428 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



A small tuft of this plant was found in termingled between several 

 other algæ. The cells in the basal part were about 150 /i thick and up 

 to ten times as long, upwards gradually shorter and thinner, the cells 

 in the upper ramuli being only about 70// thick and a few times longer. 



Found in shallow water, near the shore in a rather unpro- 

 tected place. 



St. Croix: Coakley Bay. 



29. Cladophora fascicularis ( Mert.) Kiitz. 



30. — crispula Vickers. 



31. — heteronema (Ag.) Kiitz. 



32. Anadyomene stcllata (Wulf.) Ag. 



33. Microdictyon uinbilicatum (Veil.) Zanard. 



34. Valonia ventricosa J. Ag. 



35. — macrophysa Kiitz. 



36. — utricularis (Roth) Ag. 



37. — Ægagropila C. Ag. 



38. Dictyosphæria favulosa (Ag.) Decsne. 



39. — van Bosseæ Børgs. 



40. Cladophoropsis membranacea (Ag.) Børgs. 



41. Boodlea Siamensis Reinb. 



42. Stnivea elegans Børgs. 



43. Struvea anastomosans (Harv.) Piccone. 



44. Chamædoris Peniculum (Sol.) O. Kuntze. 



45. Siphonocladus tropicus (Crouan) J. Ag. 



46. Ernodesrais verticillata (Kütz.) Børgs. 



47. Neomeris annulata Dickie. 



48. Batophora Oersted! J. Ag. 



49. Acetabularia Caliculus Quoi et Gaimard. 



50. — crenulata Lamx. 



51. Acicularia Schenckii (Mob.) Solms. 



52. Avrainvilleav nigricans Decsne. 



53. — Mazei Murray & Boodle. 



54. — Creppii Børgs. 



55. — • asarifolia Børgs. 



56. Rhipilia tomentosa Kütz. 



57. Cladocephalus luteofuscus (Crouan) Børgs. 



58. Penicillus capitatus Lamarck. 



forma ty pica. 

 — laxa. 



