394 
Fig. 10. Dasycladus densus n. sp. a, Cross section of 
the thallus showing whorl of branches (some secondary 
and tertiary segments lost) (X 19); b> part of central 
axis showing connection of primary segments (X 85). 
latter being apiculate in D. clavaeformis) . The 
reproduction of D. densus is at present un- 
known, but with such similarities in vege- 
tative features there is little doubt that it 
should be placed in Dasycladus. 
Chloroclados australasicus Sonder (1871: 35, 
pi. 5, f. 1-6) from Cape Yorke, northern 
Australia, was distinguished from Dasycladus 
by the presence of cysts in the sporangia and 
differences in the branch whorls. The type of 
this species is in the Melbourne National 
Herbarium and agrees well with bonder’s fig- 
ures; however, no cysts are apparent in the 
sporangia, i.e., in the spherical inflated cells 
on the ends of the primary segments. Until 
preserved or fresh specimens can be examined, 
it seems justified to refer C. australasicus to 
Dasycladus as Cramer (1887: 37) has done. 
PACIFIC SCIENCE, VoL IX, October, 1955 
Fig. 11. Dasycladus densus. n. sp. Type. 
REFERENCES 
B0RGESEN, F. 1925. Marine algae from the 
Canary Islands, especially from Teneriffe 
and Gran Canaria. I. Chlorophyceae. K. 
Danske Vidensk. Selsk ., Biol. Meddel. 5 (3): 
1-123. 
Cramer, C. 1887. Ueber die virticillirten 
Siphoneen besonders Neomeris und Cym- 
opolia. Schweiz. Naturf. Gesell., Denkschr. 
30: 1-50, pi. 1-5. 
Egerod, L. E. 1952. An analysis of the si- 
phonous Chlorophycophyta, with special 
reference to the Siphonocladales, Siphon- 
ales, and Dasycladales of Hawaii. Calif. 
Univ ., Pubs ., Bot. 25 (5) : 325-454, pis. 29-42. 
Gepp, A., and E. S. Gepp. 1911. The Codia- 
ceae of the Siboga Expedition, including a 
monograph of Flabellarieae and Udoteae. 
