280 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



Others linear-lanceolate and attenuated; transections in mid-parts 250- 

 500 fi thick, showing a dense filamentous medulla and a subcortex of 

 about 3 layers of rotund cells 11-18 fi in diameter grading into a pig- 

 mented cortex of anticlinal rows of small, squarish cells 3.5-5 fi in dia- 

 meter; cystocarps embedded, ostiolate, borne abundantly in the secondary 

 pinnate branchlets, to 250 /x, in diameter, often becoming crowded and 

 causing some bulging of the bearing branchlet; carpospore mass ± 

 completely enveloping the auxiliary cell pedicel; carpospores 15-17 /* 

 in diameter; antheridia not seen; tetrasporangia borne in nemathecial 

 sori on the secondary branchlets, cruciate, slender, about 45-50 /x, long, 

 9-12 fi wide. 



Type: Holotype is Johnston 53e, April 1922, on sheet 1374 in the 

 Herbarium of the California Academy of Sciences, San Francisco, Cali- 

 fornia. 



Type locality: Isla San Esteban, Gulf of California, Mexico. 



Mexican distribution: Gulf of Calif. — D. 865, Isla Jorge, 

 Feb.; Remple 3/26/37, near Punta Lobos; D. 707, Puerto Libertad, 

 Feb.; D. 1034, Isla Rasa, Feb.; D. 295-40, Puerto Refugio, Isla Angel 

 de la Guarda, Jan.; D. 748, Isla Patos, Feb.; D. 960, Bahia Agua 

 Dulce, Isla Tiburon, Feb.; D. 1063, Isla Alcatras, Feb.; D. 658-40, 

 just north of Kino, July; D. 453-40, Isla San Esteban, Feb.; D. 727-40, 

 Isla Turner, July; D. 1347, Bahia de Los Angeles, Apr.; D. 11009, 

 Puerto San Carlos, June; D. 608, Feb., D. 1852, 1906, May, D. 11029, 

 June, D. 3500, Nov., Ensenada San Francisco; D. 487, 520, Feb., D. 

 1711, May, Ensenada Bocochibampo, near Guaymas; D. 539, 540, 

 Punta Colorado, near Guaymas, Feb. ; D. 632, Ensenada Carrizal, near 

 Guaymas, Feb. ; Drouet & Richards 3402, 3404, Punta San Pedro, near 

 Guaymas, Dec; D. 46-40, Jan., D. 490-40, Feb., Bahia Guaymas; 

 D. 3494, Bahia Empalme, Nov.; D. 7101, Punta Aguja, Bahia de la 

 Concepcion, Mar.; D. 539d-40, Feb., D. 7121, Mar., Bahia Agua 

 Verde; D. 10902, inner Bahia Topolobampo, June; D. 7010, Bahia San 

 Gabriel, Isla Espiritu Santo, Mar. ; D. 634-40, San Jose del Cabo, Feb. ; 

 D. 6763, Cabeza Ballena, Mar. 



Most of the winter and early spring collections were sterile while 

 the summer and fall collections were mature and fertile. 



Zanardinula vizcainensis sp. nov. 

 PI. 21, fig. 67 



Thallis erectis, laxe dumosis, ad 20 cm. altis; ramificatione axium 

 maiorum plerumque dichotoma intervallis 2-4 cm. ; segmentis compressis 

 vel complanatis, fere 1 mm. latis, 300-450 /i crassis ; ramulis secundariis 



