NO. 1 TAYLOR: PACIFIC MARINE ALGAE 227 



Little can be done with the numerous dwarfed and partially developed 

 forms of this genus found in shallow-water collections, often intermixed 

 with other genera. At best, the species tend to be polymorphic, and unless 

 well developed there is little hope of effecting even an approximate deter- 

 mination. 



Hypnea Johnstonii Setchell & Gardner 



Setchell & Gardner 1924, p. 758, pi. 23, figs. 19-21, pi. 57. 



Mexico: Baja California, among Corallinae and coarse calcareous 

 sand in shallow water, Point Hughes on Cabo San Lazaro, no. 34-664, 

 7 Mar. 1934. 



Hypnea califomica Kylin 



Kylinl941,p. 20, pi. 6, fig. 16. 



These, especially the Ecuadorean, were small specimens much resem- 

 bling H. Valentine. However, they are probably best allocated to Kylin's 

 new species. 



Mexico: Guerrero, on rocks in Ba. Petatlan, no. 34-572 A, 2 Mar. 

 1934. Ecuador: Guayas, on the rocky southeast side of St. Elena 

 Point, Salinas, no. 34-460A, 8 Feb. 1934. 



Hypnea pannosa J. Agardh 

 Plate 71, Fig. 2 



Kiitzing 1868, p. 9, pi. 27, figs, i, k. 



Comparison with authentic material loaned by the Field Museum of 

 Natural History has convinced the author that his Mexican material is 

 identical with H. pannosa J. Agardh. The type locality is on the Pacific 

 coast of Mexico. For the lack of reference material, this species has been 

 ill known. The Ecuadorean material is not quite so like the typical thing, 

 being looser. Farlow (1902, p. 98) correctly reports this species from 

 Tagus Cove and Turtle Point, I. Isabela, Ecuador. Dawson ( 1944, p. 

 291 ) reports it from the Gulf of California. 



Mexico: Nayarit, on rocks, I. Isabel, no. 34-588D, 5 Mar. 1934. 

 Ibid., dredged from 21.5 meters' depth at sta. 970 near I. Maria Magda- 

 lena. Las Tres Marias, no. 39-654, 9 May 1939. Panama: crevices of 

 rocks in high tide pools, Islas Secas, no. 39-125, 26 Mar. 1939. Ecua- 

 dor: Archipielago de Colon, forming mats on intertidal rocks. Black 

 Beach Anchorage, L Santa Maria, no. 34-269, 18 Jan. 1934. 



