Sees mete eres rs ae - a s b2e€€S00 T0E0 0 oY 1OHM/18W ALLAN HANCOCK PACIFIC EXPEDITIONS VOLUME 26 NUMBER 1 MARINE RED ALGAE OF PACIFIC MEXICO PART 7 CERAMIALES: CERAMIACEAE, DELESSERIACEAE BY E. YALE DAWSON THE UNIVERSITY OF SOUTHERN CALIFORNIA PRESS LOS ANGELES, CALIFORNIA 1962 : ea ee ALLAN HANCOCK PACIFIC EXPEDITIONS VOLUME 26 1962 UNIVERSITY OF SOUTHERN CALIFORNIA PRESS LOS ANGELES, CALIFORNIA INDEX OF SCIENTIFIC NAMES Numbers in bold face type refer to plates abysicola, Pleonosporium, 38, 39, 133 abyssicolum, Hypoglossum, 77, 78 attenuatum, 77, 78 175 Acrochaetium amphiroae, 30 grateloupiae, 29 Acrosorium, 76 uncinatum, 94, 193 acutum, Callithamnion, 25 affine affine, Ceramium, 50 Ceramium, 50, 141 affine, 50 peninsularis, Ceramium, 51, 141 Aglaothamnion, 3, 35, 37 brodiaei, 36, 37, 131 caudatum, 36 cordatum, 36, 131 furcellariae, 36 monopodum, 35 neglectum, 36 sarcodiae, 36 scopulorum, 36 tenuissimum, 36 tripinnatum, 36 alternans, Antithamnion, 11 ambigua, Phycodrys, 87 amphiroae, Acrochaetium, 30 Rhodochorton, 30 ample, Phycodrys, 88, 91, 195, 19 andersoniana, Nienburgia, 86, 189, andersonianum, Neuroglossum, 86 Anisocladella, 76 pacifica, 93, 197 antarctica, Phycodrys, 88 anthericephala, Griffithsia, 70, 163 antillanum, Antithamnion, 18 Antithamnion, 3, 4, 5, 10, 20, 21 alternans, 11 antillanum, 18 asymmetricum, 10 basisporum, 13 baylesiae, 13 breviramosus, 14, 19, 23, 137 simplex, 14, 117 cladodermum, 21 corallina, 13 corticatum, 11, 21 cristirhizophorum, 12, 17 defectum, 11 dendroideum, 13, 15, 113, 117 densiusculum, 13 dumontii, 13 floccosum, 13 gardneri, 10 glanduliferum, 13, 15, 115 graffei, 13 hubbsii, 12, 16, 117, 119 kylinii, 11, 17, 21, 119 lherminieri, 12, 18, 117 mcnabbii, 13, 18, 117 miharai, 11, 13, 16 nigricans, 13 nipponicum, 11 occidentale, 14 pacificum, 12, 19, 115 palmyrense, 12 pectinatum laxa, 7 percurrens, 11 plumulum, 4, 5, 7, 119 crispum, 4, 5, 7 plumulum, 5, 11, 19 pseudocorticatum, 12, 20, 121 pteroton, 11 pulchellum, 12 pygmaeum, 11, 21, 119 scrippsiana, 15, 16 secundatum, 11, 22, 121 setaceum, 11, 22, shimamuranum, 11 similans, 14 simulans, 12 sparsum, 11 spirographidis, 10 sublittorale, 12, 22, 121 subulatum, 13 terminale, 14 thouarsii, 11 uncinatum, 12 veleroae, 13 arborescens, Callithamnion, 25 asymmetricum, Antithamnion, 10 attenuata, Crouania, 23, 121 Mesogloia, 23 Spermothamnion snyderae, 45 attenuatum abyssicolum, Hypoglossum, 77, 78, 175 attenuatum, Hypoglossum, 78 Batrachospermum, 23 Hypoglossum, 77 attenuatum, 78 australe, Callithamnion bisporum, 26, austrogeorgica, Phycodrys, 87 avalonae, Ceramium, 52, 53 balboensis, Griffithsia multiramosa, 71 basisporum, Antithamnion, 13 Batrachospermum attenuatum, 23 baylesiae, Antithamnion, 13 bellum, Centroceras, 69, 161 bicorne, Ceramium, 64 biseriatum, Callithamnion, 26 bisporum, Callithamnion, 25, 27 australe, Callithamnion, 26, 125 Bossiella, 30 Botryoglossum, 76 farlowianum, 101, 207 boydenii, Ceramium, 46 Branchioglossum, 75 macdougalii, 77 undulatum, 76, 173 woodii, 77, 84, 175, 185 breviarticulatus, Ectocarpus, 67 breviramosum, Callithamnion, 25, 27, 123 breviramosus, Antithamnion, 14, 19, 23, 137 simplex, Antithamnion, 14, 117 brodiaei, Aglaothamnion, 36, 37, 131 Callithamnion, 37 bullata, Phycodrys, 87 byssoides, Callithamnion, 37 byssoideum, Ceramium, 57 gracillimum, 48, 57, 147, 149 caespitosa, Myriogramme, 94, 96, 201 californica concinna, Ptilota, 75 Delesseria, 93 Holmesia, 70, 177, 179 Sorella delicatula, 83 californicum, Callithamnion, 25 dasyoides, 40 Ceramium, 47, 51, 147 Erythroglossum, 93, 199 californicus, Loranthophycus, 80 Calliarthron, 30 Callithamnion, 3, 24 acutum, 25 arborescens, 25 biseriatum, 26 bisporum, 25, 27 australe, 26, 125 breviramosum, 25, 27, 123 brodiaei, 37 byssoides, 37 californicum, 25 callophyllidicola, 25 catalinae, 25 catalinense, 28, 125 compactum, 26, 29, 125 cordatum, 36 corymbosum, 26 dasyoides, 40 californicum, 40 ecuadoreanum, 25 elegans, 3 endovagum, 24, 29, 123 epiphyticum, 26 flocossum pacificum, 19 laxum, 25 lejolisea, 24, 30, 123 lherminieri, 18 marshallense, 26, 31, 127 minutissima, 26, 32 pacificum, 26 paschale, 26, 31, 125 pikeanum, 25 ramosissimum, 25, 26, 32, 127 rigidum, 26, 33, 127 rupicolum, 26, 33, 35, 129 soccoriense, 25, 26, 34, 129 squarrulosum, 25 uncinatum, 26, 35, 129 varispiralis, 27 veleroae, 31 callophyllidicola, Callithamnion, 25 camouii, Ceramium, 49, 52, 141, 143 Campylaephora crassa, 46 hypnaeoides, 46 catalinae, Callithamnion, 25 catalinense, Callithamnion, 28, 125 caudatum, Aglaothamnion, 36 Ceramium, 50, 52, 61, 62, 143, 145, 147 Centroceras, 2, 52 bellum, 69, 161 clavulatum, 68, 159, 161 eatonianum, 54 Ceramiaceae, 2 Ceramium, 2, 46 affine, 50, 141 affine, 50 peninsularis, 51, 141 avalonae, 52, 53 bicorne, 64 boydenii, 46 byssoideum, 57 californicum, 47, 51, 147 camouii, 49, 52, 141, 143 caudatum, 50, 52, 61, 62, 143, 145, 147 cimbricum, 50 clarionense, 50, 53, 143 clavulatum, 68 codicola, 46, 54, 64, 145, 147 codiophila, 54 crassum, 46 cruciatum, 60 eatonianum, 46, 54, 145 equisetoides, 49, 55, 145 evermannii, 47, 51, 55, 149 fastigiatum, 65 fimbriatum, 48, 56, 145, 147 gardneri, 49 gracillimum, 57 byssoideum, 48, 57, 147, 149 hamatispinum, 47, 57, 151 hoodii, 47 horridum, 46, 58, 153 howellii, 47, 58, 149, 151 hypnaeoides, 46 interruptum, 65 japonicum, 47 johnstonii, 65 kondoi, 47 marshallense, 48 masonii, 57 mazatlanense, 49, 59, 153 mucronatum, 49 nakamurai, 49 obesum, 46, 60, 151 ornatum, 50, 60, 155 pacificum, 46, 47, 61, 153, 155 paniculatum, 47, 61, 153 personatum, 47, 49, 50, 61, 62, 165 procumbens, 48, 63, 155, 157 recticorticum, 48, 57, 63, 155 rubrum, 47 pacificum, 61 serpens, 49, 64, 157 sinicola, 47, 48, 157 interruptum, 65, 161 johnstonii, 65 sinicola, 64, 161 sympodiale, 48 taylorii, 48, 57, 65, 159 templetonii, 49, 55 tenerrimum, 49 tenuissimum, 50 transversale, 57 vagabunde, 49, 66, 161 viscainoense, 47, 67, 161 washingtoniense, 47 zacae, 50, 67, 159 sp., 66 cimbricum, Ceramium, 50 cladodermum, Antithamnion, 21 clarionense, Ceramium, 50, 53, 143 clavulatum, Centroceras, 68, 159, 161 Ceramium, 68 clevelandii, Platysiphonia, 81, 82, 185, 187 Taenioma, 81 eodiegl, Ceramium, 46, 54, 64, 145, 14 codicolum, Pleonosporium, 38, 39, 3 codiophila, Ceramium, 54 Codium, 17, 37, 38, 40, 41, 44, 51, 53, 54, 59, 65, 98 fragile, 40, 44, 68 hubbsii, 44 Coeloseira pacifica, 64 colombiana, Lejolisia, 43, 141 compa eas Callithamnion, 26, 29, 1 complanatum, Pleonosporium, 38 concinna, Ptilota californica, 75 Conferva plumula, 19 corallina, Antithamnion, 13 corallinara, Cryptopleura, 97, 98, 205 corallinarum, Nitophyllum, 98 cordatum, Aglaothamnion, 36, 131 Callithamnion, 36 corticatum, Antithamnion, 11, 21 corymbosum, Callithamnion, 26 coulteri, Microcladia, 73, 167 crassa, Campylaephora, 46 crassum, Ceramium, 46 crispa, Cryptopleura, 97, 100, 205 crispum, Antithamnion plumulum, 4, a Platythamnion, 4 cristirhizophorum, Antithamnion, 12, 17 Crouania, 3 attenuata, 23, 121 cruciatum, Ceramium, 60 cryptoneurum, Cryptopleura, 97 Cryptopleura, 76, 97 corallinara, 97, 98, 205 crispa, 97, 100, 205 cryptoneurum, 97 dichotoma, 97 hayamensis, 97 imbricata, 97, 98, 197, 203 lobulifera, 97, 98, 99, 199 membranacea, 98 peruviana, 97 ruprechtiana, 98 spathulata, 97 spatulata, 97, 100, 203 violacea, 97, 98, 101, 199 dasyoides californicum, Callithamnion, 4 Callithamnion, 40 Pleonosporium, 38, 40, 42, 133 defectum, Antithamnion, 11 Delesseria californica, 93 woodii, 77 Delesseriaceae, 75 delicatula californica, Sorella, 83 Erythroglossum, 83 Prionitis, 29 Sorella, 83, 175 dendroideum, Antithamnion, 13, 15, US, IZ densa, Neoptilota, 74, 173 Ptilota, 74 densiusculum, Antithamnion, 13 dichotoma, Cryptopleura, 97 divaricata, Myriogramme, 95, 97, divaricatum, Erythroglossum, 83 dumontii, Antithamnion, 13 eatonianum, Centroceras, 54 Ceramium, 46, 54, 145 Ectocarpus breviarticulatus, 67 ecuadoreanum, Callithamnion, 25 elegans, Callithamnion, 3 Gymnothamnion, 3, 109 Phycodrys, 87 endovagum, Callithamnion, 24, 29, 123 epiphyticum, Callithamnion, 26 equisetoides, Ceramium, 49, 55, 145 Equisetum, 55, 67 Erythroglossum, 76 californicum, 93, 199 delicatula, 83 divaricatum, 83 evermannii, Ceramium, 47, 51, 55, 49 farlowianum, Botryoglossum, 101, 207 Nitophyllum, 101 fastigiatum, Ceramium, 65 filamentosa, Spyridia, 69, 167 filamentosus, Fucus, 69 filicina, Ptilota, 75, 173 plumosa, 75 fimbriata, Phycodrys, 88 Tae na Ceramium, 48, 56, 145, 14 floccosum, Antithamnion, 13 gocosar pacificum, Callithamnion, 1 fragile, Codium, 40, 44, 68 Fucus filamentosus, 69 laceratus uncinatus, 94 furcellariae, Aglaothamnion, 36 Galaxaura umbellata, 18 gardneri, Antithamnion, 10 Ceramium, 49 Polycoryne, 92, 185 ging en Antithamnion, 13, 15, globuliferum, Pleonosporium, 38, 41, 137 Gracilaria, 37 gracillimum byssoideum, Ceramium, 48, 57, 147, 149 Ceramium, 57 graffei, Antithamnion, 13 Grateloupia, 29 hancockii, 30 prolongata, 30, 63 grateloupiae, Acrochaetium, 29 Griffithsia, 3, 70 anthericephala, 70, 163 multiramosa, 70, 71, 171 balboensis, 71 minor, 71 ovalis, 70, 72. 165 pacifica, 70, 72, 165, 167, 169 tenuis, 70, 73, 169 Grinnellia, 75 lanceolata, 84, 185 Gymnothamnion, 3 elegans, 3, 109 Haliotus, 83 Haloplegma, 2 mexicanum, 43 hamatispinum, Ceramium, 47, 57, 151 hancockii, Grateloupia, 30 hancockii, Polyneurella, 85, 187 Polyneurella hancockii, 85, 187 ~ rhizoidea, Polyneurella, 86, 181 Haraldia, 76 prostrata, 92, 197 hayamensis, Cryptopleura, 97 heteromorphum, Platythamnion, 4, 5, 9, 115 reversum, Platythamnion, 8, 9 hollenbergii, Myriogramme, 95, 199 Holmesia, 75 californica, 80, 177, 179 hoodii, Ceramium, 47 horridum, Ceramium, 46, 58, 153 Platythamnion, 6 howellii, Ceramium, 47, 58, 149, 151 hubbsii, Antithamnion, 12, 16, 117, 119 Codium, 44 Hymenena latissima, 85 hypnaeoides, Campylaephora, 46 Ceramium, 46 Hypnea, 32 Hypoglossum, 75 abyssicolum, 77, 78 attenuatum, 77 abyssicolum, 77, 78, 175 attenuatum, 78 retusum, 79, 177 a Se Cryptopleura, 97, 98, 197, 03 intermedium, Platythamnion, 5, 6, 10 interruptum, Ceramium, 65 sinicola, 65, 161 japonicum, Ceramium, 47 johnstonii, Ceramium, 65 sinicola, 65 kobayashii, Pleonosporium, 39 kondoi, Ceramium, 47 kylinii, Antithamnion, 11, 17, 21, 119 laceratus uncinatus, Fucus, 94 Laminaria, 16 lanceolata, Grinnellia, 84, 185 latissima, Hymenena, 85 Polyneura, 85, 187 Laurencia, 64, 70 laxa, Antithamnion pectinatum, 7 laxum, Callithamnion, 25 Platythamnion pectinatum, 6 reversum, 9 lejolisea, Callithamnion, 24, 30, 123 Lejolisia, 3 colombiana, 43, 141 lherminieri, Antithamnion, 12, 18, ily Callithamnion, 18 lobulifera, Cryptopleura, 97, 98, 99, 199 lobuliferum, Neuroglossum, 99 Loranthophycus californicus, 80 lucasana, Phycodrys, 88, 90, 181, 193 macdougalii, Branchioglossum, 77 Macrocystis, 77, 96 macrourum, Taenioma, 83 marshallense, Callithamnion, 26, 31, Ceramium, 48 masonii, Ceramium, 57 mazatlanense, Ceramium, 49, 59, 153 menabbii, Antithamnion, 13, 18, 117 membranacea, Cryptopleura, 98 Membranoptera, 75, 80 spatulata, 79, 177 Mesogloia attenuata, 23 mexicana, Pleonosporium, 38 mexicanum, Haloplegma, 43 Pleonosporium, 41, 139 Microcladia, 2 coulteri, 73, 167 miharai, Antithamnion, 11, 13, 16 minor, Griffithsia multiramosa, 71 minutissima, Callithamnion, 26, 32 monopodum, Aglaothamnion, 35 mucronatum, Ceramium, 49 multiramosa balboensis, Griffithsia, 71 Griffthsia, 70, 71, 171 minor, Griffithsia, 71 Myriogramme, 76, 94 caespitosa, 94, 96, 201 divaricata, 95, 97, 187, 191 hollenbergii, 95, 199 osorioi, 95, 96, 202 spectabilis, 94, 95, 199 subdichotoma, 81 nakamurai, Ceramium, 49 neglectum, Aglaothamnion, 36 Neoptilota, 2 densa, 74, 173 Neuroglossum andersonianum, 86 lobuliferum, 99 Nienburgia, 76, 92 andersoniana, 86, 189, 191 nigricans, Antithamnion, 13 nipponicum, Antithamnion, 11 Nitophyllum corallinarum, 98 farlowianum, 101 spectabile, 95 violaceum, 101 obesum, Ceramium, 46, 60, 151 occidentale, Antithamnion, 14 orbigniana, Platythamnion, 4, 6, 8, 9 ornatum, Ceramium, 50, 60, 155 osorioi, Myriogramme, 95, 96, 201 ovalis, Griffithsia, 70, 72, 165 pacifica, Anisocladella, 93, 197 Coeloseira, 64 Griffithsia, 70, 72, 165, 167, 169 pacificum, Antithamnion, 12, 19, 115 Callithamnion, 26 flocossum, 19 Ceramium, 46, 47, 61, 153, 155 rubrum, 61 palmeri, Sargassum, 14 palmyrense, Antithamnion, 12 paniculatum, Ceramium, 47, 61, 153 parva, Platysiphonia, 82, 185 paschale, Callithamnion, 26, 31, 125 pectinatum laxa, Antithamnion, 7 laxum, Platythamnion, 6 Platythamnion, 4, 6, 20, 109, 115 Pelagophycus porra, 21 peninsaat, Ceramium affine, 51, 1 percurrens, Antithamnion, 11 perpusilla, Polysiphonia, 82 perpusillum, Taenioma, 82, 181, 201 personatum, Ceramium, 47, 49, 50, 61, 62, 165 peruviana, Cryptopleura, 97 phycodricola, Polycoryne, 92 Phycodrys, 76, 87, 90, 92 ambigua, 87 amplissima, 88, 91, 195, 197 antarctica, 88 austrogeorgica, 87 bullata, 87 elegans, 87 fimbriata, 88 lucasana, 88, 90, 181, 193 profunda, 87, 89, 181 pulchra, 87 quercifolia, 88 radicosa, 90 riggii, 88 setchellii, 88, 89, 92, 197 simplex, 87, 90, 183 sinuosa, 88 Phyllospadix, 28, 93 pikeanum, Callithamnion, 25 pinnata, Sorella, 77, 84, 183, 187 pinnatum, Pleonosporium, 38 Platysiphonia, 76 clevelandii, 81, 82, 185, 187 parva, 82, 185 Platythamnion, 3, 4, 5, 14, 20 crispum, 4 heteromorphum, 4, 5, 9, 115 reversum, 8, 9 horridum, 6 intermedium, 5, 6, 10 orbigniana, 4, 6, 8, 9 pectinatum, 4, 6, 20, 109, 115 laxum, 6 plumulum, 5 reversum, 5, 8, 109 laxum, 9 tepocensis, 6, 7, 111 villosum, 5, 9, 113, 115 yezoensis, 5, 6 Pleonosporium, 3, 38 abysicola, 38, 39, 133 codicolum, 38, 39, 135 complanatum, 38 dasyoides, 38, 40, 42, 133 globuliferum, 38, 41, 137 kobayashii, 39 mexicana, 38 mexicanum, 41, 139 pinnatum, 38 polycarpum, 38 pusillum, 38 pygmaeum, 38, 42 rhizoideum, 38, 42, 135, 141 saccorhiza, 44 squarrosum, 39 tohyamanum, 39 vancouverianum, 39 venustissmum, 39, 133 Plumaria ramosa, 4 plumosa filicina, Ptilota, 75 plumula, Conferva, 19 plumulum, Antithamnion, 4, 5, 7, 119 plumulum, 5, 11, 1 crispum, Antithamnion, 4, 5, 7 Platythamnion, 5 plumulum, Antithamnion, 5, 11, 19 polycarpum, Pleonosporium, 38 Polycoryne gardneri, 92, 185 phycodricola, 92 Polyneura, 76, 92 latissima, 85, 187 Polyneurella, 76 hancockii hancockii, 85, 187 rhizoidea, 86, 181 Polysiphonia, 52 perpusilla, 82 porra, Pelagophycus, 21 Prionitis delicatula, 29 procumbens, Ceramium, 48, 63, 155, 157 5 profunda, Phycodrys, 87, 89, 181 prolongata, Grateloupia, 30, 63 prostrata, Haraldia, 92, 197 pseudocorticatum, Antithamnion, 12, OAM, UPI by pteroton, Antithamnion, 11 Ptilota, 2 californica concinna, 75 densa, 74 filicina, 75, 173 plumosa filicina, 75 pulchellum, Antithamnion, 12 pulchra, Phycodrys, 87 pusillum, Pleonosporium, 38 pygmaea, Schizoseris, 80, 177 pyzmaeum, Antithamnion, 11, 21, 119 Pleonosporium, 38, 42 quercifolia, Phycodrys, 88 radicosa, Phycodrys, 90 ramosa, Plumaria, 4 ramosissimum, Callithamnion, 25, 26, SpA, jb4z/ tea Ceramium, 48, 57, 63, retusum, Hypoglossum, 79, 177 reversum laxum, Platythamnion, 9 Platythamnion, 5, 8, 109 heteromorphum, 8, 9 rhizoidea, Polyneurella hancockii, 86, 181 rhizoideum, Pleonosporium, 38, 42, 135, 141 Rhodochorton amphiroae, 30 riggii, Phycodrys, 88 rigidum, Callithamnion, 26, 33, 127 rubrum, Ceramium, 47 pacificum, Ceramium, 61 rapieolum, Callithamnion, 26, 33, 35, 12 ruprechtiana, Cryptopleura, 98 saccorhiza, Pleonosporium, 44 Spermothamnion, 44 Tiffaniella, 44, 139 sarcodiae, Aglaothamnion, 36 Sargassum, 41, 78 palmeri, 14 Schizoseris, 76 pygmaea, 80, 177 scopulorum, Aglaothamnion. 36 scrippsiana, Antithamnion, 15, 16 secundatum, Antithamnion, 11, 22, 121 serpens, Ceramium, 49, 64, 157 setaceum, Antithamnion, 11, 22 setchellii, Phycodrys, 88, 89, 92, 197 shimamuranum, Antithamnion, 11 similans, Antithamnion, 14 simplex, Antithamnion breviramosus, 14, 117 Phycodrys, 87, 90, 183 simulans, Antithamnion, 12 sinicola, Ceramium, 47, 48, 157 sinicola, 64, 161 interruptum, Ceramium, 65, 161 johnstonii, Ceramium, 65 sinicola, Ceramium, 64, 161 sinuosa, Phycodrys, 88 snyderae attenuata, Spermothamnion, snyderae, Spermothamnion, 45 Spermothamnion, 44, 139 snyderae, 45 soccoriense, Callithamnion, 25, 26, 34, 9 Sorella, 76 delicatula, 83, 175 californica, 83 pinnata, 77, 84, 183, 187 sparsum, Antithamnion, 11 spathulata, Cryptopleura, 97 spatulata, Cryptopleura, 97, 100, 203 Membranoptera, 79, 177 spectabile, Nitophyllum, 95 spectabilis, Myriogramme, 94, 95, 199 Spermothamnion, 3, 44 saccorhiza, 44 snyderae, 44, 139 attenuata, 45 snyderae, 45 spirographidis, Antithamnion, 10 Spyridia, 2 filamentosa, 69, 167 squarrosum, Pleonosporium, 39 squarrulosum, Callithamnion, 25 subdichotoma, Myriogramme, 81 subuteotale, Antithamnion, 12, 22, 121 subulatum, Antithamnion, 13 sympodiale, Ceramium, 48 Taenioma, 76 clevelandii, 81 macrourum, 83 perpusillum, 82, 181, 201 taylorii, Ceramium, 48, 57, 65, 159 templetonii, Ceramium, 49, 55 tenerrimum, Ceramium, 49 tenuis, Griffithsia, 70, 73, 169 tenuissimum, Aglaothamnion, 36 Ceramium, 50 tepocensis, Platythamnion, 6, 7, 111 terminale, Antithamnion, 14 thouarsii, Antithamnion, 11 Tiffaniella, 3 saccorhiza, 44, 139 tohyamanum, Pleonosporium, 39 transversale, Ceramium, 57 tripinnatum, Aglaothamnion, 36 umbellata, Galaxaura, 18 uncinatum, Acrosorium, 94, 193 Antithamnion, 12 Callithamnion, 26, 35, 129 uncinatus, Fucus laceratus, 94 undalatum, Branchioglossum, 76, 173 vagabunde, Ceramium, 49, 66, 161 vancouverianum, Pleonosporium, 39 varispiralis, Callithamnion, 27 veleroae, Antithamnion, 13 Callithamnion, 31 venustissimum, Pleonosporium, 39, 133 villosum, Platythamnion, 5, 9, 113, 115 violacea, Cryptopleura, 97, 98, 101, 199 violaceum, Nitophyllum, 101 viscainoense, Ceramium, 47, 67, 161 washingtoniense, Ceramium, 47 woodil, Branchioglo um 11, O45 Laos 1] Delesseria, 77 yezoensis, Platythamnion, 5, 6 zacae, Ceramium, 50, 67, 159 Zostera, 72 REPORTS ON THE COLLECTIONS OBTAINED BY ALLAN HANCOCK PACIFIC EXPEDITIONS OFF THE COASTS OF SOUTHERN CALIFORNIA, MEXICO, CENTRAL AMERICA, SOUTH AMERICA, AND THE GALAPAGOS ISLANDS MARINE RED ALGAE OF PACIFIC: MEXICO PART 7 CERAMIALES: CERAMIACEAE, DELESSERIACEAE By E. YALE DAWSON r4 Tue UNIVERSITY OF SOUTHERN CALIFORNIA PUBLICATIONS ALLAN Hancock Paciric ExPEDITIONS VoLuME 26, NuMBER 1 IssuED SEPTEMBER 28, 1962 Price $4.25 Tue UNIVERSITY OF SOUTHERN CALIFORNIA PREsS Los ANGELEs, CALIFORNIA TABLE OF ‘CONTENTS PART 1 CERAMIACEAE GYMNOTHAMNION bed aoe PLATYTHAMNION ANTITHAMNION CROUANIA CALLITHAMNION AGLAOTHAMNION PLEONOSPORIUM HALOPLEGMA LEJOLISIA TIFFANIELLA SPERMOTHAMNION CERAMIUM CENTROCERAS SPYRIDIA GRIFFITHSIA MIcROCLADIA NEOPTILOTA PTILOTA POW cab Aa ea aes -1oe DELESSERIACEAE BRANCHIOGLOSSUMI Oe yeh: SP een HyPpocGLossuM MEMBRANOPTERA HoLtMEsIA SCHIZOSERIS PLATYSIPHONIA TAENIOMA SORELLA GRINNELLIA POLYNEURA POLYNEURELLA . NIENBURGIA PHycoprys POLYCORYNE HaARALDIA ANISOCLADELLA ERYTHROGLOSSUM ACROSORIUM MyrtoGRAMME CRYPTOPLEURA BotTrRyYOGLOSsUM LITERATURE CITED . soped eM Ta) abet cite ol iobaot el tat cll as eS) ee eee eel ieee ie (oe) an st ane ce ie a ee ieee Si itey. Pe Wille Cay het ised aa i a “inaih Ea eit cyt. ky Op MEY ae Liebe ean athe ii one t a | a 7 ann i hans ern, ety ae ihe, if pitt 7. eae me F ie, Ni hie an ee BS gat vny bid i He ae Si cen Ay wa NN, wh hee) pa tear ear wi ae ar mt! i 2) t x ! yf) { MW Faye” 4 iV, A é re ie hw ay 4 4 ne 4 f 1 eh | “ f <" = | ‘ ‘oh ’ ee "i ’ pi WL; ~ é,. i f } ( 4 i i” ‘ \ i n. ea . Pe if te a” i Ge i iT } * j ; 4 ; i 4 MARINE RED ALGAE OF PACIFIC MEXICO PART 7/ CERAMIALES: CERAMIACEAE, DELESSERIACEAE? By E. YALE Dawson The following is a continuation of the studies of Pacific Mexican Red Algae of which parts 1 and 2 have appeared in the Allan Hancock Pacific Expeditions, vol. 17 (Dawson 1953, 1954), parts 3, 4 and 5 in Pacific Naturalist, vol. 2 (Dawson 1960, 1961; Hollenberg 1961) and part 6 in Nova Hedwigia (Dawson 1962, in press). The general features and some of the ecological relationships of the marine flora of Pacific Mexico have been presented elsewhere (Dawson 1944, 1949, 1951, 1959, 196la, etc.) and a comprehensive annotated list of the species until recently recorded in the flora is also available (Dawson 1954a). A more recent summary of distributions is included in Dawson 1961b. The specimens reported here represent the results of some twenty years of collecting, mostly on expeditions of the Hancock Foundation. It will be seen that the Mexican coasts north of latitude 23° have been moderately well covered. Collections from the more southern coasts remain spotty. Unless otherwise indicated, representative examples of the collec- tions are deposited in the Herbarium of the Allan Hancock Foundation in Los Angeles, and (or) in the Herbarium of the Beaudette Foundation now on loan at the Hancock Foundation. Partial sets have been distributed to the University of California, Berkeley; the Rijksher- barium, Leiden; University College, Auckland; University of Washing- ton, Seattle; Rutgers University, New Brunswick; University of British Columbia, Vancouver; and others. Distribution records are given in the text from north to south for the sake of consistency, the Gulf of California following Pacific Baja California. All collections cited by number with the prefix “D.” are in accord with the field notebooks of E. Yale Dawson. The dates of collection are as follows: 01-40 to 902-40, Jan., July 1940; 16-1094, Jan.-Feb. 1946; *This study was supported in part by a grant from the National Science Foundation, NSF G-15074, to the Beaudette Foundation for Biological Research, and in part by the generosity of Mr. Palmer T. Beaudette. [1] 2 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 1095-1645, Apr. 1946; 1646-1989, May 1946; 2005-2165, June 1946; 2498a-2673 (W. Williams) Apr.-May 1946; 2756-3145, Oct. 1946; 3146-3581, Nov. 1946; 3582-3764, Dec. 1946; 3765-3940, Jan.-Feb. 1947; 3942-3976, 3982-4040, 4099-4113 (C. L. Hubbs & E. Flynn) Aug. 1946; 4041-4098, 4114-4162 (C. L. Hubbs) Dec. 1946; 5143-5312, Sept. 1948; 6462-7278, 7795-7810 Mar. 1949; 8124-8917, Dec. 1949- Jan. 1950; 9044-9554, Apr.-May 1950; 9624-10095, Apr. 1951; 10279- 10288, Aug. 1951; 10289-10589, Oct.-Nov. 1951; 10672-10691, Dec. 1951; 10742-11040, May-June 1952; 12036-12176, Nov. 1953; 12239- 12247, Apr. 1954; 12248-12542, Jan.-Feb. 1954; 13228-13606, Apr. 1955; 18545-18988, Apr. 1958 (first set in Herb. Los Angeles County Museum); 19191-19200 (K. Norris) Sept. 1952; 19201-19224 (K. Norris) Mar.-Apr. 1952; 19225-19286 (C. L. Hubbs) Oct.-Dec. 1957; 19287-19306 (C. L. Hubbs) Nov. 1954; 20154-20632, 20804-20949 (M. Neushul) Aug. 1957; 20991-21500, Apr. 1959; 21501-21536 (E. S. Reese) Aug. 1959; 21686-21753, Nov. 1960. The photographs are the work of Don Ollis of Santa Barbara. The Latin diagnoses were kindly prepared by Dr. Hannah Croasdale. Thanks are also due to Miss Florence Ralph and Dr. Clinton Dawes for assistance in the research. Ceramiaceae Key to the Genera in the Pacific Mexican Flora 1. Thallus consisting of spongy, flabellate blades ........ Haloplegma 1. Thallus not spongy, without definitive blades ...........:cceeeees 2 2. Final orders of branches or all branches uncorticated ........ 8 2. Final orders of branches incompletely or completely corti- CALE Sdsccadscecavsstaes sonstiasescsshs isco oak asekesteet acute teak wotee. cree ceueecemmeneees 3 3. Cortication of branches differentiated into nodes and internodes 4 3. Cortication homogeneous from base to apex of branch ............ 6 4. Corticating cells rectangular and in vertical rows ..........++ Ba Sg Rea oleae isa tinceatesRattn Sac cares eee ean desea eae as ome Centroceras 4. Corticating cells polygonal and irregularly arranged ........ 5 5. All axes and branches corticated similarly .. Ceramium (in part) 5. Main axes fully corticated; ultimate branchlets corticated only iy pas se cerscs estes saanesescanserencertecticssUeceneuceacessonmectasnareees Spyridia 6. Branching. distichous: -.ccst.cs.ssctecsseascvasseonassscrsenaceeaaes: -e=czeereeat es fs 6. Branching mot saistichousit:...scc:t.screes Ceramium (in part) 7. Branching opposite and the two opposite branches unlike ............ 8 %.. Branching alternate or pectimate: ..c.v.1c.csccsvesaccene-ceese< Microcladia 8. Leaf-like branchlets smooth on one or both sides, of limited erowth, not growing out into branches ............+++ Neoptilota 8. Leaf-like branchlets serrate on both sides, not necessarily of limited growth, often growing out into branches .... Ptilota no. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 3 oe Branching-opposite ‘or “verticillate: v.01. ica. ccckiesedevcsenstevteesterseasa 10 9: Branching ‘not opposite: or verticillate: ©. :..21....0ccscc:scsecccessecteoeaees 14 10. Branching opposite, or, if verticillate, with all branches of a verticil of about the same length ............:.csscesc-scsseesseoses 11 10. Branching verticillate, each verticil with two long and two SOM UD TATICHES si isntsccsateacteccureestaseenceateotonsasete Platythamnion UES ECAC INIG OPP OSILE 650 cascsccocenecosneck cvosshens as sccesteavdeeodseatecceumeeotaneee: 12 Mee rameline “Vertecilate siic....46)-tecoctssvasesencpals Wuecesccuceseusenvetreesaenceers 13 12 Tetrasporangia terminal on ordinary lateral branchlets Be Ree sentra Sucadu acct veasseisbenetccsesceconss Gymnothamnion 12. Tetrasporangia abaxial or adaxial on branches or branch- | ce) ca ea ee a eRe Antithamnion (in part) 13. Thallus mucilaginous, the lateral branchlets compactly arranged to form a cylindrical axis ...............00. Crouania 13. Thallus not mucilaginous, the lateral branchlets loose, not forming a definitive cylindrical axis .. Antithamnion (in part) ry Branchine reeularly alternate: -..:3--::¢.cs-asccssotsacsedecece eee ee 15 14. Branching not regularly alternate ..............:..:.c:scescssseseces 17 15. Tetrasporophytes with tetrasporangia ...........csccccccsscecceecsees 16 15. Tetrasporophytes with polysporangia ............ Pleonosporium 16. Gonimoblast formed of + spherical or rounded gonimo- lobes: cells, plurinucleate: ..5.4:.0.:.3-7-0--0s2--ns ass aebuotsdcesies dansk vic eaaaees saa seues 3 2. Longer pairs of lateral branchlets bearing 1, 2, or 3 branches COUN CACHY COM oe cateasavoxadenviletchadejatenasuatestsnstousateramtuetarsestecesare 4 3. Quadrately arranged subultimate branchlets of younger parts + symmetrical from each cell, the upper and lower pair of about SORIA SY Za 08 oot as ten ot tos dsvondcniscnde P. heteromorphum J. Ag. 3. Quadrately arranged subultimate branchlets of younger parts asymmetrical, the lower of each vertical pair much longer than ER EMPEY io stcssocns.Plants “under: 2; cme. hight <...22 hoe eer eee eee Peeters sane oec trees eteeercees P. pygmaeum (but see P. dasyoides) A? Biants Aston com gbieh 2: ctgesse oeeuet tencat ee coacceeeee ce eee eee 5. Polysporangia sessile; plants lightly corticated below ................ xe sxsactnesivaevasunatens? soca scetsvatspasaettae vaste eactstaneneets P. complanatum Tayl. 5. Polysporangia pedicellate; cortication usually heavy except near branch hips) s: accra screenees oe P. dasyoides (P. pygmaeum appears to be a dwarfish, little-corticated variant of this) 6. Thalli radially branched ................ P. globuliferum Levring 6: Phallivdistichously; branched .).2 222.02... eee ee 7. Cells of main axes only about as long as wide .............s.0ssssesses wisdapiiasubiesUosueenassvetsctesesnenecsdesannesees P. pinnatum Okamura & Segawa 7. Cells of main axes mostly 1.5 to 4 diameters long .............:...00000 8. Determinate branches from principal axes usually simple .... 8. Determinate branches from principal axes usually with 1 or more orders: of foranchletsiget ts seasctscerets- cocoa eee 9. Plants 5 mm. high or less; polysporangia with about 12 spores sate sada ea tes cy seal Ree EMEA eel es Saw P. pusillum Yamada 9. Plants 2.5-5 cm. high; polysporangia with about 32 spores ........ 10. Lower parts loosely clothed with rhizoids; polysporangia grouped, not seriate, borne on short branchlets in special fertilenareas: Cte eek ee P. rhizoideum sp. nov. 10. Lower parts not especially clothed with rhizoides; poly- sporangia seriate, sessile and adaxial on ordinary deter- minate lateral branchlets ................ P. mexicana sp. nov. 11. Lateral branches usually bearing an abaxial branchlet from the kbasalimost« cell sticks toate tesees bese ocean ee 11. Lateral branches usually with lowermost cell lacking a branchlet and the first branchlet arising adaxially from the second: cells 2.s5.uscsa sects ctsteeesneate eosde veeach eacaeeee eee ie ee Oe 12. Plants + densely branched in 4-5 orders; polysporangia and spermatangia unknown ............ P. abysicola Gardner 12. Plants + openly branched in mostly 3 orders ................ 10 12 14 No. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 39 13. Polysporangia oviform; spermatangia secund ......... cece Lees anspor ceasteseubecavizenvsteseesecccosvscssnadeedcasareatearye P. squarrosum Kylin 13. Polysporangia ellipsoidal; spermatangia alternate .................... BAe tarate tau hoea hneeatioch ob cSaneesdusutfesvaacte P. vancouverianum J. Ag. 14. Polysporangia sessile and usually adaxially secund ........ Gre ceanetadeiesnaasoceatesdenveres P. tohyamanum Tokida & Inaba’ 14. Polysporangia pedicellate, in groups, not secund ........ Boe da su antis stulcutsceltwel ce nawasvnasceveevavete saronsiess P. kobayashii Okamura Pleonosporium abysicola Gard. PL. 13, fig. 3 Gardner 1927a, p. 380, pl. 81, fig. 1, pl. 82. Thalli 15-18 mm. high, with 1 or a few percurrent, uncorticated axes 200-235 pu in diam. at the base, with 5 orders of branches, each decidely smaller than the preceding, all branches and ramuli distichous and alternate, arising from every cell, successively reduced but not attenuated, the tips blunt; cells of primary axes and major branches (1.5) 2.5-3.0 diameters long, those in the ultimate ramuli 1-2 diameters long, the basal cells of all orders of branches much shorter than the others, each giving rise to the first branch of the next order on the abaxial side; ultimate branchlets of 2-6 cells; polysporangia elliptical, 80-90 » long, usually 2, sessile and alternate on the subultimate branchlets; spermatangia unknown (modified from Gardner). Type: N. L. Gardner 6010, July, in Herb. University of Cali- fornia, Berkeley (296614). Type LocaLity: Dredged from 15-20 fms. near Friday Harbor, Washington. MEXICAN DISTRIBUTION: Pacific Baja Calif—D. 8024, Tanner Bank (70 m.); D. 8452, Isla Guadalupe (90 m.) ; D. 9034, Sacramento Reef (57 m.) ; D. 9323, Isla Magdalena, drift. This species has been reported heretofore only as the type. Despite the fact that it was described in the absence of polysporangia and the type was described as having much longer axial cells, we attribute these more ample Mexican specimens to this species and have modified Gardner’s description. Study of Gardner’s type figures reveals that the cells of the principal axes and of the primary branches are for the most part 2.5-3.0 diameters long, although he describes them as 3-4 and 4-6 diameters long, respectively. Pleonosporium codicolum sp. nov. Pl. 14, fig. 4-5 *Reexamination of a part of the type of P. venustissimum (Mont.) DeToni has shown that Kiitzing’s figure was inaccurately drawn and that the branching characters of this species are essentially like those of P. tohyamanum, although the longer axial cells of the former and other features may ultimately be found to distinguish them. (Plate 13, fig. 4) See also Howe, 1914, p. 150. AO ALLAN Hancock Pactric ExpEDITIONS VOL. 26 Thalli partim endophytici, e filamentis profunde inclusis, cellulis 30 4 diam., 100-150 yw long. constantes; filamenta imter utriculos Codii remote alterne ramosa, ad superficiam filamenta 500-800 » long. libera brevia erecta ramosa producentia; filamenta libera irregulariter semel vel bis alterne aut subdichotome ramosa, non in eodem plano, e cellulis plerumque 1.0-1.5 plo longioribus quam latae composita, haud attenuata, cacuminibus obtusis; polysporangia subspherica aut ovata, ad 100 uw long., 12-18 sporas habentia, reproductio sexualis non visa. Thalli partly endophytic, consisting of deeply embedded filaments, with cells 30 » in diam., 100-150 » long, ramifying between Codium utricles, remotely alternately branched, at the surface producing short, erect, branched, free filaments 500-800 ». long; free filaments irregularly once or twice alternate or subdichotomous, not in one plane, of cells mostly 1.0-1.5 diameters long, not at all attenuated, the tips blunt; polysporangia subspherical or ovoid, to 100 » long, with 12-18 spores; sexual reproduction not seen. Type: Holotype is E. Y. Dawson 8318, December 18, 1949, in Herb. A. Hancock Foundation; an isotype slide is in Herb. Beaudette Foundation. TYPE LOCALITY: Endophytic in Codium fragile, intertidal, extreme south tip of Isla Guadalupe, Baja California, Mexico. Pleonosporium dasyoides (J. Ag.) G. DeToni Pl. 13, fig. 1-2 G. DeToni, 1903, p. 1310; Kylin, 1941, p. 28; Dawson, 1946c, p. 83; Callithamnion dasyoides J. G. Agardh, 1876, p. 31. Thalli 5-10 cm. tall, usually epiphytic (sometimes on hydroids, etc.) , alternately more or less distichously branched, the upper main branches from the primary axis often longer than the lower ones; primary axes and branches of first and second orders corticated by slender, branched, descending rhizoidal filaments from the basal cell of lateral branches; primary axes 300 » in diam. or more, to 1 mm. near the base; ultimate indeterminate branchlets of 11-16 cells about as long as broad, about 40 » in diam. at the base, somewhat tapered, more or less adaxially curved, terminally blunt; polysporangia terminal on simple or compound branchlets of 1-several cells from near the base (adaxial, sometimes also abaxial) of determinate laterals, elliptical, about 65-75 pu long; spermatangia forming a terminal subcylindrical or subconical compact cluster on ultimate branchlets, the sterile base of 1-3 cells. Type: Not specifically designated, represented by at least 2 specimens in Agardh Herbarium, Lund, Sweden. Type Locatity: Not specifically designated, indicated as “Chile” and “California.” The type of the California plant is represented by a specimen marked Callithamnion dasyoides B californicum without definite locality. MEXICAN DISTRIBUTION: Pacific Baja Calif—D. 173-45, Punta no. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 41 Descanso; D. 68, D. 5179, D. 6482, D. 6483, Cabo Colnett (intertidal) ; D. 8915, Punta Baja (intertidal) ; D. 9765 Bahia Blanca (18-30 m.). Pleonosporium globuliferum Levr. Pl. 15, fig. 2-6 Levring 1941, p. 647, fig. 19; Dawson 1960, p. 50 Thalli 6-7 mm. high (epiphytic, often on Codium), attached by a eroup of branched, multicellular, penetrating rhizoids, tufted, consisting of several erect, multifariously branched axes; primary axes uncorti- cated, 70-110 » in diam. of cells 1.0-1.5 diameters long near the base, longer (to 4 diameters) above; branching multifarious throughout, the determinate lateral branches 1 mm. long or more, ascending and somewhat incurved, about 30 » in diam. at the base, of cells 3-4 diameters long, tapering to about 12 w in diam., the tips blunt; polysporangia sessile, subspherical, scattered along lateral branches, mainly adaxial, about 40 » in diam.; spermatangial clusters subcylindri- cal, about 80 pu long, 30 » in diam., sessile along adaxial side of lateral branchlets. Type: A collection by Carl Skottsberg, 14 March, 1917, in the Herbarium of the Botanical Garden, Goteborg, Sweden. TYPE LOCALITY: “ausserhalb Sanchez, Masafuera” Island, Islas Juan Fernandez, Chile. Mexican Distribution: Pacific Baja Calif—D. 8521 (on Codium, © intertidal, D. 8237 (on Sargassum, 6-29 m.), Isla Guadalupe. South- eastern Baja Calif—D. 3093, Cabo Pulmo, on Sargassum. Oaxaca— D. 21433, Puerto Guatulco. Pleonosporium mexicanum sp. nov. Pl. 16, fig. 1 Thalli 2-5 cm. alt., fruticosi, abunde ramosi, constantes ex axibus multis e basi per rhizoidea affixa orientibus; axes ecorticati 120-200 » diam., sursum gra- datim reducti, cellulis longitudine variantibus, saepe in partibus infimis aeque longis ac latis, in partibus mediis 2-4 plo longioribus quam latae, supra breviores rursus (c. 1.5 plo longioribus quam latae); alterni distichi, non ex omni cellula orientes; rami primarii plerumque sine ramis in partibus inferioribus mediisque, supra ramulis lateralibus distichis alternis determinatisque ex omni cellula praediti; ramuli determinati laterales plerumque simplices, e 15-30 cellulis compositi, valde incurvati satis corymbosi ad basim 40-70 yu diam., e cellulis 1-2 plo longiorbus quam latae compositi, ad cacumen obtusum gradatim reducti, (non, autem, attenuati, cellula basali paulo breviore quam aliae: poly- sporangia seriata sessilia, in ramulis lateralibus determinatis adaxilalia, late ovata, cum involucro crasso c. 90 mw diam., c. 32 sporas habentia; reproductio sexualis non visa. Thalli 2-5 cm. tall, bushy, abundantly branched, consisting of num- erous axes from a rhizoidially attached base; axes ecorticate, 120-200 in diam., gradually reduced upwards, the cells of variable length, often 1 diam. long in lowermost parts and to 2-4 diameters long in mid-parts 42 ALLAN Hancock Pactric ExPEDITIONS VOL. 26 shorter again (about 1.5 diameters) above; branching alternate, distich- ous, not from every cell; primary branches commonly barren of branches in lower and mid-parts, provided with distichous, alternate determinate lateral branchlets from each cell above; determinate lateral branchlets usually simple, of 15-30 cells, strongly incurved, somewhat corymbose, 40-70 « in diam. at the base, of cells 1-2 diameters long, gradually reduced (but not attenuated) to a blunt tip, the basal cell only a little shorter than the others; polysporangia seriate, sessile, adaxial on the determinate laterals, broadly ovoid, about 90 » in diam. including the thick envelope, with about 32 spores; sexual reproduction not seen. Type: Hollotype is E. Y. Dawson 3610, Dec. 8, 1946, in Herb. Beaudette Foundation. Type Locatity: Lowermost intertidal on small reef 3 km. north of Belmar Hotel (Playa de Olas Atlas), Mazatlan, Sinaloa, Mexico. ADDITIONAL MATERIAL: Pacific Baja Calif—D. 8450, Isla Guadalupe (not corymbose and the branchlets little incurved, but other- wise similar). Gulf of Calif—bD. 85la, Isla Jorge; D. 789, Isla Patos; D. 1004, Isla Partida; D. 680, Puerto Libertad; D. 21691, 21705, Bahia Bocochibampo, near Guaymas. Sinaloa—D. 3591, D. 3657, D. 3666, D. 3632, D. 10834, Mazatlan. Nayarit—D. 10860, 10861, 10875, Mira Mar. The long, usually simple, strongly incurved and + corymbose determinate branchlets are distinctive in this species as is also the barren condition of the lower parts of the primary branches from the principal axes. Pleonosporium pygmaeum Gard. Gardner 1927a, p. 379, pl. 79, fig. 2, pl. 80. This appears to be a dwarfish, little-corticated variant of Pleono- sporium dasyoides and may ultimately be reduced. It is recognized by its smaller stature (6-20 mm.) and the restriction of corticating filaments to the very base. A single collection available to me (D. 8010 from 30-38 m. at Cortes Bank) agrees with Gardner’s description but does not lend credence to specific recognition. Pleonosporium rhizoideum sp. nov. Ply 14) figs 1-3 Pl d7) hig a7 Thalli penicillatim ramosi, ad 2.5 cm. alt., constantes ex axibus multis ramosis erectis, e massa conferta coacta rhizoiderorum adhaerentium formantium, orientibus; axes erecti ad basim 125-170 pw diam., in partibus inferioribus per rhizoidea implicata plus minusve laxe vestiti, e cellulis (1) 1.5-2.0 plo longiori- bus quam latae, admodum distiche ramosis compositi, rami magna ex parte sim- plices longissimi, primum valde incurvati deinde irregulariter curvati recurva- tive, paululum imbricati (interdum extrema in parte uncinati) 60-70 » diam., paulum attenuati, cacuminibus acutius reductis sed obtusis, ad formandum rhizoideum interdum productis; polysporangia in partibus thalli propriis dense ramosis nata, ramis brevibus irregularibus, polysporangia aggregata alterna sessilia spherica, c. 60 yw diam., 32 sporas continentia, ferentibus; No. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 43 cqstocarpi subspherici c. 90 » diam., aliquot lobos humiles irregulares habentes, in partibus thalli fertilibus ramossissimis, partibus sporangialibus similibus nati. Thalli tufted, to 2.5 cm. tall, consisting of many erect, branched axes from a dense mass of rhizoids forming a felted attachment; erect axes 125-170 pw in diam. at the base, more or less loosely clothed in lower parts by entangled rhizoids, of cells (1)-1.5-2.0 diameters long, essentially distichously branched, the branches mostly simple, very long, at first strongly incurved, then irregularly curved or recurved, somewhat entangled (sometimes terminally uncinate) 60-70 ,« in diam., little attenuated, the tips rather sharply reduced but blunt, sometimes pro- longed to form a rhizoid; polysporangia borne in special, densely branched parts of thallus, the branches short, irregular, bearing groups of alternate, sessile, spherical polysporangia about 60 » in diam., containing 32 (?) spores; cystocarps subspherical, about 90 in diam., with several low, irregular lobes, borne in densely branched fertile parts of thallus similar to sporangial ones. Type: Holotype is E. Y. Dawson 3774, Jan. 9, 1947, in Herb. Beaudette Foundation. TYPE LOCALITY: Salina Cruz, Oaxaca, Mexico. ADDITIONAL MATERIAL: D. 3783, D. 3814a, Salina Cruz, Oaxaca. Haloplegma mexicanum Tay]. Taylor 1945, p. 262, pl. 86, fig. 1. Plants to 10 ecm. tall, tufted, rose-pink above, discolored below, flabellately expanded, the branching irregularly alternate from the margin, the branches crenate to irregularly pinnately lobed or again branched, spongy throughout, above very thin and delicate, but below thicker; internally consisting of branched, uniseriate, longitudinal filaments supporting a network of filaments in quadrilateral mashes which at the surface of the plant bear groups of erect, sharp-tipped, free, alternately branched filaments 7-8 cells in length, the cells 1-2 diameters long, 25-35 ». in diam. (from Taylor). Type: Taylor 39-644, May 9, 1939, in Herb. A. Hancock Foundation. Type LocaLity: Dredged from a bottom of coralline and other algae at Hancock Station 970, Isla Maria Magdalena, Islas Tres Marias, Mexico. Lejolisia colombiana Tay]. Pl. 17, fig. 1-5 Taylor 1945, p. 265, pl. 4, fig. 3-10 Thalli small, tufted, the basal filaments creeping, to 24 » in diam., the branches chiefly erect, to 3-5 mm. tall, little tapered, about 18 in diam., the cells about 100 p» long below, 70 » long above, simple 4A, ALLAN Hancock Paciric EXPEDITIONS VOL. 26 or sparingly branched, the branches erect, the apical cells long, obtuse; sporangia unilateral on the erect branches, on 1-2-celled, upcurved pedicels, tetrahedral, oval, about 28 ». in diam., 42 » long; spermatangia in clusters terminating the erect axes or lateral branchlets, the clusters cylindric-oval, (80) 100-115 u long, 35 » in diam.; cystocarps terminal on the erect branches or few-celled lateral branchlets, the pericarp-like investment turbinate, to 175 p» in diam., 150 p» long (to 138 pw long, 110 p. wide in Mexican specimens). (modified after Taylor). Type: Taylor 34-495B p.p., Feb. 12, 1934, in Herb. A. Hancock Foundation. TyPE Locality: Forming tufts, Isla Gorgona, Valle, Colombia. MEXICAN DISTRIBUTION: Baja Calif—D. 332lb, Cabeza Ballena; D. 3239, 3265, Punta Palmilla; D. 3106, Cabo Pulmo. Tiffaniella saccorhiza (S. & G.) Doty & Mefiez P. 16, fig. 2 Doty & Mefiez 1960, p. 135-144, fig. 1-4. Spermothamnion saccorhiza (Setchell & Gardner) Feldmann-Mazoyer 1942, p. 16. Pleonosporium saccorhiza Setchell & Gardner 1930, p. 168. Thalli monosiphonous, uncorticated, consisting of an extensive, branched, creeping portion attached to the host by numerous penetrating rhizoids from below, and of erect axes arising from the creeping portion; erect parts 2-3 mm. high, subdichotomously branched, 26-30 » in diam. at the base, tapering but very slightly to the blunt apices; cells 8-12 diameters long; rhizoids prolonged, pink colored, consisting of single cells 300-500 » long, very much swollen in the middle, terminating in an irregularly saccate swelling; polysporangia sparse, 2-3 arising on short branches in the lower and upper parts of the plant, spherical to slightly elongated, on l-celled pedicels, 75-85 jm in diam., with approximately 32 spores and with thick walls; spermatangia borne on solitary, terminal stichidia from the lower parts of erect systems; carpogonial branches subterminal, the gonimoblast without a conspicuous central fusion cell. Type: H. L. Mason 37, April, in Herb. California Academy of Sciences (173630). TYPE LOCALITY: Growing on Codium sp., Isla Guadalupe, Baja Calif., Mexico. MEXICAN DISTRIBUTION: Pacific Baja Calif—D. 10040 (on Codium fragile, D. 10292 (on C. hubbsii, “Velero Point” about 10 mi. west of Punta Malarrimo. This segregate from Spermothamnion shows many resemblances to S. snyderae, and the basis of generic distinction has not yet been well tested. no. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 45 Spermothamnion snyderae Farl. var. snyderae Pl. 16, fig. 3-5 Farlow 1899, p. 74; Dawson 1945, p. 67; Dawson 1949, p. 220; Dawson 1950, p. 155, fig. 24-25; Dawson 1951, p. 53; Dawson, Neushul & Wildman 1960, p. 80, pl. 36, fig. 1-2. Thalli 1-3 (5) em. tall, consisting of erect, finely hair-like filaments from prostrate filaments attached by rhizoids with discoid ends; erect filaments rather sparsely, mostly unilaterally branched, seldom with more than 3 orders, 50-110 » in diam., of cells mostly 5-7 (10) diameters long; branches of successive orders of approximately the same breadth, the ultimate ones about 0.7 times the diameter of basal ones; cystocarps without an involucre, forming a loose terminal cluster 350 » in diam.; tetrasporophytes with polysporangia only, these borne terminally on short, simple or compound branchlets in lower and middle parts of erect filaments; polysporangia broadly ellipsoidal, 95-130 « long, 75-120 pw in diam., with 8-32 (usually 12-16) polyspores; spermatangia forming cylindrical, compact, sessile heads about 150 pw long, 50 p» in diam. arranged in short adaxial series on 5-7-celled, incurved, fertile branchlets in middle and upper parts of plants. Type: Not specifically designated, represented by collections of Mrs. Snyder, Mrs. Bingham, Mr. Cleveland, in the Farlow Herbarium of Harvard University. Type LocaLity: Not specifically designated: “Santa Cruz, Santa’ Barbara, San Diego, Calif.” MEXICAN DISTRIBUTION: Pacific Baja Calif — D. 242, 279, Cooper 823, near Punta Descanso; D. 101, Cabo Colnett; D. 8890, Punta Baja; Williams 5/24/46, Isla San Martin; D. 10550, Punta Norte, Isla Cedros; D. 2847, near Punta Santa Rosalia; D. 13351, Punta Thurloe; D. 9538, Punta Abreojos; D. 9213, 9173, Bahia Asuncion; D. 13291, Isla Margarita. Gulf of Calif—bD. 852, Isla Jorge; D. 759, Isla Patos; D. 717, Puerto Libertad; D. 610, Ensenada de San Francisco. The Gulf of California specimens are generally smaller and more delicate than those from the outer coast and have usually solitary, pedicellate polysporangia rather than groups of two to six, but inter- mediate conditions have been observed along southern Pacific Baja California which indicate that the range of the species extends into the cooler, northern Gulf of California and includes these more delicate forms. In that region the plant seems to be a winter annual, for, from Guaymas to Isla Jorge, it has been found only in February. Spermothamnion snyderae var. attenuata var. nov. Varietas speciei similis sed tenuior, 1 cm. alt., axibus infra 50-80 uw diam., supra ad 15-12 yw diam. attenuatissimis factis. Like the species but more delicate, 1 cm, high, the axes 50-80 pw in diameter below and becoming remarkably attenuated to 15-12 mw in diameter above. 46 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL, 26 Type: Holotype is E. Y. Dawson 8587, Dec. 20, 1949, in Herb. A. Hancock Foundation. TYPE LOCALITY: Intertidal at —1.7 foot tide level, 2.5 miles north of South Bluff, Isla Guadalupe. ADDITIONAL MATERIAL: D. 8227, dredged, 6-20 m., South Anchorage, Isla Guadalupe. Working Key to the North Pacific Species of Ceramium 1. Thallus completely corticated throughout ..........scsseeees 2 1. Thallus with nodal cortication for the most part continuous, but at least in some part with ecorticate internodal spaces, or the cortex thin and loose over internodes ..........:ccceseseeseneeseees 13 1. Thallus with cortication only at the nodes, or with uninter- rupted cortication only in older, lower parts or on reproductive Brameliesy Aish cei once ee acct saa tartan cae Ree Mca rs nce sues ceneamnenereres 14 2. Thallus bearing deciduous or persistent spines on apices or on short lateral brarmclies))=.--sccsts:ccccee-cseaeanstoneeesanacceeres 3 Doni sppmmmes | alosenbytssss.utasasse ese sp ese tense eta ce cease thers sanneeenaceeneteenetoans 4 3. Sharp unicellular spines present at apices or terminating short Jatteral:toranchlets, te.ss.c.ssecettourenteseroastores C. horridum S. & G. 3. Two or more multicellular spines terminating mature apices Oni maw Grelateral DraMChes: 2:0. :c-crnsnacoanescesor) scesteseesnat onenenaeaswertas vaste cbetiecelsorocmeadcenactont C. pacificum (Collins) Kylin (in part) 4. Plants bearing conspicuous sickle-shaped swollen branch- Vets ee casieee ty nue ts acnostten tee eer tacetcraavee Sena ss oes C. hypnaeoides (J.Ag) Okam. (Campylaephora hypnaeoides J. Ag.) 4. Plants without sickle-shaped branchlets ..........cccsesseseeseees 5 5. Cortical cells, at least for the greater part, in distinct longitu- dinal rows; with gland cells in the nodal cortex ..........:00 AN DU Dhaest A Ae OR OE C. eatonianum (Farl.) DeToni 5. Cortical cells not in distinct longitudinal rows; gland cells AUDSEME cSessteres cave sutese sate n ee bacvatetesasaeerustess ceecesdstase sesccbacestereretye enact 6 6. Plants large (10-15 cm.) with special whorls of fertile PamMula,. WElLOWA gies ccd ccntecponee daneuhan lattes C. boydenii Gepp 6. Plants smaller, without special whorls of fertile ramuli ...... 7 7. Plants with penetrating, bulb-tipped, pigmented rhizoids ........ Ba durtenmobostoneeuestecsetececsal tak hoe ne eee C. codicola J. Ag. 7. Plants. without bulbous, rhizoids<....:::.0:.00--.ccsecssscssczaesrnarpecsteaces= 8 8. Plants robust, the cortex 200 p thick or more ...........0 9 8. Plants not especially robust; cortex much thinner ........ 10 9. “Plants. creepinigg aio. citac eseeereeseeccese oes C. obesum Dawson 0.) Plants cerects(epiphay tic! fcr) stueerstoesseeeceerees C. crassum Okam. Sitvshodateonteteneeesys (Campylaephora crassa (Okam.) Nakamura) NO. 11. ius 13. 13. 15. 15. A. LT. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 10. Branching sparse; nodes not evident ...........ccsssseccseess Foe eee Py CeO She wet ne, ee C. howellii S. & G. 10. Branching more or less abundant; nodes evident ........ Apices more or less incurved; with many proliferous branches, but these not congested in upper Parts .........csesseccesesreseeeeres SOE Satie stawcebecgesses C. pacificum (Collins) Kylin (in part) (Note that C. kondoi Yendo em. Nakam. keys out here and is distinct from both C. pacificum and C. rubrum (Huds.) Ag.) NSEC ESe SEVEN Eth = seers skucctesdeavacict oicoes 00 GD ve AG Qa, i % 0 Qt ay) he ned (9 Q ONY ~ ag Onn’ Oo) 6 ont on Pag 0 éo, , ae 148 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 21 (all after Setchell & Gardner) Fig. 1. Ceramium howellii S. & G. A small lower part of an axis with a tetrasporangial branchlet, < 100. Fig. 2-3. Ceramium gracillimum var. byssoideum (Harv.) Feldm.-Maz. Fig. 2, Two mature tetrasporangial nodes, < 165; Fig. 3, A sterile axis, 1165: Fig. 4-5. Ceramium evermannii S. & G. Parts of sterile and tetrasporangial axis, respectively, < 82. no. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PLS 2k 150 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 RIGAGEE 22 Fig. 1. Ceramium howellii S. & G. Outline of upper part of a plant to show sparse branching and incurved tips, 16. Fig. 2-4. Ceramium hamatispinum Daws. Fig. 2, A single multicellular spine, < 550; Fig. 3, Outline of apical part of a filament, < 85; Fig. 4, Part of an old filament to show persistent, whorled spines, < 100. Fig. 5-6. Ceramium obesum Daws. Fig. 5, A plant from the type collection showing coarse, forcipate tips and rhizoids, * 5; Fig. 6, Longitudinal section through a main axis to show thick cortex, X 55. No. | DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Pb, 2 “Wop doo vnCODeNO0—~ ED yor yy TL Wea Aan Decree douangeegsgo tenn sen aging cnn sscneboeegonngnicesnsonayreageg? g Ober iran, QE OO YOO. Bis © °o S ot 5 sf 29009000 050 1G ; Ol ae eae AAO CREO Qo affe their obacouiioeat tape constgaaeitebs Mabicdan °° 09, dredetepooosnvodtedel Fig. Fig. Fig. Fig. ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE, 23 Ceramium mazatlanense Daws. Fig. 1, A young tetrasporangial plant with abaxial sporangia, X 100; Fig. 2, Sterile nodes, 200. Ceramium pacificum (Collins) Kylin. A young sterile node, X 190. Ceramium horridum S. & G. Upper part of a plant (* 36) and two apices to show spines (X 100) (after S. & G.). Ceramium paniculatum Okam. (after Okamura) Fig. 5, Apex to show multicellular spines, * 120; Fig. 6, A tetrasporangial node, 175; Fig. 7, Part of a cystocarpic plant, X 64. DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Pie 154 Fig. Fig. Fig. Fig. 5 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PEATE 24: Ceramium pacificum (Collins) Kylin. Habit, &* 0.425 (after Smith). Ceramium ornatum S. & G. Part of a tetrasporangial filament from the type collection, >< 100. Ceramium procumbens S. & G. Fig. 3, a tetrasporangial branch, 75; Fig. 4, Part of a sterile filament, X 155. Ceramium recticorticum Daws. Portions of filaments near the base and near the apex, respectively, 210. PL. 24 MARINE RED ALGAE OF PACIFIC MEXICO DAWSON: il NO. 00000 Cap gan Con ag, G00 G09 %000 “00 S00 eBReG anaes AU Meee AS) 980008 156 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 25 Fig. 1-3. Ceramium procumbens S. & G. (after Setchell & Gardner) Fig. 1, Habit of part of a prostrate filament to show opposite branching, 30; Fig. 2, A tetrasporangial branch, * 125; Fig. 3, A spermatangial branch, X 125. Fig. 4-5. Ceramium sinicola S. & G. Fig. 4, A branched, penetrating rhizoid x 120; Fig. 5, Apex of a filament to show spine, < 300. ? Fig. 6. Ceramium serpens S. & G. Habit of a tetrasporangial plant, 125 (after Setchell & Gardner). no. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Piz 2D L yn ——— 1 ee pee <<} WI Yam) 00, ~— 158 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 26 Fig. 1-3. Ceramium taylorii Daws. Fig. 1, Tip of a tetrasporangial axis, 150; Fig. 2, Series of cortical bands about 1 mm. from a sterile tip, < 250; Fig. 3, A cortical band in lower part of an axis showing ex- tended internodes, X 250. Fig. 4-6. Ceramium zacae S. & G. Fig. 4, Upper part of a tetrasporangial axis, x 150; Fig. 5, Young cortical bands, * 225; Fig. 6, Older cortical bands, 350. N Fig. Centroceras clavulatum (Ag.) Mont. Detail of cortex showing cell arrangement and whorled spines, < 325 (After Smith). PL. 26 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 1 NO. 4 LL aes= awe 7p = es BO gah ah “Segre My oD) po A 08 a. : 4 te) 9 d aN (), SS Wy _ Q, I o. o0 ‘ Zz OG 3 CBR 09 Boo Up Ra 2 & cogap np Se cy iS cos 0: ei Se Or. So solu FoR (NE NSD QO S507" WE 160 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 27 Fig. 1-2. Ceramium viscainoense Daws. Fig. 1, Habit of part of the type, < 7.5; Fig. 2, Terminal part of a tetrasporangial branch, 30. Fig. 3. Centroceras clavulatum (Ag.) Mont. Habit, < 10. Fig. 4. Centroceras bellum S. & G. Apex and tetrasporangial branch of the types ~ L2Sm(attersGuaaG.)r Fig. 5. Ceramium vagabunde Daws. Part of a tetrasporangial axis, X 34. Fig. 6-7. Ceramium sinicola S. & G. var. sinicola, X 100 (after Setchell & Gardner). Fig. 6, Apex of an axis; Fig. 7, Portion of a mature tetra- sporangial axis. Fig. 8. Ceramium sinicola var. interruptum (S. & G.) Daws. Part of an old tetrasporangial axis, < 40 (after Setchell & Gardner). ‘ 2 PL. a mS =. Sk 5 SS oe a ce oe, eee oy ee nA jo oa Se Te Lae ee eT i < a a a = MEXICO MARINE RED ALGAE OF PACIFIC DAWSON: 1 NO. 162 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 28 Griffithsia anthericephala Daws. Fig. 1, A tetrasporangial branch from a topotype, 141; Fig. 2, A cystocarpic branch from a topo- type, < 125; Fig. 3, A spermatangial branch from the holotype, 85: no. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. 28 164 Bigee! Fig. 2 Fig. 3-4. ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 29 Griffithsia ovalis Harv. a-c, Parts of a sterile and two tetrasporangial branches showing involucral cells, 30, 16, 26, respectively; d, A pedicellate tetrasporagium, X 300 (all after Abbott). Griffithsia pacifica Kylin, part of a rhizoid-bearing form of the species, X 13. Ceramium personatum S. & G. A younger (3) and an older (4) node showing development of descending corticating rhizoidal fila- ments, 330. 166 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 30 Fig. 1-3. Spyridia filamentosa (Wulf.) Harv. Fig. 1, 2. Tips of axes with blunter and more attenuated branchlets, respectively, * 10. Fig. 3. Two determine lateral branchlets showing cortical bands, 75. (after Borgesen). Fig. 4-5. Microcladia coulteri Harv. Fig. 4. Habit of upper part of a plant, Xx 2. Fig. 5, A cystocarpic branch, X 7.5 (after Smith). Fig. 6. Griffithsia pacifica. Spermatangial cluster, 250. PL. 30 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Z > i. oa 168 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 31 Fig. 1-4. Griffithsia pacifica Kylin. Fig. 1, upper part of a plant, 10; Fig. 2, A young spermatangial node, * 160; Fig. 3, A young tetra- sporangial node, * 160; Fig. 4, A mature tetrasporangial branch showing involucral cells, * 150 (after Kylin). Griffithsia tenuis Ag. Fig. 5, Upper part of an axis showing whorled hairs, X 40; Fig. 6, A tetrasporangial node, X 170. Fig. 7, A pedicellate spermatangial cluster, 400 (after Abbott). DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 3 Plsr 170 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PAS 2 (all after Taylor) Griffithsia multiramosa S. & G. Fig. 1. Habit of upper branching of a tetrasporic plant, X 33. Fig. 2. Lower branches of the same plant, x 33, Fig. 3, Tips of branchlet, X 195. Fig. 4-7. Portions of branches with tetrasporangia (4, 6-7 X 130; 5 X 75). eS (arn iN ‘i “i in se ‘ at y : M i J x ih == SS Ss iY Hy SSS a =e == San) N72 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 33 Fig. 1-2. Neopilota densa (C. Ag.) Kylin. Fig. 1. A branch, X 0.66. Fig. 2. Branchlet, X 4 (after Smith). Fig. 3-4. Neoptilota filicina (Farl.) J. Ag. Fig. 3. A branch, X 0.66. Fig. 4. A branch, * 4. (after Smith). Fig. 5-6. Branchioglossum undulatum Daws. Fig. 5. A cystocarp showing pro- minent rostrum, < 34. Fig. 6. A spermatangial blade, X 7.5. al vo PL. DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO no. Ll 174. ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 34 Fig. 1. Branchioglossum woodii (J. Ag.) Kylin. Habit of a tetrasporangial plant, X 1. Fig. to Sorella delicatula (Gard.) Holl. Habit, 3. Fig. 3. Hypoglossum attenuwatum var. abyssicolum (Tayl.) Daws. Habit, OX no. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Pia 176 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PIA ES Fig. 1-2. Hypoglossum retusum Daws. Fig. 1, Habit, X 6. Fig. 2. Detail of retuse apex of blade, 30. Fig. 3-4. Schizoseris pygmaea Daws. Fig. 3. Habit of young plant, 3. Fig. 4. Transection of a midrib and part of a blade. Membranoptera spatulata Daws. Habit of a spermatangial plant, Koo: Fig. 6-7. Holmesia californica (Daws.) Daws. A simple and a forked tetra- sporangial branchlet, * 33. Fig. Or no. lL DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Pl. oD 7Q ‘ ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 36 Holmesia californica (Daws.) Daws. A mature tetrasporangial plant, >< Oa: no. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO Pi O 180 Fig. Fig. ig. 3-6. ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 37 Taenioma perpusillum (J. Ag.) J. Ag. Habit. Polyneurella hancockit var. rhizoides Daws. Part of the margin of a blade of the type specimen showing rhizoids and proliferous bladelets, 5. Phycodrys profunda Daws. Fig. 3-4. Sterile blades of D. 8456, X 3. Fig. 5. A tetrasporangial blade with superficial sori, & 5. Fig. 6. Margin of a blade of D. 5519 with lateral tetrasporangial out- growths, X 12.5. . Phycodrys lucasana Daws. Fig. 7. Part of the tetrasporangial type, 3.25. Fig. 8. One of the marginal rhizoid-bundle outgrowths, 30. no. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO iby Bl kc ew 182 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE, 38 Fig. 1. Sorella pinnata Holl. Habit, X 2. Fig. 2-3. Phycodrys simplex Daws. Habit of two specimens of the type collec- moa, P< ile as ~~ MARINE RED ALGAE OF PACIFIC MEXICO DAWSON: 1 NO. 184 Fif. Fig. =e Fig. Fig. 2-3. nr ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 39 Branchioglossum woodiu (J. Ag.) Kyl. Apex of a blade, X 860 (after Smith). Platysiphonia parva Silva & Cleary. Fig. 2. Optical periclinal section of apex of a tetrasporangial blade. Fig. 3. Optical longisection of a tetrasporangial blade showing origin of sporangia and cover cells (After Silva & Cleary). Platysiphonia clevelandiu (Farl.) Papenf. Margin of a tetrasporangial blade to same scale as adjoining P. parva to show divided flanking cells (after Silva & Cleary). Grinnellia lanceolata Daws. Part of a tetrasporangial plant, 3. Polycoryne gardneri Setch. A young thallus and pairs of mature cystocarpic, spermatangial and tetrasporic branches, X 11 (after Wagner). 186 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 40 Fig. 1. Platysiphonia clevelandii (Farl.) Papenf. Habit, X 8 (after Smith). to Fig. Polyneura latissima (Hary.) Kylin. Habit, X 0.6 (after Smith). Fig. 3-4. Polyneurella hancockti Daws. Fig. 3. Habit, 0.8. Fig. 4. Detail of apex, X 360. Cr Fig. Myriogramme divaricata Daws. Part of a tetrasporic blade, * 1.6. Fig. 6. Sorella pinnata Holl. Branching habit, < 8.5. PL. 40 MARINE RED ALGAE OF PACIFIC MEXICO DAWSON No. 1 188 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 41 Nienburgia andersoniana (J. Ag.) Kylin. Two of the broader forms of the species, X 1. no. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. Ail 190 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 42 Fig. 1. | Nienburgia andersoniana (J. Ag.) Kylin. One of the extremely nar- row forms of the species from Punta Pequena, < 1. Fig. 2 Myriogramme divaricata Daws. Several specimens from the type collection, 1. il DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. 42 192 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 43 Fig. 1. Phycodrys lucasana Daws. Part of the tetrasporangial type collec- tions 3 te Fig. 2. Acrosortum uncinatum (Turn.) Kylin. Habit of part of an entangled plant to show hamate branches, >< 2. no. l DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. 43 194, ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 44 Phycodrys amplissima Daws. A spermatangial plant of the type collection, < 1. no. | DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. 44 196 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 45 Fig. 1. Phycodrys setchellii Skotts. Part of a small tetrasporangial plant showing blades from a decumbent stipe, * 1.5 (after Smith). Fig. 2-3. Phycodrys amplissima Daws. Fig. 2. Detail of apex of a branch, 325. Fig. 3. Detail of margin of a blade to show irregular micro- scopic teeth, X 100. Fig. 4. Cryptopleura imbricata. A tetrasporangial lobe, > 8. Fig. 5-7. Haraldia prostrata Daws., Neuch. & Wildm. from the type collection. Fig. 5. Habit of a blade from a congested group, 3.5. Fig. 6. A tetrasporangial lobe, * 15. Fig. 7. A marginal spine, 300. Fig. 8. Anzsocladella pacifica Kyl. A sterile plant, * 2 (right), and a tetrasporangial blade, * 2. (These drawings from Smith (1944) are of exceptionally large, luxuriant plants from the Monterey, Calif., region. Mexican examples are usually less than half this size,) PL. 45 MARINE RED ALGAE OF PACIFIC MEXICO DAWSON: no. l 198 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 46 (all after Smith) Fig. 1. Erythroglossum californicum (J. Ag.) J. Ag. Habit, * 2. Fig. to Myriogramme spectabilis (Eaton) Kylin. Habit of a tetrasporangial plant, < 0.66. Fig. 3. Cryptopleura violacea (J. Ag.) Kylin. Habit of a tetrasporangial plant, X 0.5. Fig. 4. Cryptopleura lobulifera (J. Ag.) Kylin. Habit of a tetrasporangial plant, < 0.5. Fig. 5-7. Myriogramme hollenbergii Kylin. Habit of tetrasporangial, cystocar- pic and spermatangial plants, respectively, X 2. PL. 46 MARINE RED ALGAE OF PACIFIC MEXICO DAWSON No. 1 200 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 47 Fig. 1. Myriogramme osoriot Daws. Habit of a tetrasporangial plant, 5.5. Fig. 2, Part of a transection of a mature blade. Fig. 3. Taenioma perpusillum (J. Ag.) J. Ag. A branch with three terminal hairs.) >< 70: Fig. 4. Myriogramme caespitosa Daws. Habit of part of a cystocarpic plant dissected out of a cluster, X 8. pall ___ppe3eg Sceselenencminnn DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. & 202 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 48 Fig. 1. Cryptopleura imbricata Daws. Habit, 1.8. Fig. 2. Cryptopleura spatulata Gard. Habit, < 0.9. no. l 204. ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 49 Fig. 1. Cryptopleura corallinara (Nott) Gard. Habit of a plant on Pterocla- dia, X 3. Fig. 2. Cryptopleura crispa Kylin. Habit of a luxuriant plant on Corallina, ye ile no. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. 49 206 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 PLATE 50 Botryoglossum farlowianum (J. Ag.) De Toni. Fig. 1. Habit of an entire plant, X 0.5. Fig. 2. Part of a tetrasporangial blade, X 1 (after Smith). NO. 1 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO PL. 50 ALLAN HANCOCK PACIFIC EXPEDITIONS VOLUME 25 COMPLETE POLYCHAETOUS ANNELIDS FROM CALIFORNIA by OLGA HARTMAN UNIVERSITY OF SOUTHERN CALIFORNIA PRESS LOS ANGELES, CALIFORNIA 1961 a wee, Bi i | | yy mur j ait o i i ee aa Le (re By Ay ow, vi -_ aN Fae ne | " ie iy td 4 eer oe Pee a aumetenendan