NO. 1 TAYLOR: PACIFIC MARINE ALGAE 273 



Anchorage, I. Santa Maria, no. 34-262, 18 Jan. 1934. Ibid., interti'dal 

 on rocks on an islet in Gardner Bay, I. Espanola, no. 34-426, 31 Jan. 

 1934. Manabi, in small mats of mixed algae, I. La Plata, no. 34-475, 

 10 Feb. 1934. 



SPYRIDIA Harvey, 1833 



Plant forming erect, bushy masses, much alternately or irregularly 

 branched, the branches corticated by transverse series of longitudinally 

 elongate cells, w^hich eventually become subdivided and covered by rhi- 

 zoidal downgrowths ; ultimate branchlets of limited growth, consisting 

 of a uniseriate axis bearing rings of small cells at the nodes, but the inter- 

 nodes long and translucent, the terminal and sometimes the lower nodes 

 armed with a spine; sporangia tetrahedral, seriate on the upper side of 

 the branchlets; spermatangia on the nodes of the branchlets; cystocarps 

 surrounded by slender filaments at the tips of small branchlets. 



Spyridia filamentosa (Wulfen) Harvey 



Taylor 1937, p. 343, pi. 44, fig. 2, pi. 46, figs. 2-5. 

 Panama : Bahia de Panama, common on rocks in shallow quiet water 

 near the anchorage on I. Taboga, no. 34-624, 2 May 1939. 



Delesseriaceae 



Plants usually foliaceous, simple or somewhat branched, or bushy; 

 the branches commonly from the margin and delicately membranous, the 

 blades with or without a midrib, lateral veins or veinlets; growth from a 

 cross-dividing apical cell and regular longitudinal or transverse cell rows 

 derived from it, or from an ill-defined marginal growing region, or inter- 

 mediate conditions; sporangia tetrahedral, usually in son; spermatangia 

 in superficial sori ; two four-celled carpogenic branches borne together on 

 a special segment from the supporting cell, which develops the auxiliary 

 cells after fertilization, or one carpogenic branch suppressed; cystocarp 

 with a central fusion cell, all or only the outer cells of the gonimoblasts 

 forming carpospores, discharged through the ostiole of the thin inflated 

 pericarp. 



KEY TO GENERAi^o 



1. Tetrasporangia in a single layer; cystocarps subglobose, very 

 prominent; growth from a marked apical cell . . . Caloglossa 



1. Tetrasporangia formed on both sides of the blade; cystocarps 

 moderately prominent 2 



I'O Largely based on Kylin 1924, p. 102 ff. 



