NO. 9 ALGAE TAYLOR 7 



CLADOPHORACEAE 

 Chaetomorpha crassa (C. Agardh) Kiitzing 



Unattached, the filaments long, moderately flexuous but not con- 

 spicuously entangled, adhering well to paper ; cells 480-640 /x diameter, 

 1-2 diameters long, the nodes little constricted, the walls moderately 

 thick. 



Dredged in quantity at 20-30 m. over a sandy, weedy bottom in 

 Magdalena Bay, Baja California, Mexico {Schmitt 6), July 18, 1938. 



CAULERPACEAE 

 Caulerpa racemosa (Forsskal) J. Agardh, forma 



Apparently a reduced form. The erect branches were 1-3 cm. tall. 

 The branchlets were cylindrical, with the tips slightly tapered, about 

 1.5 mm. diameter, 3-10 mm. apart on the axis, often opposite, with 

 slight tendency to a bilateral arrangement. Without more ample mate- 

 rial it seems unwise to describe even a new form in this difficult genus. 



On rocks in shallow water to the south of the landing place, Clip- 

 perton Island, Mexico {Schmitt 14), July 21, 1938. 



Caulerpa sertularioides var. brevipes (J. Agardh) Svedelius 



In shallow water, Old Providence Island, Colombia {Schmitt 38), 

 August 6, 1938. 



CODIACEAE 

 Codium decorticatum (Woodward) Howe 



Branching irregular, the branches to 5 mm. diameter when dried, 

 the utricles unarmed, to 360-480 /x diameter. 



One piece dredged at 20-30 m. between Belcher Point and the 

 anchorage, Magdalena Bay, Baja California, Mexico {Schmitt 1), 

 July 18, 1938. 



Halimeda opuntia (Linnaeus) Lamouroux 



On a bottom of coral sand, shallow water, Old Providence Island, 

 Colombia {Schmitt 37), August 6, 1938. 



Halimeda simulans Howe 



In shallow water, Old Providence Island, Colombia {Schmitt 37), 

 August 6, 1938. 



