32 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



alternate; cells averaging about 1.5 times as long as wide; chromatophore 

 stellate with a central pyrenoid ; monosporangia terminal and lateral on 

 the main axis and on the branchlets ; sexual reproduction not observed. 



Type: Holotype is Drew 1037 on sheet 294558 in the Herbarium 

 of the University of California, Berkeley. 



Type locality: Moss Beach, San Mateo County, California. 



Mexican distribution: Gulf of Calif. — D. 686d-40, on Spha- 

 celaricj Isla Turner, July. 



Kylinia secundata (Lyngbye) Papenfuss 

 Plate 1, fig. 3 



Papenfuss, 1947, p. 437. Acrochaetiurn secundaturn (Lyngbye) Na- 

 geli, as employed by Kylin, 1944, p. 19, fig. 11 ; Taylor, 1937, p. 230, pi. 

 31, figs. 1-3. Callitharnnion daviesii var. secundatum Lyngble, 1819, p. 

 129. 



Thalli epiphytic, 0.5-1.5 mm. high, consisting of erect, branched fila- 

 ments from a usually monostromatic basal layer; erect filaments 7-8 /* 

 in diameter, of cells 1-3 times as long as broad, each with a single stellate 

 chromatophore with a large pyrenoid situated toward the distal end; 

 branching sparse or absent below, frequent above, rather strict, more or 

 less indeterminate, with longer and shorter branches mixed ; unicellular 

 hairs produced from upper branches ; monosporangia sessile or pedicellate, 

 not observed in full development in the Mexican material. 



Type: Holotype not designated, but represented by Lyngbye's 

 original specimen in the Botanical Museum, University of Copenhagen, 

 Denmark. 



Type locality: Denmark. 



Mexican distribution : Gulf of Calif. — D. 462a, epiphytic with 

 Acrochaetiurn punctatum on the "leaves" of Sargassum, Bahia Bocochi- 

 bampo, Sonora, Feb. 



Kylinia seriaspora sp. nov. 

 Plate 2, figs. 2-5 



Thallis e strato monostromatico basali formatis e quo multa filamenta 

 ramosa, erecta; filamentis erectis 600-800 /x longis, 5-7 yx diametro, e 

 cellulis duplis usque etiam quadruplis longitudine quam latitudine; cre- 

 bro ramosis, secundis vel alternatis; monosporangiis in serie secunda, 

 plerumque in pedicellis unicellularibus ; tetrasporangiis alternatis vel 

 secundis, sessilibus vel in pedicellis uni- vel etiam bicellularibus, mode 

 una modo utraque cellula pedicellata fiente tetrasporangiis. 



