NO. 1 TAYLOR: PACIFIC MARINE ALGAE 221 



base into two or three similar segments, the margin entire or sh'ghtly undu- 

 late, the thickness to 150-175 fx, (soaked up) ; structurally showing a 

 medulla about 90 fi thick consisting primarily of a fairly close network of 

 filaments 4-5 [x diam. with thin walls and granular contents, among which 

 there is a network of sparingly anastomosing very highly refractive fila- 

 ments, 7-20 fx diam., which is readily seen through the cortex when the 

 specimen is wet ; the inner cortex loose, of cells about 7 fi diam., separated 

 by intervals of 5-7 [x, grading gradually through 5-7 layers of smaller and 

 more closely placed cells in tiers to the surface layer of radially oval cells 

 about 2.0-4.0 fx long, separated by 1.5-4.0 fi of wall thickness and covered 

 by a firm, clearly delimited surface jelly about 3 fi thick; outer cells in 

 surface view rounded, with thick lateral walls, 3.5-5.5 /x diam.; sporangia 

 tetrapartite, scattered, immersed in the cortex, about 9-11 [x diam., IS- 

 IS jx long; cystocarps numerous, 0.1-0.2 mm diam., slightly protuberant, 

 with a pore on one surface, the carpospore mass surrounded by a few 

 pericarpic filaments, attached to a single basal cell, the spores small, 

 broadly oval, about 15 /x long. 



These blades seem to differ from Howe's (1914, p. 163) S. hetero- 

 nema in being smaller, in their simpler form, lacking innovations, the 

 more slender refractory medullary filaments which rarely meet in poly- 

 radiate ganglia, the smaller cortical cells, shorter tetrasporangia, and 

 other minor features. 



Ecuador: Archipielago de Colon, dredged from 27 meters off Post 

 Office Bay, I. Santa Maria, nos. 34-2S0A, 34-297 (cystocarpic and tetra- 

 sporic), 19 Jan. 1934. Ibid., dredged from 33 meters off Post Office 

 Bay, no. 34-384 (cystocarpic, TYPE), 29 Jan. 1934. 



Solieriaceae 



Plants plane or bushy, subsimple or branched, the branches round or 

 somewhat compressed, firmly fleshy; structurally showing a loosely fila- 

 mentous medulla and a falsely parenchymatous cortex with smaller cells 

 without, larger within ; tetrasporangia formed at the surface of the cortex, 

 zonate; carpogenic branches of three or four cells borne in the inner 

 cortex, the scattered auxiliaries similarly placed; cystocarps immersed, 

 showing a central fusion mass or sterile tissue, and discharging by a pore. 



KEY TO GENERA 



1. Plants bushy, the branches terete Agardhiella 



1. Plants simple or bushy, the branches compressed to strap shaped 

 orfoliaceous Sarcodiotheca 



