Marine Algae from Eniwetok — Dawson 
129 
or yellow green in H. lyngbyaceum) . In the 
latter the cross walls are granulated unlike 
H. coccinenm. 
Hydrocokum glutinosum (C Agardh) Gomont 
1892: 339 (Sweden) 
Fig. 31/ 
D. 13661, 13668, 13756, 13842. 
Hydrocokum comoides (Harvey) seq. Gomont 
1892: 335, pi. 12, figs. 3-5 (Australia); 
Taylor 1950: 115 
Fig. 31® 
D. 13638, 13685, 13688, 13716, 13733. 
Hydrocokum lyngbyaceum Kiitzing seq. Go- 
mont; Dawson 1954: 380, fig. 3q 
D. 13653, 13667, 13671, 13827, 13870. P. 
2543, Runo Is. seaward reef, 3/8/55; P. 2802, 
Bokanjoio Is. seaward flats, 10/25/54; P. 
2810, Bokanjoio Is. lagoon, 3/8/55; P. 2823, 
Bokanjoio Is. seaward reef, 3/8/55; P. 2852, 
Mui Is. lagoon, 11/17/54; P. 2856, Aitsu Is. 
lagoon, 11/17/54. 
Hydrocokum cantharidosmum (Montagne) seq. 
Gomont 1892: 336, pi. 12, figs. 6, 7 
(Canary Islands); Taylor 1950: 116 
Fig. 3H 
T. 46-312. Not collected again. 
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