500 CAULEEPACEAE. 



Bryopsis pennata Lamour., a plant with long naked stalks and simply 

 pinnate terminal plumes (a plant more slender and delicate than the type of 

 the species), has been found growing on a rock at the low-water line at Castle 

 Harbor by Mr. Collins. (Phyc. Bor.-Am. 1871, 2166 and 2167.) 



Family CAULERPACEAE. 



Caulerpa prolifera (Forsk.) Lamour. has a particularly luxuriant develop- 

 ment in 3-10 feet of water in the ponds of the Walsingham region, where its 

 stolons, 2-3 feet long, send up stalked occasionally proliferous dark green 

 laminae that are 5-8 inches high and 5-1 inch broad. (Phyc. Bor.-Am. 1872.) 



Caulerpa sertularioides (S. G. Gmel.) M. A. Howe, though not uncommon 

 elsewhere, is particularly well developed in the locality just mentioned. Its 

 erect branches are regularly pinnate, with the numerous sharp-pointed sub- 

 terete ultimate ramuli scarcely coarser than bristles. (Phyc. Bor.-Am. 1873.) 



Caulerpa crassifolia (Ag.) J. Ag. also has pinnate branches, but its 

 pinnules are broader (aV^iV in. wide), and less numerous, distinctly flattened, 

 linear-oblong or subfalcate, slightly overlapping or free and spaced. The 

 species grows on rocks, stones, roots of mangroves, etc. in rather sheltered 

 places, as in Port Eoyal Bay, Hungry Bay, the ponds of "Walsingham, Harring- 

 ton Sound, Castle Harbor, etc. (Phyc. Bor.-Am. 1919.) 



Caulerpa cupressoides (West) Ag. has, in the Bermuda forms, the short 

 small sharp-pointed ramuli in several ranks. It is an extremely variable 

 species, originally described from the Danish West Indies. The prevailing 

 Bermuda form is the forma erici folia (Turn.) Web. v. Bosse, which was 

 described and figured from Bermuda by Turner in 1808. (Phyc. Bor.-Am. 

 1920.) 



Caulerpa racemosa occidentalis (J. Ag.) B^rg. is common in 1-20 feet 

 of water on rocks and piers in Hamilton Harbor. Its pyriform-clavate ulti- 

 mate ramuli, which are commonly rather abruptly swollen at the rounded- 

 obtuse apices, are in several or many irregular ranks. The largest specimens 

 seen came from Castle Harbor. In these the main branches are nearly two 

 feet long. Other varieties, also, of this species have been reported from 

 Bermuda. (Phyc. Bor.-Am. 2020, 2021 and 2022.) 



Caulerpa verticillata J. Ag. has been found by Hervey at St. George's 

 and what we take to be a form of it also at Harris Bay.* The latter, which 

 grew in a tide pool, appears to be a reduced or poorly developed condition of 

 forma charoides (Harv.) Web. v. Bosse. It has a creeping rhizome an inch 

 or more long, from which arise erect dark green composite branches a line or 

 two high. Under a lens these erect branches are seen to bear numerous short 

 hair-like branchlets which are rather irregularly arranged and several times 



* C. pnsilla Collins, Holden & Setchell, Phyc. Bor.-Am. 2019 — perhaps not C. 

 piisiUa Martens & Hering, which seems to be certainly known only from Pernambuco. 

 If it should be found impossible to maintain C. pusilla and C. verticillata as distinct 

 species, the rules of nomenclature would seem to require the conservation of the 

 name pusilla, as it probably had a slight priority, perhaps of only a few weeks or 

 days, in actual printed publication. 



