198 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



ceptacles broadly pyriform, ultimately with two hornlike projections 

 which may develop into branchlets of one to several segments that in turn 

 may end in conceptacles and repeat; so conceptacles may support 1-4 suc- 

 cessive forkings, in which case the branching becomes rather wider angled 

 than in the sterile part. 



This plant in habit suggests a dwarfed /. ruhens, but the proportions 

 and diameters of the segments are not in agreement. It is different also 

 from Setchell & Gardner's (1930, p. 179) Guadeloupe Island plant, 

 which is much more slender than /. ruhens (L.) Lamour., s. s., even as 

 these are coarser. 



Mexico: Oaxaca, with driftweed in Ba. Tangola-Tangola, no. 34- 

 553, 28 Feb. 1934. Guerrero, littoral on rocks in the surf at Ba. Petat- 

 lan, no. 34-569 (TYPE), 2 Mar. 1934. 



Jania ungulata Yendo, prox. 

 Plate 45 p. p.; Plate 53, Figs. 2-4 



Plants in close tufts, 1.0-1.5 cm tall, widely branched below, sub- 

 complanate and closely corymbosely or subflabellately branched above, 

 the lower segments 100-190 /x diam., 340-425 fx long below, short in the 

 upper parts and often somewhat compressed, the terminal segments broad, 

 and clearly compressed. 



Yendo 1902, p. 26, pi. 3, figs. 7, 8, pi. 7, fig. 8. 



These plants suggest the f. brevior Yendo ; but, since he does not give 

 measurements of his plant, it is difficult to be sure; the resemblance may 

 be superficial and the plants only abnormal /. adhoerens Lamouroux, or 

 possibly nos. 34-169A and 34-472 represent phases of the variation of 

 no. 34-569 here described as a new species, /. mexicana. 



Ecuador: Archipielago de Colon, intertidal from a reef north of 

 Tagus Cove, I. Isabela, 720. 34-169 A, 13 Jan. 1934. Guayas, dredged 

 off La Libertad, Schmitt no. 12F-33, 19 Jan. 1933. 



JOGULATOR Manza, 1937 



Joculator pinnatifolius Manza 



Plate 61 



Plants tufted, to 6 cm tall, sparingly branched from near the base and 

 with several shorter branches near the tip ; main axes with segments cylin- 

 drical at the base, trapezoidal above with the upper angles truncate, 0.9- 

 1.1 mm long, generally longer than broad, the midline ridged; closely 

 pectinate pinnate, the lateral branchlets 1-3 mm long, borne at the angles 



