NO. 1 DAWSON : MARINE RED ALGAE OF PACIFIC MEXICO 55 



Bonnemaisoniaceae 



Bonnemaisonia hamifera Hariot 

 Plate 18, fig. 1 



Hariot, 1891, p. 223; Feldmann & Feldmann 1942, p. 145, Aspar- 

 agopsis hamifera (Hariot) Okamura, 1921a, p. 131, pi. 184, figs. 10-16; 

 Kylin, 1928, p. 22, figs. lOA-E; Kylin 1941, p. 6; Dawson, 1945b, p. 65. 



Gametophyte generation 



Thalli epiphytic, attached to the host by means of an entangling, 

 hamate tendril-organ, to 7 cm. high, consisting of an irregularly multi- 

 fariously branched cylindrical primary axis about 1 mm. in diameter, the 

 indeterminate branches all provided with numerous ascending, terete, 

 multifarious determinate branchlets mostly about 2 mm. long and 100- 

 150 fx in diameter, these occasionally replaced by a relatively large, 

 specialized, hamate branchlet about 500 fx. thick in mid-parts and adapted 

 for entangling attachment ; main axis in transection showing a central 

 axial filament running through a clear space, this surrounded by 2-3 

 layers of large, globose, medullary cells grading from 300-400 fi in dia- 

 meter in the inner layer to 180-100 /a in the outer layer, and a single, 

 superficial cortical layer of pigmented periclinally arranged ovoid cells 

 50-100 fi in greatest diameter; determinate branchlets with the same 

 structure as the main axis but with a more limited medulla; reproduc- 

 tion apparently mainly by vegetative fragmentation. Fertile plants un- 

 known in the Mexican material. 



Type: Holotype is a collection by Dr. Savatier, probably in the 

 Herbarium of the Museum d'Histoire Naturelle, Paris. 



Type locality: Yokosuka, Japan. 



Pacific coast distribution: California — Herb. Agardh 33660, 

 33662, Santa Barbara; Silva 2916, Goleta, Nov.; Silva 4067, Santa 

 Rosa Island, Jan. ; Silva 4506, San Nicolas Island, Feb. ; Silva 6055, 

 Santa Cruz Island, Mar. (all Silva collections in Herb. U. C.) ; Gard- 

 ner 2485, Santa Monica, Mar.; P.B.A. 490, Pacific Beach. Pacific Baja 

 Calif.— Cooper 848 (Mar.), D. 104-45, 172-45 in Herb. U.C. (Apr.), 

 D. 5293 (Sept.), Punta Descanso; D. 9667, in drift, Punta San Quin- 

 tin, Apr. 



Sporophyte generation 



Feldmann and Feldmann (1942, p. 145-50) have expressed the 

 "working hypothesis" that the plant widely known as Trailliella intri- 

 cata (Holmes & Batters) Batters is the tetrasporophyte generation of 



