora Oerstedi occidentalis (Harv.) M. A. Howe, Bull. Torrey Club 

 32: 579. 1905. 



Dasycladus occidentalis Harv. Ner. Bor.-Am. 3: 38. 1858. 

 Botryophora occidentalis J. Ag. Till Alg. Syst. 5: 141. 1887. 

 Coccocladus occidentalis Cramer, Neue Denkschr. Schweiz. Naturf. Ges. 

 30:-(37). 1887. 



On stones, shells, etc., in shallow salt water, mostly in protected bays, common. 

 New Providence, Andros, Berry Islands, Great Bahama, Exuma Chain, Cat Island, 

 Watling's Island, Mariguana, and Great Ragged Island : Bermuda, Florida, and 

 Cuba. Type of variety from Key West, Florida. 



