NO. 1 TAYLOR : PACIFIC MARINE ALGAE 243 



liferous from the lower stalklike portion, these branchlets once or twice 

 forked ; structurally showing a wide pseudoparenchymatous medulla with 

 cells elongated in longitudinal section, and thick walls, the inner cortex of 

 1-2 layers of smaller cells and the outer cortex of 2-3 layers of cells, the 

 inner more rounded, the outer more square in section; sporangia tetra- 

 partite, crowded in nemathecia in the central medulla, often in small 

 clusters. 



Ecuador: Archipielago de Colon, gregarious on surf-beaten inter- 

 tidal rocks south of Black Beach Anchorage, I. Santa Maria, nos. 34-230, 

 34-392 (TYPE), 17, 30 Jan. 1934. 



Ghondrus (?) albemarlensis n. sp.^^^ 

 Plate 81, Fig. 2 



Plants to 12-15 cm tall, dull purplish and nitent, base slightly con- 

 tracted, compressed, very short, above flat and very irregularly branched, 

 the lateral branches small, the central continuing upward, membranous, 

 forked 3-4 times, the divisions commonly to nearly 2 cm, rarely to 3 cm 

 broad, near the rounded subacute tips 1 cm wide; structurally showing a 

 wide pseudoparenchymatous medulla with cells elongated in longitudinal 

 section, the walls thick, the inner cortex of 1-2 layers of smaller cells and 

 the outer cortex of one, occasionally two layers of cells square in section ; 

 sporangia tetrapartite, the sporangia in nemathecia crowded in the central 

 medulla, the sporangia in short series formed laterally on the medullary 

 filaments, the nemathecia 0.3-1.0 mm diam., young and old sori inter- 

 mixed over the upper part of the blade below the last fork, often merging, 

 not perforating the blade when mature. 



These plants at first sight resemble nos. 34-230 and 34-393, but are 

 more consistently broad to the tips and show a very different growth habit 

 in the lower parts of the plants. In structure they are very similar, but 

 have a thinner cortex. In the absence of sexual material the allocation of 

 these two species to Chondrus is necessarily tentative. The position of the 

 tetrasporangia discourages an assignment to Rhodoglossum. 



Ecuador: Archipielago de Colon, from surf-beaten rocks at Pt. 

 Christopher, I. Isabela, no. 34-206 (TYPE), 16 Jan. 1934. 



149 Chondrus albemarlensis n. sp.— Planta ad 12-15 cm altitudine, irregulariter 

 ramosa, infra compressa, super ramos centrales plana, supra membranacea, 3-4- 

 furcata, divisionibus ad 2-3 cm lat., prope cacumina 1 cm lat., cacuminibus rotun- 

 datis, subacutis; nematheciis dispersis et aetatibus intermixtis, 0.3-1.0 mm diam., 

 in structura medullam externam constantem ex uno vel interdum duobus stratis 

 cellularum praebentibus. Planta typica in loco dicto I. Isabela, Ecuador, legit W. 

 R. Taylor no. 34-206, 16 Jan. 1934. 



