. Bulletin. Science; Natural history; Natural history. R: 11 .H V. Figs. 8-11. Veleroa subulata Daws. Thalli collected from nests of the garibaldi on or near New Hope Rock, Pt. Loma, San Diego Co., the type locality of Murrayellopsis dawsonii Post. Fig. 8. JS 2941. Polysiphonous branch with monosiphonous branchlets. 1 cm scale = 80 fim. Fig. 9. JS 1809. Cystocarps on next-to-basal cell of monosiphonous branchlets. 1 cm scale = 25 ^m. Fig. 10. JS 2941. Tetrasporangia in single row, smaller distally. 1 cm scale = 100 /xm. Fig. 11. JS 2941. Single and paired tetrasporangia in same row. 1 cm scale
. Bulletin. Science; Natural history; Natural history. R: 11 .H V. Figs. 8-11. Veleroa subulata Daws. Thalli collected from nests of the garibaldi on or near New Hope Rock, Pt. Loma, San Diego Co., the type locality of Murrayellopsis dawsonii Post. Fig. 8. JS 2941. Polysiphonous branch with monosiphonous branchlets. 1 cm scale = 80 fim. Fig. 9. JS 1809. Cystocarps on next-to-basal cell of monosiphonous branchlets. 1 cm scale = 25 ^m. Fig. 10. JS 2941. Tetrasporangia in single row, smaller distally. 1 cm scale = 100 /xm. Fig. 11. JS 2941. Single and paired tetrasporangia in same row. 1 cm scale = 100 ixm. the above description. In general appearance, the algae described as Veleroa sub- ulata are indistinguishable from any of the collections referred to Murrayellopsis dawsonii. Post (1962, 1963, 1964) stated that pericentral cells in Murrayellopsis dawsonii were 4-5 in number but all of the material examined in this study consistently showed four. Several instances of "cortication" were observed where the peri- central cells in several adjacent axial segments were apparently replaced by ir- regularly arranged, irregularly shaped small cells. These portions of the thalli were mostly basal, lacked branching, and in the habitats where the plants were collected, were in a layer of debris or sand grains close to the substrate. Polysiphonous branching is infrequent, but in those thalli where the axes branch, all such branches occur in the upper half or third of the axis, each one replacing a monosiphonous branchlet insofar as could be seen. A relatively densely branched axis bears up to 11 branches and each of these may bear 2,3 third-order branches which are unbranched or once-forked. The distal clustering above the long un- branched proximal portions of the axes gives a characteristic bushy aspect to individual axes. Degree of monosiphonous branchlet development parallels the extent of polysiphonous branching. Many axes are unbranched, with mostly short unbranch
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